PRESIDENT’S OFFICE REGIONAL ADMINISTRATION AND LOCAL GOVERNMENT

LINDI REGION

FORM FOUR PRE NATIONAL EXAMINATION

CODE: 033/1 BIOLOGY 1

TIME: 3 HOURS SEPTEMBER 2023

INSTRUCTIONS

1. This paper consists of sections A, B and C with a total of eleven (11) questions.
2. Answer all questions in sections A and B and two (2) questions from section C.
3. Section A carries 16marks, section B 54 marks and section C carries 30 marks
4. All writing should be in blue or black ink, except for diagrams that must be drawn in pencil.
5. Cellular phones and any unauthorized materials are not allowed in examination room.
6. Write your examination number on every page of your answer sheet(s).

SECTION A (16 MARKS)

Answer all question in this section

1. For each of the items(i)-(x) choose the correct answer from among the given alternatives and write its letter beside the item number in the answer sheet provided.

1. An old man was passing near the bush at night on the way to home. He saw a lion coming to him and started to run away, which characteristics was shown by an old man?

1. Movement and nutrition
2. Movement and irritability
3. Irritability and growth
4. Respiration and reproduction
5. Excretion and growth

2. During the cause of investigation, a form II student put a piece of bread in a wet cupboard, after few days the bread was covered with grayish substances(organisms). What is the name of this organism which grows on bread?

1. Penicillium
2. Rhizopus stolonifer
3. Entamoeba historitica
4. Agaricus compestris

5. Saccharomyces cerevisiae

3. Which of the following is the correct order of events?

1. Fertilization, implantation, ovulation
2. Ovulation, fertilization, implantation
3. Implantation, ovulation, fertilization
4. Fertilization, ovulation, implantation
5. None

4. Students at Kimble Secondary school were visited by the Minister of health and social welfare and educated about risk behaviors that must be abstained. Among the behaviors to be abstained were:

1. Raping and alcoholism
2. Alcoholism and patience
3. Drug abuse and exercise
4. Raping and patience
5. Unsafe sexual intercourse and exercising

5. Which of the following statement is incorrect about a seed?

1. Seed develops from ovary
2. Embryonic shoot develops to radical
3. Embryonic radical develops to stem
4. Ovule produces seed
5. Cotyledon forms seed

6. In a motor car accident, the bus driver found that he could hardly maintain his equilibrium, which of the structures was damaged?

1. The semi-circular canal
2. The fore brain
3. The medulla oblongata
4. The Eustachian
5. The cochlea

7. Dr. Kigulunyembe received medical results from laboratory technician and identified that a victim is affected by filarial worms. Which of the following disease is typical caused by the above worms?

1. Lymphoma
2. Oedema
3. Thrombosis
4. Elephantiasis
5. Arteriosclerosis

8. Mr. and Mrs. James, happened to have four children in their marriage. One of them is albino. What is the possible genotype of Mr. and Mrs. James?

1. AA x aa
2. Aa x Aa
3. AA x Aa
4. Aa x aa
5. Aa x aa

9. During the biology class session, a biology teacher explained to his students about a theory of origin of life which state that “the universe has always existed and has no origin, that is, it did not have a moment of creation thus life has no origin” Which of the following is the correct name of this theory

1. Cosmozoan theory
2. Spontaneous generation theory
3. Organic evolution theory
4. The steady state theory
5. Special creation theory

10. Most of the students have fail to make a distinction between members of class arachnida from those of class insect when they were classifying different living organisms in biology laboratory. As the expert of biology what feature distinguishes these two groups of phylum Arthropod?

1. The insects have three body parts while arachnids have four body parts
2. The insects have one pair of antennae while arachnids have two pair of antennae
3. Insects have six pair of walking legs while arachnids have three pair of walking legs
4. Insects are carnivorous while arachnids are herbivorous
5. Insects carry out gaseous exchange through tracheoles system while arachnids carry out gaseous exchange through book lungs.

2. Match the List A with the responses in List B by writing the letter of the correct response from List B beside the item number of List A in the answer booklet provided.

SECTION B (54 MARKS)

Answer all question from this section.

3. Similar type of animal cells were placed in three different solutions namely A, B and C. After some time, the cell in solution A busted, the cell in solution B shrank and shriveled and the cell in solution C did not change.

1. Which type of solutions were A, B and C?
2. Explain the reasons for such observations.

4. (a) In a school garden, butterfly and bees were flying from one flower to another. This action is said to be more important in fertilization of plants

1. Give the name of the process which was facilitated by the action of these insects.
2. Explain the two types of the process which was facilitated in 4(i) above

(b) Why breast feeding is more preferable to bottle feeding?

5. (a) Good manner and personal hygiene should be observed and considered at a great extent in any community. Validate the statement by briefly explaining any three (3) points.

(b) Assume you have been invited by head teacher of Matumbawe primary school to educate standard seven pupils on how they can maintain personal hygiene during their puberty stage. Prepare three detailed points that you are going to teach them.

6. (a) Reptiles are organisms whose body temperature is affected by environmental temperature. Briefly explain three ways that help reptiles to survivein different weather condition.

(b) With examples, briefly explain how comparative embryology provides evidences to support evolution.

(c) Explain why fossil records as the evidence of organic evolution are usually incomplete? (Two points)

7. (a) Growth pattern of an organism refers to the series of growth and development whereby in the first stage of growth the organism slows down the rate of growing due to several factors. Using five points approve the statement above.

(b) Mr. Tindwa is a farmer, he made a survey to the farm where maize was planted and observed that all seeds have germinated. State the environmental conditions that are necessary and their function for germination to take place.

8. (a) With examples distinguish between

1. Continuous and discontinuous variation
2. Homologous and analogous structure

(b) In a legal court family of John and Juma, each claimed to have a boy by the name Crispin whose blood group was determined to be AB. John was established to have blood group A and his wife blood group O. Juma had blood group A and his wife blood group B. Determine which family is likely to be biological parents of Crispin. Using punnet square show your work clearly.

SECTION C(30 MARKS)

Answer two questions from this section

9. Humans like all organisms reach a stage whereby the smooth functioning of the cell in the body decline and tend to show low immunity, less body performance or efficiency, hormone production decrease and less ability to respond different stresses. By giving six points explain the factors that led to the above human body deterioration.

10. On 6^th March 2020 Minister of healthy Honorable UmmyMwalimu announced the occurrence of a pandemic disease called COVID-19 in our country. Many Tanzanians were confused because all schools, colleges and universities were closed. As you are form four (4) student, educate the majority on the cause, symptoms and preventive measures of COVID-19 disease.

11. Form four biology students went Muhimbili hospital to collect data for their project titled “Why increasing in number of drugs addicted people to our society?” As a medical Doctor of Muhimbili hospital how would you respond to these students (six points)

THE UNITED REPUBLIC OF TANZANIA PRESIDENT’S OFFICE REGIONAL ADMINISTRATION AND LOCAL GOVERNMENT

 ZONAL FORM FOUR MOCK EXAMINATIONS 

(NJOMBE, MBEYA, SONGWE, RUKWA AND KATAVI REGIONS)

033/1 BIOLOGY

TIME 3:00 HOURS YEAR: 2023

INSTRUCTIONS

1. This paper consists of sections A, B and C with a total of eleven (11) questions.
2. Answer all questions in sections A and B and two (02) questions from section C.
3. Cellular phones and any unauthorized materials are not allowed in the examination room.
4. Section A carries sixteen (16) marks, section B carries fifty four (54) marks and section C carries thirty (30) marks.
5. Write your Examination Number on every page of your answer booklet(s).

SECTION A: (16 MARKS)

Answer all questions

1. For each of the items (i-x) choose the most correct answer among the given alternatives and write it letter beside the item number on your answer sheet/booklet(s) provided.

(i) Vereliana was teaching the students in the classroom , suddenly her phone ring and heard it and moving towards the phone and pick it, what two characteristics of living things used in the phenomena______________ 

1. Movement and Nutrition
2. Nutrition and Reproduction
3. Reproduction and Growth
4. Irritability and Movement
5. Irritability and Nutrition [       ]

(ii) In performing food test experiment form four students mixed 2cm³ food sample solution “’A’’ with 2cm³ of sodium hydroxide solution followed by two drops of copper (II) sulphate solution which were added drop wise while shaking the mixture after each drop. Finally the colour of the mixture turned to purple. What food substance present in food sample solution “A” ______________

1. Protein present 
2. Starch present 
3. Lipids present 
4. Reducing sugar present
5. Non reducing sugar [       ]

(iii) Which of the following sets present in mammalian blood is directly concerned with combating of diseases?________________

1. Red blood cells and platelets 
2. Platelets and anti-bodies
3. Phagocytes and lymphocytes 
4. Whites blood cells and red blood cell
5. Lymphocytes and plasma [       ]

(iv) Ezekia is working in the petroleum processing industry, and you decided to visit him for study tour. What safety signs are likely to be seen as you are approaching the gate?_________________

1. Explosive and toxic
2.  Flammable and corrosive
3. Corrosive and explosive
4. Corrosive and fire extinguisher 
5. Flammable and toxic [       ]

(v) Form three students were investigating different kind of flowers around the school garden. In their investigation they observed that most of the plants in the school garden have both pistils and stamens on the same flower. How can you term these flowers?________________

1. Unisexual 
2. Incomplete flower 
3. Dioecious 
4. Zygomorphic
5. Complete flower [       ]

(vi) Form four students planted beans seeds in the school garden, after six days they observed that the cotyledons of beans seeds were raised above the ground. Do you think which of the following a type of germination exhibited by bean seeds is?

1. Epigeal 
2. Hypogeal 
3. Hypocotyls 
4. Tap root 
5. Epicotyl. [       ]

(vii) A patient has been diagnosed with high level of blood sugar, which hormone would you recommend to regulate the victims’ sugar._____________________ 

1. Glucagon 
2. Insulin 
3. Aldosterone 
4. Testosterone 
5. Ant diuretic hormone [       ]

(viii) The wings of ostriches and penguins, the reduced pelvic girdle and hind limbs of whale and pythons and the reduced coccyx in the human are referred as;

1. Analogous structure 
2. Vestigial structure 
3. Divergent structure
4. Convergent structure 
5. Homologous structure [       ]

(ix) When students were conducting private study at right, lights went off suddenly.

Which of the following changes occurred in the eyes of the students?____

1. The lens become thicker 
2. The pupils become large 
3. The ciliary muscle relaxed
4. The lids closed 
5. The eyes opened wider [       ]

(x) One student was observing the plant cells by using light microscope in the biology laboratory. Unfortunately the image viewed from microscope was not clear. Do you think which part of microscope he has to adjust to allow the microscope tube to move up and down by tiny amounts as to change the focus and see the plant cell clearly?

1. Rotating nosepiece 
2. Fine adjustment knob 
3. Eye piece lens 
4. Objective lens
5. Hinge screw [       ]

2. Match the items in LIST A with the responses in LIST B by writing the letter of the corresponding responses beside the item number.

SECTION B: (54 MARKS )

Answer all questions from this section

3 (a). Makoke is a civil engineering student at certain university. He is doing a research at your school for the construction of a good laboratory. As a student, explain four qualities he must consider when constructing a good laboratory.

(b) While walking to home Jilulu was bitten by a snake. She was given an immediate care before she was sent to hospital.

(i) What name is given to an immediate care given to Jilulu?

(ii)Why do you think is important to do so? Mention any four points

4. Kipendawatoto and his family during the holiday he visited Mikumi national park and on moving around the park, the following organisms were observed; Zebra, giraffe, lion, grasses, mushroom, hyena and antelope.

(a) Construct two (2) food chain from the organisms observed in the national park

(b) Construct a simple food web.

(c) Identify organism(s) which are

1. Producer (s)
2. Secondary consumer(s)
3. Decomposer

5. A form three students in a practical session were provided with a skeleton to observe and they were required to describe all movable joints on it and explaining how muscles found on the arm bring about bending and straightening of the arm. If it were you, how would you report on that?

6 . (a). Draw a diagram of maize cell and label the parts responsible with the following functions.

1. Control all activities of cell
2. Provide shape of the cell
3. Chemical reactions occurs

(b). How maize cell differ from goat cell ( three points ).

7. (a). A flower was found to have conspicuous petals, scented and firmly held stigma and anthers.

(i). What is likely agent of pollination of the flower?

(ii). What is the significance of firmly held stigma in the flower?

(b). Briefly explain the role of the following structures in the flowers.

1. Petal
2. Stigma
3. Ovary
4. Style
5. Anther.

8. (a) Explain why

(i) The rate of breathing increase quickly during exercise?

(ii) Is better to breathe through nose than through the mouse

(b) How are respiratory surfaces adapted to their role? (Give 5 points)

SECTION C: (30MARKS)

Answer two (2) questions from this section

9. Majority of people believe that all fungi are harmful organisms. As a biologist, explain six ways in which fungi are beneficial to human being.

10. Youth now days are hardly dominated by various risky sexual behaviors such as gays, homosexuality and masturbation which are hardly destructing their reproductive health. As young biologist, explain any three causes of risks sexual behaviors and any three effects to our societies

11. In an experiment, variety of bean seeds having Red seed coats were crossed with whiteseed coated beans; all the beans seed obtained in F1 generation had Red seed coats. Then the F1 generations were selfed and F2 generation contained total of 7324 seeds.

(a) Using appropriate genetic symbols work out the genotype of F1 generation and genotype of F2 generation.

(b) From the information above, work out the following relying on F2 generation

1. Genotypic ratio
2. Phenotypic ratio
3. Total number of Red seeds
4. Find the percentage of white and Red seeds

PRESIDENT'S OFFICE

REGIONAL ADMINISTRATION AND LOCAL GOVERNMENT

MOROGORO FORM TWO REGIONAL ASSESSMENT 

BIOLOGY

CODE: 033

TIME: 2:30HOURS                                                                   YEAR: 2023

INSTRUCTIONS

1. This paper consists of section A, B and C with a total of ten (10) questions

2. Answer all questions in section A, B and C

3.   Section A carries fifteen (15) marks, section B seventy (70) marks and section C carries fifteen (15) marks.

4.    Use the space provided in each question to write your answers

5.    All  your writing must be in blue or black ink except drawing which must be in pencil

SECTION A (15 MARKS)

1. For each of the following items (i)- (x) the most correct answer from among the given alternatives and write it's letter in the box provided.

(i) Mtibwa sugar football team's goalkeeper fell down during the match due to the muscle cramps, which component of the first aid kit will you use to give first aid?

A. Vaseline         C. Liniment     B. Spirit           D. Scissors

(ii) A structure which encloses and protect the inner parts of a cell is called

A.  Cell wall          C. Nucleus

B.  Chloroplast      D. Cell membrane

iii) Medical waste is described as

A. Biohazardous                C. Biodegradable

B. Renewable materials     D. Recyclable

iv) Which of the following organisms are the members of Kingdom Protoctista?

A.      Bacteriophage and paramecium

B.      Euglena and yeast

C.     Plasmodium and amoeba

D.      Bacteria and trypanosome

v)  The following are the by-products of photosynthesis process

A.  Carbon dioxide and carbohydrates

B.  Carbohydrate and oxygen

C.  Carbon dioxide and water

D.  Carbon dioxide and oxygen

vi)  A term  describes organisms with similar nutritional habits is known as

A.   Community        C. Trophic level

B. Food chain           D. Food web

vii) A form two student found an organism shaped as an umbrella in a damping place. Which of the following is true about the organism?

A. It is mushroom and belongs to phylum Ascomycota

B. It is yeast and belongs to phylum Basidiomycota

C. It is a mushroom and belongs to phylum Basidiomycota

D. It is a mucor and belongs to phylum Ascomycota

viii) The part of alimentary canal which rolls chewed food into bolus is called

A.  Plasrnolysis   C. Pharynx

B.  Tongue           D. Esophagus

ix)  The following are the importance of natural environment except

A.  Provide shelter to organisms

B.  Provide security for organisms

C.  Providing an appropriate setting for interaction

D.  Act as a source of hunger for organisms to eat.

x)  A communicable disease which affects a large number of people in a given locality referred as

A.  Epidemic         C. Endemic

B.  Sporadic           D. Pandemic

2. Match the phrase in list A with response in list B by writing the letter of the correct response.

SECTION B (70 MARKS)

Answer all questions from this section.

3.  a) Study the diagram below and answer the questions that follows,

i) Give the names of the part labelled in the diagram above

ii) State one function of each part you have named in (i) above.

b) Explain what will happen if the following are removed from a plant or an animal cell.

i)         Nucleus

ii)       Cell wall

iii)    Chloroplasts

4. a) What reasons would you give to your young sister who is in standard seven to inspire that she should have to study as she dreams to scientist? Use four reasons

b) Give four reasons that you can tell your friends a cat is a living things

5. Form two students performed an experiment to determine food substance contained in a sample G. They took 2cm ³ of sample G into a test tube. They added equal volume of sodium hydroxide followed by three drops of copper 2 sulphate solution. A purple coloration Was observed.

a)       Which food substance present in sample G?

b)      State two (2) functions of the food substance that was present in sample G.

c)        Name the parts of alimentary canal in which food present in G is firstly digested

d)        Identify two (2) natural sources of food substance contained in sample G

e)        Give two (2) disorders of food substance contained in sample G when it is insufficient in children

6. A bread was put in a wet cupboard. After few days black thread like structures which ended up in a club like structures appeared in the bread.

a)   Write the common name of the organism that grew on the bread surface

b)   Name the Kingdom and phylum in which the observed organism belongs

c)   Outline four (4) advantages of the members of the Kingdom you mentioned in (b) above

7.    Mr Kazimoto was experiencing diseases frequently, he feared that he might be infected with HIV, he went to the hospital for medical checkup but the results were HIV negative, the doctor told him that his immunity was lowered. Explain to Mr. Kazimoto the possible cause that lowered his body immunity. (Five points)

8.     Rehema was suffering from prolonged malaria, when she was taken to the hospital the doctor realized that she had severe anaemia as most of her red blood cells were destroyed by malaria parasites, hence she was in need of immediate blood transfusion. The doctor determined that Rehema's blood group was AB+.

(i) Draw the table to show the compatibility of the known blood groups

ii. From the table in (i) above identify the blood groups that can donate blood to Rehema

iii. State two precautions that to be taken by the medical personnel before Rehema undergo blood Transfusion

iv. Why is blood transfusion being important (give two reasons)?

9. a) Explain one (1) role played by the following substances in digestion a

i) Bile

 ii) maltase enzyme  

iii) Hydrochloric acid

b) How do animals like human beings benefit from the process of photosynthesis occurring in plants.

SECTION C (15 AR'S)

Essay question. Answer question 10 

10.The weather forecasting department announced that there will be drought season the coming year because of low rainfalls. he people in the community were alerted to preserve food so that it can save them during drought season, you as a form two student with the knowledge of food preservation, educate the people in your community on how to preserve food locally.

THE UNITED REPUBLIC OF TANZANIA

DODOMA REGION 

FORM FOUR MOCK EXAMINATION

033/1                                              BIOLOGY 1

TIME:  3 Hours                                                                 August, 2023

Instructions

1.      This paper consists of section A, B and C 

2.      Answer all questions in section A & B and only two (2) questions in section C

3.      Write your examination number on each page of your answer sheet provided

4.      Except for the diagrams which must be drawn by using pencils and labeled in INK all writing should be in BLUE / BLACK pen

SECTION A (16 MARKS)

Answer all questions in this section 

1.      You are given the items (i) – (x) choose the most correct answer among the given alternatives and write its answer against its item number 

(i) Hypertonic and hypotonic solution differs in that 

A.    Hypertonic has high water potential and hypotonic has low water  

B.    Hypertonic loses water and hypertonic solution absorbs water 

C.     Hypertonic has low water and hypotonic has high water potential 

D.    Both hypertonic and hypotonic solution has equal water potential 

E.     Both absorbs water 

(ii) A food sample which was tested by boiling with benedict solution gave an orange precipitate. This showed that the food sample contained,

A.    Reducing sugar        D. Protein

B.     Fat    E. Non reducing sugar

C.     Sucrose

(iii)The glomerular filtrate contains the following materials 

A.    Glucose molecules, water, urea and dissolved mineral salts 

B.     Cells, proteins and glucose 

C.     Uric acids, proteins and urea 

D.    Vitamins, urea and water 

E.     Mineral salts, proteins and glucose 

(v)    The proper methods of disposing biohazardous wastes is 

A.    Burying        D. Feeding animals

B.     Incineration    E. Pit latrines 

C.     Recycling 

(vi)   Which of the following part of germinating seed is an embryonic shoot?

A.    Hypocotyl    D. Epicotyl 

B.     Radicle         E. Cotyledon

C.     Plumule

(vii)  The feature of the leaves which differentiate monocotyledonae from dicotyledonae are; -  

A.    Monocotyledonae have narrow leaves with network venation 

B.     Dicotyledonae broad leaves with parallel venation  

C.     Both have broad leaves and network venation 

D.    Monocotyledonae have narrow leaves and parallel venation 

E.     Dicotyledonae narrow leaves and network venation 

(viii)  The part of the ear which convert sound signals into nerve impulses which are transimitted to the brain includes;

A.    Ear ossicles

B.     Semicircular canal

C.     Cochlea

D.    Eustachian tube 

E.     Ear drum

(ix)  Steady state theory of origin of life states that; -

A.    The universe has always existed and has no origin 

B.     The universe was created by supernatural power called God 

C.     Living things originated from non-living organisms 

D.    The universe was formed due chemical composition 

E.     All species here on earth arrived from different planets in universe

(x)   The part of a compound microscope which helps to concentrate light to the object under observation is 

A.    Ocular tube  D. Mirror 

B.     Condenser    E. Diaphragm  

C.     Revolving nosepiece

(xi)  Mutual interactions between two species are described by which of the following characteristics?  

A.    Both live as parasite 

B.     Both may be harmed

C.     Both benefit and flourish

D.    One is harmed and another benefit

E.     Both neither benefit nor harmed  

2.      Match the items from LIST A with the correct phrase in LIST B by writing the letter of the correct response from LIST B against the item number in LIST A 

SECTION B (54 MARKS)

Answer all questions in this section 

3.      (a) Distinguish between homologous structures and analogous structures with specific examples.

 (b) Name the type of evolution exhibited by comparing;

(i)     Flippers of whale and forelimb of desert rat

(ii)  Wings of a bat and wings of a butterfly

(iii)Forelimbs of human and that of tiger

(iv) Wings of flamingo and wing of an insect

4.      (a) Give three factors that aid ultrafiltration in glomerulus.

(b) Give explanation to the following

(i)     Plasma protein are absent in glomerular filtrate

(ii)  Urine of a normal person does not have glucose.

(iii)  During cold days, one produces large quantities of dilute urine. (c) State 3 adaptations of proximal convoluted tubule to re-absorption.

5.   (a) (i)Define the term mitosis

 (ii)Outline the significance of mitosis to organisms

(b)  Define the following terms and give an example of organism where each takes place

(i)     Complete metamorphosis

(ii)  Incomplete metamorphosis

(iii)Ecdysis

6.      (a) state any three adaptations of the leaf for photosynthesis 

(b) How do the following factors affect the rate of photosynthesis? 

(i)     Chlorophyll

(ii)     Sunlight  

(iii)    Carbondioxide

7.      In a legal dispute, two families of Ali and Rao pinto both claimed to have sired a girl by the name Leila whose blood group was determined to be AB. Ali was established to have blood group A and his wife blood group O. Rao pinto had blood group A and his wife has blood group B. Determine which family is the likely biological parents of Leila. Show your working.

8.      (a) During cooking, a cook unfortunately touched a hot burning charcoal. He pulled his hand abruptly.

(i)     What is the name of that response 

(ii)  What is the name given to the pathway which describes the response in 8a (i) above 

(b) Illustrate the pathway of an impulse from the sense organ to effectors of the cook’s hand

                                          SECTION C (30 marks)

Answer only two (2) questions in this section. 

9.      With a well labeled diagram explain clearly how the gaseous exchange occurs across the alveolus.

10.  Write an essay to explain (5) advantages and three (3) disadvantages of coniferophyte

11.  Describe how the following method of family planning works.

(a)   Implants 

(b)   Rhythm (calendar) method 

(c)   Coitus interruption (withdraw) 

(d)   Condom 

(e)   Diaphragm 

THE UNITED REPUBLIC OF TANZANIA PRESIDENT'S OFFICE REGIONAL ADMINISTRATION AND LOCAL GOVERNMENT

FORM FOUR REGIONAL MOCK EXAMINATION 

TABORA REGION

033/1 BIOLOGY -1

(For Both School and Private candidate)

Time: 3 Hours Wednesday, May 10, 2023, a.m.

INSTRUCTIONS

1. This paper consists of three sections A, B and C with a total of eleven (11) questions.
2. Answer all questions in sections A and B and any two (02) questions from section C.
3. Section A carries sixteen (16) marks, section B carries fifty four (54) marks and section C carries thirty (30) marks.
4. All writings should be in blue or black ink except for drawings/diagrams that pencil must be used. .
5. Cellular phone and any unauthorized materials are not allowed in the examination room.
6. Write your Examination number on every page of your answer booklet(s) provided.

SECTION A: (16 MARKS)

Answer all questions in this section.

1. For each of the following items (i) — (x), choose the most correct answer from the given alternatives and write its letter beside the item number in the answer booklet provided.

(i) If you accidentally swallow a poison, you are advised to take a glass of milk because the milk . . . . . . . . . .

1. Induces vomiting
2. Neutralizes poison
3. Relieves pain
4. Prevents shock
5. Gives the appetite

(ii) The type of muscles that make the heart is

1. Triceps
2. Biceps
3. Cardiac
4. Voluntary
5. Involuntary

(iii) A respiratory surface in fish is . . . . . . . . . . .

1. Spiracles
2. Fins
3. Gills
4. Operculum
5. Lungs

(iv) Which of the following part allows water to enter into the seed before germination? 

1. Testa
2. Plumule
3. Radicle
4. Cotyledon
5. Micropyle

(v) The offspring of crosses between red petaled and white petaled flowering plants are always found to be pink. This is example of

1. Cross over
2. Incomplete dominance
3. Codominance 
4. Recessive dominant
5. Complete dominant

(vi) A person who is riding a bicycle can waste a lot of water through sweating. Which of the following organ is responsible for the water loss

1. Stomach
2. Kidney
3. Liver
4. Skin
5. Lungs

(vii) Handling of waste differs according to the type of wastes a person deals with; the medical wastes are described as

1. Infections wastes
2. Biohazardous
3. Re-usable
4. Biogradable
5. Recyclable

viii. During reproduction male and female gametes fuse together to form a new offspring of their kind. In human, sperms usually have the following genotype. 

1. XX
2. X
3. XY
4. YY  
5. XXYY

ix. Human and Ruminants possess stomach for digestion of food substances, which among the following is a true stomach in Ruminants?

1. Rumen 
2. Ileum 
3. Rectum
4. Abomasums
5. Omasum

x. Which of the following statement represent sense organs?

1. Tongue, skin, liver, kidney and nose
2. Tongue, nose, skin, eyes and ear.
3. Tongue, mouth, skin, eyes and ears.
4. Tongue, pancreas, eyes, nose and ears.
5. Tongue, mouth, eyes, skin and ears.

2. Match the responses in List B with the word/phrases in List A by writing the letter of the correct response beside the item number in the answer booklet provided.

SECTION B: (54 MARKS)

3. (a) Human being makes observation by using sense organs. Identify the sense organ that could help you observe if a coconut is:

1. Round 
2. Rough
3. Sweet 
4. Smelling nice

(b) Observe the following figure of human being and then answer the questions that follow question

1. State the name of hormone glands labeled, A, B, C,D and E
2. What is the function of hormone secreted from each glands labeled A, B, C, D and E.

4. (a) We as animals use muscular movement that is made by contractions and relaxation of muscles. Name the structures used for movement in the following organisms

1. Amoeba 
2. Paramecium 
3. Euglena

(b) By using five points, briefly explain why human being need skeleton

5. In his tour Mr. Songambele saw a zebra eating grasses, later on he saw a lion chasing that zebra in order to eat.

(a) (i) Identify the feeding relationship

(ii) State the meaning of feeding relationship, mentioned in 5(a) (1) above.

(b) (i) Construct a sensible food web from the given organisms Grasses, Shrubs, Zebra, Antelope, Giraffe, Hyena, Lion and bacteria

(ii) What are roles of bacteria in food web above.

6. (a) (i) Make one difference between Mitosis and Meiosis

(ii) Draw the diagram to illustrate metaphase stage of Mitosis

(b) Mitosis is very important biological process in living things. Write 5 roles of mitosis in living things.

7. (a) Natural vegetative propagation has several numbers of forms. Write the common examples of plants that, use the following forms

(i) Bulb (ii) Rhizomes (iii) Corms

(b) Carefully study the diagrams of human female reproductive belong and then answer the following questions

1. State the name of hormone glands labeled, A, B, C,D and E
2. What is the function of hormone secreted from each glands labeled A, B, C, D and E.

8. (a) The father of Genetic Mr. Mendel preferred to use garden peas rather than other plants. Give four reasons why he preferred to use pea plant

(b) Monica is homozygous short but her husband is heterozygous tall. What will be the phenotype and genotype of their offspring?

SECTION C: (30 MARKS)

Answer only two questions in this section. Each question carries 15 marks.

9. A child complains to her mother that she has a headache and pain in joints. She also feels uneasy vomits and abdominal pain. Her mother also realizes that the child has a fever. She takes her to hospital. By using the following guidelines, write an essay to explain.

1. The name of disease
2. Causative agent
3. Mode
4. Preventive ways of disease
5. Examples of medicine that can be used to treat diseases.

10. It is true without any doubt that "Biology will be never stand alone". Verify this statement by four points.

11. Lungs are the ones among the respiratory surface used by animals: What are the common adaptive features of the lungs to perform its function?

THE UNITED REPUBLIC OF TANZANIA, PRESIDENT’S OFFICE, REGIONAL ADMINISTRATION AND LOCAL GOVERNMENT

KILIMANJARO REGION MOCK FORM FOUR EXAMINATION

CODE: 033/1 BIOLOGY 1 

 TIME: 3:00 HOURS MAY 2023

INSTRUCTIONS.

1. This paper consists of three (3) sections, A, B and C
2. Answer all questions in section A and B and two questions from section C.
3. Except for diagrams that must be drawn in pencils, all writing must be in blue or black ink.
4. Cellular phone and any unauthorized materials are not allowed in the examination room
5. Write your examination number on every page of your answer booklet(s).

SECTION A (16 Marks)

I For each of the items (i) - (x), choose the most correct answer from the given alternatives and write its letter beside the item number, 

i. In the hospital it was found that a person is universal recipient, the patient has: 

1. Antigen B and antibody a.
2. Antigen B and antibody a and b.
3. No antigen and antibody a and b 
4. Both antigen A and B and no antibody 
5. No antigen and antibody a

ii, If the magnifying power of the eye piece lens of the compound microscope is X 10 and that of the high power objective lens is X 40, What is the magnification of a specimen under observation? 

1.  X10
2.  X5000
3.  X400
4.  X50
5.  X40

iii.Whåt does selective breeding means as used in genetics?

1. Only pure stock should be inbred.
2. The parents are chosen to produce desired offsprings,
3. The encouragement of outbreedinge
4. The parents are chosen carefully.
5. The offsprings are like parents.

iv. Why are the Bryophytes the most primitive plants on earth?

1. They grow on wet areas
2. They do not produce seeds
3. They reproduce sexually
4. They reproduce asexually
5. They lack vascular tissues

v. The function of hydrochloric acid in food testing experment is;

1. To decolourize food sample
2. To oxidize the food sample
3. To hydrolyze complex sugar to simple sugar
4. To test reducing sugar
5. To neutralize sugar foods

vi. Asha went to Serengeti breweries to see how beers and other brewers are made, What biological principle do you think they are using in making beers?

1. Saprophytism
2. Decomposing
3. Aerobic respiration 
4. Anaerobic respiration 
5. Parasitism

vii. A cell membrane is said to be flexible and semi- permiable, this means: 

1. Liquids passing through it
2. Small solid can pass through it.
3. Only certain substances pass through it
4. Semiliquid pass through it
5. Some gases pass through it

viii. Structures with common ancestral origin but different functions are called:

1. Vestigial structures
2. Analogous structures
3. Homologous structures 
4. Rudimentary structures 
5. Axial structures

ix. Which of the following set is found in plant cells but not in animal cells?

1. Cellulose cell wall, permanent vacuole and chloroplasts
2. Cell membrane, chloroplasts and nucleus
3. Chloroplasts, sap vacuole and nucleus
4. Sap vacuole, cell membrane and cellulose cell wall.
5. Chloroplasts, vacuole and cell wall.

x, In human circulatory system valves is very vital as it helps the following function among the given alternatives.

1. Permit blood to circulate rapidly
2. Prevent blood from moving too rapidly
3. Prevent blood from flowing in a wrong direction
4. Stop circulation whenever necessary
5. Prevent blood clots

2. Match the descriptions in list A with the corresponding terminologies in list B by writing the letter of the correct response besides the item number in the answer sheet or booklet provided.

SECTION B (54 Marks)

Answer all questions in this section

3. (a) Every secretion in the body has its own purpose, nose secrets mucus, mouth secrets saliva and eyes secret tears. What do you think be the rea}on for;

1. Nose to secret mucus.
2. Eyes to secret tears.
3. A mouth to secret saliva.

(b)Explain three points why we are advised to boil drinking water?

( c) contrast between plants found in monocotyledonae and those in dicotyledonae. Give three points.

THE UNITED REPUBLIC OF TANZANIA, PRESIDENT’S OFFICE, REGIONAL ADMINISTRATION AND LOCAL GOVERNMENT

MVOMERO DISTRICT COUNCIL

TAHOSA PRE MOCK EXAMINATION MAY 2023 

FORM FOUR BIOLOGY.

TIME: 3HRS

INSTRUCTIONS

1. This paper consists of sections A, B and C with total of 11questions.
2. Answer all questions in section A and B, and two questions from section C.
3. Section ‘A’ carries 16 marks section B carries 54 marks and section C carries 30 marks.
4. All writing should be in blue or black pen, except for diagrams that must be drawn in pencil.
5. Cellular phones and unauthorized materials are not allowed in the examination room
6. Write your name or examination number on every page of your answer sheet.

SECTION A (16 marks)

Answer all questions

1. For each of the items (i-x) choose the best answer form among the given alternatives and write its letter beside the item number in the answer booklet provided.

i) The following problems can be caused by burning plastic waste materials

1. Heart pains
2. Skin rashes
3. Breathing problems
4. stomach ache
5. Joint problems

ii) The active transport of food substances against the concentration gradient in a cell of a living organism is aided by 

1. Pressure
2. Blood sugar level
3. Energy
4. Temperature
5. Force

iii) The square wooden or metallic grid used for estimating the population of organisms in area 

1. Sweep nets
2. pouter
3. quadrat
4. motor and pestle
5. specimen bottle

iv) Which one of the following is correct order of events?

1. Fertilization → Implantation → Ovulation
2. Ovulation → Fertilization → Implantation
3. Implantation →Ovulation → Fertilization
4. Ovulation → Implantation → Fertilization
5. Fertilization → Ovulation → Implantation

v) Ferns are vascular plants like other higher Plants, but in some extent they differ. How ferns differ from higher plants?

1. Ferns lacks xylem and phloem
2. Ferns have seeds
3. Ferns reproduces by means of spores
4. Fen feed on dead and decayed matters
5. Ferns have no true roots, leaves and stem

vi) Food sample was mixed with dilute sodium hydroxide and then mixed with copper II sulphate solution, then the mixture was shaken well and left to settle and color changed to purple o violet pink. This implies that 

1. Starch was present
2. Protein was absent
3. Vitamin was present
4. Protein was present
5. Lipids was not present

vii) During cold weather shivering occurs in a mammalian body in order to;

1. Shake off coldness
2. Produce sweet
3. Relax the muscles
4. Generate heat
5. Prevent heat

viii) The cross between a hybrid with any individual with similar genetic make up to it’s parent is known as;

1. Test cross
2. Back cross
3. Test cross and back cross
4. Variation
5. Mutation

ix) The special creation theory states that;

1. Living things arose from nonliving things
2. Life has no origin
3. Life an earth was brought from outer space in form of spore
4. Life arose on earth due to physical and chemical traction
5. The earth and all organisms were created in their present form by God.

x) HIV weakens the immune system by destroying a specific type of blood cells called

1. CD4
2. T- helper cells
3. Red blood cells
4. Erythrocyte
5. HIV cells

2. Match the items in list “A” with those corresponding in list “B” by writing the letter of the correct response beside the item number in the answer booklet provided.

SECTION B (54 marks)

Answer all question

3. a) What are the differences between the following terms

1. Digestion and ingestion
2. Peristalsis and egestion

b) Explain five features which aid the ileum to perform its functions during digestion.

4. a) With the aid of the diagram, explain the differences between hypogeal and epigeal of germination.

b) Mr. Shaba sown some seeds on his garden but those seeds failed to geminate despite of all necessary conditions provided. He decided to ask for an advice from agricultural officer, then the officer said those seeds were dormant. Outline four factors that cause seed dormancy.

5. a) Write short notes on the following terms:

1. Food chain
2. Food web
3. Habitat
4. Biotic factor
5. Abiotic factor

b) Construct a food web from the given organisms: Grasshopper, rabbit, grass, Snake, bacteria and vulture.

6. a) An accident occurred at Mtakuja village, MR. Zuma and the fellows helped the injured people by covering up their wounds, and keeping them calm , then they sent them to the hospital. What were the four necessities of Mr. Zuma’ s actions?

b) Mention and give functions to five components of first aid kit.

7. a) Why translocation and transpiration processes important to the life a plant? give two reasons

b) Explain with diagram, what will happen to a plant cell when placed in hypertonic and hypotonic solutions.

8. In an experiment, a variety of garden peas having a smooth seed coat were

Crossed with a variety having a wrinkled seed coat. All the seeds obtained in the F1 had a smooth seed coat. The F1 generation was selfed.

i) Work out for the genotypes of F1.

ii) What are the genotypic and phenotypic ratio of F2.

SECTION C (30 MARKS)

Answer only two questions

9. Mwajuma Ndalandefu went to Mtakuja health Centre complaining having severe stomach ache, vomiting and frequent diarrhea (rice water like feaces). The doctor diagnosed her with a certain disease.

1. What is the name of the disease?
2. What is the cause of disease?
3. Name two ways of transmission
4. List four preventive measures
5. What is the effect of the disease to human body?

10.i. Samiliana was making some tea for her mother. She accidentally touched the pan while switching off the stove. She pushed away the pan and poured all the tea.

a) What action did Samiliana exhibit?

b) Give the meaning of the action, mention other two examples of the action

c) How useful is such an action to organisms. ii. Shortly explain the mechanism of hearing in human

11. Arthropoda is a group of organisms that is said to be successfully among all other organisms. Explain by giving four reasons

PRESIDENTS OFFICE REGIONAL ADMINISTRATION AND LOCAL GOVERNMENT

COAST REGION 

FORM FOUR SECONDARY EDUCATION MOCK EXAMINATION

Code: 033/1 BIOLOGY

(For Both School and Private candidates) 

Time: 3 Hours 

INSTRUCTIONS

1 . This paper consists of section A, B and C with a total of eleven (11 ) questions

2. Answer all questions in section A and B and two (2) questions from section C.

3. Section A carries sixteen (16) marks, section B carries fifty four (54) marks and section C carries thirty (30) marks.

4. All writings must be in blue or black ink except drawings which should be in pencil.

5. All communication devices, programmable calculators and any unauthorized materials are not allowed in examination room.

6. Write your examination number on every page of your answer sheet(s).

SECTION A (16 marks)

Answer all questions in this section

1 . For each of the item i-x choose the correct answer from among the given alternatives and write its letter beside the item number in the given answer sheet.

i. The skin can be described as multipurpose organ because beside of being an excretory and touch reception organ. What else is among the roles played by the skin in mammals?

1. Organ for vitamin B formation
2. Sound reception organ
3. Temperature controlling organ
4. It is an organ of corti

ii. During an experiment a student observed a cell with distinct cell wall, a flagella and nucleus materials scattered on the cytoplasm, The organism was obtained from which kingdom?

1. Animalia
2. Plantae
3. Fungi
4. Monera

iii. Decide on the safest way to help sheikh Kipozeo with hiccup problem for almost 8 hours since morning time.

1. By letting him to breath into paper bag
2. By letting him to breath in plastic bag
3. Nose pinching and breath through mouth
4. Applying a cold compress to the persons chest

iv. What is wrong with generic name and specific in the name mangiferalndica as the scientific name of mango plant?

1. Genus name is capitalized
2. Species name is in small letter
3. Genus name is in small letter
4. Genus name begin with small letter.

v. Identify the number of chromosomes in dogs reproductive cell obtained by form IV students after allowing the cells to undergo meiosis process.

1. 78 before meiosis, 29 chromosomes after meiosis 
2. 39 before meiosis, 79 chromosomes after meiosis
3. 78 before meiosis, 39 chromosomes after meiosis
4. 76 before meiosis, 39 chromosome after meiosis

vi. Select the good advice on how to deal with electronic wastes in rural and urban places for the betterment of present and future generation.

1. They should get buried under the ground
2. They should be burned in rubbish pits
3. They should be given to street electronician
4. They should be recycled into other products

vii. Honey sample was given to form IV students in biology laboratory. What do you think are the sense organs that they will use to observe the sample?

1. The tongue and eye only
2. The eye, tongue and mouth only.
3. The tongue, skin, nose and eyes only
4. The tongue, nose and eyes only

viii. Chickens have gizzard along their alimentary canal, propose on the similar part of human alimentary canal, which perform the same function like the way gizzard is used in chickens alimentary canal.

1. The appendix 
2. The ileum
3. The gall bladder 
4. The salivary glands

ix. Darwin the famous evolutionist suggests that the today complex organisms arose from simple organisms of the past. Choose the best example to relate with Darwins suggestion in evolution.

1. Development of giraffes long neck
2. Development of webbed toes in aquatic birds
3. Extinction of limbs in snakes
4. Variation and natural selections in organism

x. Winston the cardiologist listed some adaptation of the heart to its function. Which adaptation you think is incorrect basing on your knowledge on structure of the heart?

1. Cardiac muscles contract and relax without getting fatigue
2. Valves prevent blood flow in one direction
3. Pericardial fluid prevent friction as heart beats
4. Septum prevents mixing of blood.

2. Match the phrases in list A with their correct responses in list B by writing the letter of the correct answer.

SECTION B (54 Marks)

Answer all questions in this section

3. During biology experiment, Annie used a cracked beaker. As she was washing, it broke and cut her finger deeply.

i. Which laboratory rule did she break?

ii. Name any six (6) first aid items you may need so as to render first aid to Annie. iii. List the procedures you will follow to provide first aid to Annie.

4. Growth process in multicellular organism is necessary and inevitable. It involves the particular kind of cell division.

a) Identify and give the meaning of cell division responsible for growth.

b) Is there any significance of the above named cell division to growth? (4 points).

c) What are the three factors that jn no way out they affect rate of growth and development in human being.

5. For the pathogens to bring their effect in human body it is not an easy task. Verify this statement by naming any six parts of human body then state how these parts they defend the body from being infected by pathogens.

6. As Amina was quietly revising in her room, she was distracted by loud ringing of her phone. Describe the role played by parts of Aminas ear to ringing sound. (Any six points).

7. Imani was exercising long marathon during a hot day. He sweats a lot. When he felt thirsty he sat down on a rock and opened his back pack intending to drink some water. Unfortunately he had forgotten to fill his bottle.

a) Describe the mechanism which will be used to regulate water content in Imanis body until he reaches a place where he can drink water.

b) Explain why Imani may not urinate until he drinks water.

8.(i) Use your biological knowledge to explain the following biological arguments;

a) Why fungi are classified in both as plants and also as animals.

b) Why most of Bryophytes do not grow tall but are short and spread out? 

c) Why viruses are obligate parasite?

(ii) With examples to each mention any three movable joints found in mammalian skeleton

SECTION C (30 Marks)

Answer only two (2) questions from this section.

9. (A) When a fruit fly with black wings was crossed by a fruit fly with red wings, all the Fl had black wings.

(i) Show diagrammatically the result of F2 generation if Fl flies are allowed to self breed.

ii. If total number of fruit flies F2 were 4264 what will be the number of;

a) Fruit flies with black wings

b) Fruit flies with homozygous red wings

c) Fruit flies with heterozygous black wing

(B) Genetic is the branch of biology dealing with heredity. How can this field of biology be applied to everyday life. (3 points).

10. A five years boy was diagnosed with a tropical protozoan disease that is characterized by high fever, frontal headache, joint pain and loss of appetite. Write an essay about the disease the boy is suffering from showing:

1. Causes
2. Transmission mode
3. Effects
4. Prevention (any 4 points).

11.(a) How ABO system is applied in human blood classification.

(b) Mr. Juma, a Rhesus positive man married a Rhesus negative woman. After the birth of their first born, they experienced a lot of still birth from next conceived pregnancies. This was happening due to mass destruction of foetal red blood cells; 

i. Why the red blood cells of the foetus get destructed 

ii. Name the disease that found in the foetus 

iii. Suggest the possible treatment for the named disease.

THE UNITED REPUBLIC OF TANZANIA PRESIDENT'S OFFICE REGIONAL ADMINISTRATION AND LOCAL GOVERNMENT 
TANGA REGION

FORM FOUR MOCK EXAMINATION 2023

033/1 BIOLOGY

(For both School and Private Candidates)

TIME: 3 HOURS MAY 2023

Instructions

1. This paper consists of sections A, B anal C with a total of eleven (11) questions
2. Answer all questions in section A and B and two (2) questions from section C.
3. Section A carries sixteen (16) marks, section B fifty-four (54) marks and section C carries thirty (30) marks.
4. All writings should be in blue or black pen, except for diagrams that must be drawn in pencil.
5. Cellular phones and any unauthorized materials are not allowed in the examination rooms.
6. Write your Examination number on every page of your answer booklets.

SECTION A (16 Marks)

Answer all questions in this section

1. For each of the i - x, choose the correct answer from among the given alternatives and write its letter beside the item number in the answer booklet.

(i) A form two student found an organism shaped as an umbrella in a damping place.

Which of the following statement is true about the organism;

1. It is a mushroom and belongs to Phylum Ascomycota
2. It is yeast and belongs to Phylum Basidiomycota.
3. It is a mushroom and belongs to Phylum Basidiomycota.
4. It is a breadmould of Phylum Zygomycota
5. It is a Mucor of Phylum Ascomycota.

(ii) Which of the following cell structures is the site for production of energy in plants?

1. Ribosomes
2. Mitochondria
3. Chloroplast
4. Nucleus
5. Vacuole

(iii) Which part in testis is concerned with production of reproductive cells?

1. Sperm duct
2. Epididymis
3. Scrotum
4. Seminiferous tubules
5. Vas deferens.

(iv) The method of waste disposal that involves burning of something until it is completely destroyed is called:

1. Incineration
2. Recycling
3. Disposing
4. Sanitating
5. Reusing 1

(v) A person of blood group O⁺ can donate blood to persons of blood group A⁺, B⁺, AB⁺ and O⁺. The reason for this is because blood group O⁺ ;

1. Has no antigens to stimulate the recipient's antibodies
2. Has no antibodies to stimulate the recipient's antigens.
3. Has a lot of blood most of the time
4. Has only Antigen A.
5. Has only Antibodies B.

(vi) The diploid (2n) state of a human cell is 46 chromosomes. Which of following statements is true about the gametes produced from that cell?

1. They will be diploid and identical to the parent cell
2. They will be haploid and identical to the parent cell
3. They will be diploid and different from the parent cell
4. They will be haploid and different from the parent cell
5. They will not change.

(vii) Why salivary amylase can work only in the mouth not in the stomach?

1. The alkalinity in the stomach is not a favourable medium to work on it.
2. In the stomach it become too diluted. -
3. The acidity in the stomach contents is not a favourable medium to work on it.
4. There is no digestion since stomach stores food temporally.
5. Bile from the gall bladder interfere with its functions.

(viii) The mammalian eye is made up of several parts. Which of the following control the shape and curvature of the lens?

1. Iris
2. Ciliary body
3. Conjunctiva
4. Stispensory ligaments
5. Pupil

(ix) A patient complained to a Doctor that he always suffers from the following; pains and difficulty during urinating, back pain, nausea and vomiting, chills and fever and blood in urine. The patient is probably suffering from:

1. Gout 
2. Yellow fever 
3. Urinary tract infection
4. Hepatitis 
5. Kidney stones.

(x) Which of the following actions regulates temperature in mammals;

1. Sweating, shivering, swimming and urinating
2. Shivering, vasodilation, sweating and vasoconstriction
3. Conduction, radiation, convection and swimming
4. Vasodilation, swimming, sweating and bathing
5. Swimming conduction, convection and radiation.

2. Match the parts of a flower in list A against their functions in List B and write the letter of the correct response in your answer booklet.

SECTION B (54 marks)
Answer all questions in this section.

3. (a) A form one student entered a biology laboratory and was required to identify the apparatuses used for;

1. Magnifying specimens
2. Taking known volumes of liquids
3. Source of heat
4. Putting a solid in a test cube.
5. Putting specimens for close observation 

(b) Why are laboratory rules important. Give two reasons.

4_., (a) How do the following affect the human immunity

1. Poor nutrition
2. Damage of the skin
3. Incomplete treatment
4. Lack of vaccination
5. Extreme stress
6. Attack of pathogen

5. (a) Plants absorb water and mineral salts from the soil through root hairs. Draw a well labelled diagram of a root hair. Using arrows how water moves from the soil to the xylem.

(b) How does transpiration pull allows the upward movement of water and mineral salt in plants?

. (a) Why did Gregory Menders chose garden pea plants ^tin his experiments rather than a human being? Give one point

(b) Masumbuko wants to divorce his wife because always gives birth to baby girls while he wants baby boy. Use genetic cross to educate Mr. Masumbuko on how sex of a child can be determined.

7. During Mitosis cells undergo many changes and finally divides into two daughter cells. Using well labelled diagrams show the features which occurs during the following            stages;

Metaphase , Telophase and Anaphase

8. (a) The process whereby food substances is broken down to release energy in the absence of oxygen is called anaerobic respiration. In five points explain the application of this process in your daily life 

(b) Explain three procedures you will use to verify the presence of stomata on leaves.

SECTION C (30 marks)

Answer any two questions from this section

9. HIV/AIDS and Sexual Transmitted Diseases can be spread from one person to another. As a form four graduate how will you educate the community about the precautions to be taken when handling peoples Leaving with HIV/AIDS and Sexual Transrriitted Infections Give six points.

10. (a) Pseudopodia, cilia, flagella and limbs are examples of locomotory structures. Using the structures given, identify the organisms using them.

. (b) Muscles are needed in order to bring movement.

1. Identify three types of muscles found in humans and their locations.
2. How do the mentioned muscles in (i) adapted to their function? To each give two points

11. What happen to each of the following hormones when oversecreted and under secreted in the body of human being.

1. Growth hormone
2. Adrenaline hormone
3. Insulin
4. Oestrogen
5. Thyroxin hormone
6. Testosterone hormone

 TANZANIA HEADS OF ISLAMIC SCHOOLS COUNCIL FORM FOUR INTER ISLAMIC MOCK EXAMINATION

033/1 BIOLOGY 1

(For Both School and Private Candidates)

Time: 3 Hours Monday, 12^th September 2022 a.m.

Instructions

1. This paper consists of sections A, B and C with a total of fifteen (15) questions.

2. Answer all questions in sections A and B, and two (2) questions from section C.

3. Section A carries fifteen (15) marks, section B carries twenty five (25) marks and section C carries forty five (45) marks.

4. All writing should be in blue or black ink except for diagram that must be drawn in pencil.

5. Cellular phones and any unauthorized materials are not allowed in the examination room.

6. Write Your Examination Number on every page of your answer booklet(s).

SECTION A (15 Marks)Answer all questions in this section

1. For each of the items (i) – (x) choose the correct answer from among the given alternatives and write its letter beside the item number in the answer booklet provided.

(i) Our muscles are attached to the bones at the joint by a strong tissue referred to as:

1. Ligament
2. Tendon
3. Cartilage
4. Connective tissue
5. Skeleton.

(ii) If a plant cell is placed in hypotonic solution, it experiences a biological condition called:

1. Haemolysis
2. Turgidity
3. Crenation
4. Plasmolysis
5. Turgor pressure.

(iii) Form four students of Mwanamutapa Secondary School conducted a scientific research and wrote a very good report. What name is given to the summarized statement of their findings?

1. Problem identification
2. Hypothesis
3. Conclusion
4. Data collation 
5. Data interpretation.

(iv) Mr. Baraka visited his maize plantation and discovered that the maize had stunted growth and leaves had turned yellow (chlorosis). Which mineral did his plantation lack? 

1. Iron
2. Calcium
3. Nitrogen
4. Sulphur
5. Potassium.

(v) Yeast is economically important because it is used in the baking process. This member of fungi is found in phylum:

1. Ascomycota
2. Zygomycota 
3. Basidiomycota
4. Eumycota  
5. Bryophyta.

(vi) Mwalimu Mujahid had a morning jog from Msamala to Peramiho (30km). After this vigorous exercise, the blood leaving his muscles is expected to have:

1. More carbondioxide, more oxygen and more glucose
2. Less carbondioxide, less oxygen and less glucose
3. More carbondioxide, more oxygen and less glucose
4. More carbondioxide, less oxygen and more glucose
5. More carbondioxide, less oxygen and less glucose.

(vii) In a car accident which occurred near central police station this morning, people brought different components in an attempt to help the victims such as soap, wire gauze, iodine tincture, pain killer and anti-malaria drugs. Identify one component which not belong to the first aid kit.

1. Anti-malarial drugs
2. Pain killers
3. Soap
4. Iodine tincture
5. Wire gauze.

(viii) In an experiment using a compound microscope, objects under observation were not seen properly due to poor light reflection. Which part of microscope will be affected?

1. Diaphragm
2. Mirror
3. Objective lens
4. Clips
5. Course adjustment knob.

(ix) Form four students were presented with two cells: Cell A (Plant cell) and Cell B (animal cell). Which feature can be used to differentiate cell A from B?

1. Presence of mitochondria
2. Presence of vacuole
3. Presence of cell wall 
4. Presence of cell membrane
5. Presence of cytoplasm.

(x) A pond was observed to contain 32,000 microscopic plants, 22,100 mosquito larvae, 15,671 small fish and 65 crocodiles. Suggest the position of the small fish in this ecological niche: 

1. Primary producers
2. Tertiary consumers
3. Secondary consumers
4. Primary consumers 
5. Quaternary consumers.

2. Match the description of genetic terms in LIST A with the corresponding genetic terminologies in LIST B by writing the letter of the correct response beside the item number in the answer booklet.

SECTION B (60 Marks)Answer all questions in this section

3. (a) Mr. Moshi reminded all science students to always follow laboratory safety rules.

By giving three (3) reasons, explain why it is necessary to adhere to this remainder?

(b) If you go to any science (Biology) Laboratory, you will come across containers carrying different chemicals. Draw and name chemical warning sign that can be found in the containers of the following chemicals: (i) Pesticides and poison

(ii) Concentrated sodium hydroxide

(iii) Spirit

4. My parents planted viable seeds of maize in last agricultural season but none of them germinated.

(a) State three (03) causes that may hinder the above process.

(b) Suggest three (03) possible ways to make the above seed germinate.

5. A form one boy shared his experience with you that he can only see near object clearly but distant object appears blurry.

(a) As a form four student, what name is given to the eye defect above and what are its cause?

(b) With the aid of a relevant diagram, show how his problem can be corrected.

6. A Blackman, an Arab, an Indian and English are all classified under one group and one scientific name Homo sapiens.

(a) Give three (3) reasons to support this grouping.

(b) State three (3) rules of the above naming process.

7. After nine months of pregnancy, Ummu Ayman gave birth to male babies who looked alike in almost all aspects and Ummu Atwiya gave birth to a boy and a girl, who did not resemble too much.

(a) What name is given to this type of pregnancy?

(b) What are the causes of this type of pregnancy?

(c) In what ways do the Ummu Ayman’s kids different from Ummu Atwiya’s kids?

8. The diagram below shows the T.S of the mammalian uriniferous tubule.

(a) Name the parts labelled A, B, C, D, E and F.

(b) Why is the above structure considered as a functional unit of the organ in which it belongs?

(c) State one biological significance of “different diameter” between vessel C and D.

(d) In reference to the above diagram, state one adaptation of camel to its habitat.

9. When Saada was fasting, she noticed the passing out of very little amount of highly concentrated urine and decided to ask her biology teacher about this situation and the teacher redirected back the same question to you:

(a) Give explanation for the above case.

(b) What would happen if Saada’s pituitary gland failed to secrete vasopressin?

10. While working in the field, one of your friends gets bitten by a snake. Outline the procedures you would follow to offer an assistance?

11. Maua who had blood group A was married to Majaliwa who had blood group B. Their first born (Kizibo) was found to have blood group O. Majaliwa denies the fatherhood of the child due to differences in blood groups. Use your knowledge of biology to clearly show Majaliwa that he is the legitimate father of Kizibo. (Genetic illustrations are important).

12. As you were watching the film “Tanzania - The Royal Tour” with your friend, some terminologies like.

(a) Ecology

(b) Population

(c) Habitat and 

(d) Predator

Seemed very strange to your friend. Explain to him the meaning of those terminologies.

SECTION C (25 Marks)Answer only two (2) questions from this section

13. At Lemira village, people have a belief that only those who are seriously sick should visit the hospital for VCT. This belief is totally wrong. Use six (6) points to show the wrong side of this belief.

14. One of your brothers refused to practice family planning and he wishes to have a child every year. Using four (4) points, convince him to accept this practice.

15. The origin and diversity of life are based on the contributions of theologians, philosophers and scientists. Clearly highlight these ideas (4 points).

THE UNITED REPUBLIC OF TANZANIA PRESIDENT'S OFFICE,  REGIONAL ADMINISTRATION AND LOCAL GOVERNMENT

ZONAL FORM FOUR MOCK EXAMINATION
(KATAVI, MBEYA, NJOMBE, RUKWA AND SONGWE REGIONS)

BIOLOGY

Time 3:00 Hours Year: 2022

INSTRUCTIONS 

1. This paper consists of sections A, B AND C with a total of fifteen (15) questions
2. Answer all questions in section A and B and two questions in section C. Question 13 is compulsory
3. Section A carries fifteen (15) marks, Section B sixty (60) marks and section C carries twenty five (25) marks
4. All writings should be in blue or black ink , except for diagrams that must be drawn in pencil
5. Cellular phones and any unauthorized materials are not allowed in the examination room
6. Write your examination number on every page of your answer sheets or booklet(s)
   

SECTION A: (15 MARKS) 

Answer All Questions

l . For each of the items (i) — (x) choose the most correct answer among the alternative and write its letter besides the item number on your answer sheet/booklet(s) provided

(i) Suppose you are using a microscope, which part of a microscope will you use to raise or lower the body tube in order to bring the image into focus ?

1. Fine adjustment knob
2. Dark and light stagé
3. Hinge screw
4. Body tube
5. Objectives lens

(ii) When a fish is taken out of water can die because;

1. It has no legs
2. Its mouth is small to get the food on land
3. Its gills are not able to exchange dry respiratory gases
4. On land there are many enemies than in water
5. The water on land flows faster than in rivers

(iii) What will happen if the xylem tissue is destroyed in green plants?

1. Transport of manufactured food will stop
2. Absorption of water in plant body will stop
3. Transport of water and minerals salts will stop
4. Transport of respiratory gases in plant will stop
5. Absorption of nutrients from the soil will stop

(iv) Which of the following are genetically identical

1. Brothers and Sisters in the same family
2. Seeds produced by the same tree
3. Gametes from the same parents
4. Cuttings taken from the same plants
5. Fraternal twins

(v) In which specific part of the female reproductive system is tubal ligation applied as method of birth control. 

1. Oviduct
2. Uterus
3. Cervix
4. Ovary
5. Vagina

(vi) When a bird builds a nest on a tree, the bird benefits but the tree neither benefits nor loses. What type of relationship is shown by bird and the tree? 

1. Amensalism
2. Parasitism
3. Mutualism
4. neutralism
5. Commensalism

(vii) Suppose your provided with housefly and ant , which equipment will you use to observe parts of the organisms mentioned clearly 

1. Test tube 
2. Watch glass
3. Hand lens
4. Beaker
5. Petri dish

(viii)A sample was extracted from a certain organism and put on a microscopic slide for observations. Results showed that the sample had no nucleus. What is the name of the cell observed?

1. Eukaryotic cell 
2. Prokaryotic cell
3. Plant cell
4. Muscle cell
5. Sperm cell

(ix) A patient who has the following symptoms mild fever , slight abdominal pain , diarrhoea and vomiting is likely to be suffering from; 

1. Malaria
2. Cholera
3. Measles
4. Tuberculosis
5. Typhoid

(x) In a certain stage of mitosis, the centromere splits the sister chromatid separates from each other and start to move towards the opposite poles of the cells. Choose the correct stage of Mitosis which account for that; 

1. Telophase
2. Anaphase
3. Metaphase
4. Prophase
5. Interphase

2. Match the descriptions in LIST A with their corresponding terminologies in LIST B by writing the letter of the correct response beside the items number in the answer booklet/sheets provided.

SECTION B: (60 MARKS) 
Answer all questions

3. Form one students in a certain school were interested to know how to classify wastes. Assume you are an expert; educate these students on four criteria used to classify wastes.

4. Form four students on their way back home found a five (5) year old boy with protruding stomach, dry and rough skin, reddish hair that fell easily and had no appetite.

(i) Name the disease the boy was suffering from.

(ii) What deficiency caused the disease?

(iii) What advice would you expect the Form four students gave to the parents of the boy?

(iv) Suggest the type of diet, which the boy may have been eating (suggest any three type of diet )

5. Explain the biological significance of the following ;

(i) Stomata are placed in the lower part of the leaf

(ii) Plants shed off leaves during dry seasons

(iii) It is advised to irrigate your plants in early morning or late evening.

(iv) Alveoli is supplied with a network of blood capillaries

6. (a) In a human urine sample, some sugar was detected during a laboratory test.

(i) What is the likely name of the detected sugar?

(ii) Name the hormone likely to be deficient in the body and the gland that produce it.

(iii) Name the disease that the person was Ii •ely to be suffering from.

(iv) What food would you recommend such a person to avoid?

(b) Why the concentration of urea in the Urine is much higher than its concentration in the glomerular filtrate?

7. Mwambipile camed out a survey to determine the number of organisms in (heir school garden. She recorded her finding in a table  as shown below;

(a) Which of the above organisms are

(i) Producers

(ii) Primary consumrs

(b) Draw a possible food chain to show the energy flow in the garden

(c) Is the food chain in 7(b) above stable? Give a reason for the answer given.

8. Mr. Chanjo is a Zoologist at Mwamanga Municipal Whose Rabbit farm has Varieties of Rabbits ha',ing different colours. In his attempt to increase the number of the red Rabbits he crossed Red Rabbit with White coloured Rabbits.

Unfortunately, all the Fl rabbits had brown colour which were not in the target of Mr. Chanjo

(i) Use genetic diagram to illustrate the result of Fl and F2 generation produced from Mr. Chanjo work.

(ii) Name the pattern of inheritance observed in the cross above.

(iii) Why brown colour was formed in Fl generation?

9. Mayele was making some tea for her mother. He accidentally touched the pan while switching off the stove. He pushed away the pan and poured all the tea.

(i) What is the name of that response

(ii) What is the name given to the pathway which describes the response in 9 (i) above

(iii) Illustrate the pathway of an impulse from the sense organ to effectors of the Mayele hand.

10. (a) Explain how a plant cell prevent bursting when placed in hypotonic solution

(b) What will be the effect in recipient's blood when he/she has been transfused an incompatible blood from the donor.

(c) State any three precautions to be taken during blood transfusion

l l . Kazinyingi is a football player at Mbuyu Football Club. When he was playing abmptly he fell down and started to make noise, while his left leg was not able to bend.

(a) What do you think happened to him?

(b) What are the common causes of the above problem that he faced? (Give four points)

12. Briefly explain four reasons why plants lack specialized excretory organs

Answer two (2) questions from this section. Question number 13 is compulsory

13. You are invited by students of Kitundu secondary school as a health officer. Explain to them five ways of avoiding risky situations, behaviours and practices that will help to lower the risks of HIV infection and STIs.

14.The basic idea of the origin of life is that at one time there was no life at all on earth and now there is a vast range of life forms. The questions arise to how and when life appeared. Justify this statement by giving five points.

15. Which classification system do taxonomists mostly prefer? Explain any four reasons as to why they prefer that system.

PRESIDENT'S OFFICE, REGIONAL ADMINISTRATION AND LOCAL GOVERNMENT

ARUSHA REGIONAL FORM FOUR MOCK EXAMINATION 

033 BIOLOGY 1

TIME : 3 Hours July 2022

INSTRUCTIONS

1. This paper consists of Section A, B and C.

2. Answer all questions in section A and B, and Only two (2) questions in section C of which question number 13 is Compulsory.

3. Write your NAME on each page of your answer sheet provided

4. Cellular phones and any unauthorized Materials are not allowed in the examination room.

5. Except for the diagrams which must be drawn by using pencils and labeled in INK all writing should be in BLUE / BLACK pen.

SECTION A (15 Marks)

Answer ALL questions in this section

1. You are given the items (i) — (x), choose the most correct answer among the given alternatives and write its letter against its item number.

(i) The purpose of examination in seientific procedures is to: -

1. Identify the problem 
2. Test the hypothesis 
3. Display the results
4. Confirm the conclusion 
5. Predict results 

(ii) For an enzyme to work properly in cellular reactions, the optimum temperature in numerals should be: -

1. 10⁰C - 20⁰ C
2. 37⁰C — 40⁰C
3. 0 ⁰C - 10^oc
4. 20⁰C - 30⁰C
5. 80⁰C - 100⁰C

(iii) Disease which is common infection of the respiratory system is: -

1. Tuberculosis
2. Aids
3. Malaria
4. Cholera
5. Typhoid

7. (a) State any three adaptations of the leaf for photosynthesis

(b) How do the following factors affect the rate of photosynthesis?

(i) Chlorophyll

(ii) Sunlight

(iii) Carbon dioxide

8. In a school garden, butterflies and bees were observed jumping from one flower to another. This action is said to be more important in fertilization in plant.

(i) Give the name of the process was facilitated by the action of this insects 

(ii) Explain the two types of the process named in (i) above.

9. (a) Explain how a plant cell prevent bursting when placed in hypotonic solution

(b) What will be the effect in a recipient's blood when he or she has been transfused an incompatible blood from the donor.

(c) State any three precautions to be taken during blood transfusion.U

10. A homozygous normal man is married to an albino woman. Using appropriate genetic symbols: 

(a) What are the genotypes of the parents?

(b) Using genetic diagrams show how the offspring were obtained

11. (a) Bean seeds placed in a closed bottle containing cold water swollen and started rotting instead of germinating. Why this?

(b) State how meristematic tissue in plant facilitate growth

12. (a) During cooking, a cook unfortunately touched a hot burning charcoal. He pulled his hand abruptly.

(i) What is the name of that response?

(ii) What is the name given to the pathway which describes the response in 12a(i) above? (b) Illustrate the pathway of an impulse from the sense organ to effectors of the cook's hand.

SECTION C

Answer ONLY TWO questions in this section. Question 13 is compulsory

13. Movement is very important in both plants and animals. Explain any four adaptive features of muscles to movement. State any three significance of tropism in plants,

14. Which classification system do taxonomists mostly prefer? Explain any four reasons as to why they prefer that system.

15. Mr. Chapakazi is not aware Of what his granddaughter. One day he called his granddaughter and asked her to outline reasons why she„studies biology. Unfortunately, his granddaughter failed. As a form Four student help Mr. Chapakazi's granddaughter to answer the question from grandfather.

PRESIDENT'S OFFICE REGIONAL ADMINISTRATION AND LOCAL GOVERNMENT

DAR ES SALAAM REGION & IRINGA- REGIONS FORM FOUR JOINT MOCK EXAMINATION - 2022

BIOLOGY - 1

CODE: 033/1

TIME: 3: 00 HOURS Tuesday 5^th July 2022 A.M

INSTRUCTIONS

1. This paper consist of sections A, B and C with a total of fourteen (15) questions

2. Answer all questions in section A and B and two (2) question from section C

3. Excepts for diagrams that MUST be in pencil all writing should be in blue or black ink

4. The work should be clearly seen and smart

5. Cellular phone and other unauthorized materials are NOT ALLOWED in examination room

SECTION A (15 Marks)

Answer all question in this section

1. For each of the item (i) – (x) choose the correct answer from among the given alternatives and write its letter beside the item number in the answer booklet provided

(i) Juma heard the phone ringing and ran pick it. The stimulus which provoked this response was

1. Light
2. Touch
3. Sound
4. Object of conduct
5. gravity

(ii) A biologist discovered a new cell in a culture. The new cell had a distrinct cell wall but it did not have a definite nucleus. The cell is most likely to be

1. Prokaryote
2. Eukaryote
3. Protozoa
4. Virus
5. Fungi

(iii) A tapeworm has no alimentary canal and yet it is able to feed because:

1. It is too fat to posses any food canal
2. Its body surface can absorb digested food
3. Its scolex has surckers
4. It has a primitive transport system
5. Its body is made up of proglottides

(iv) In green there are usually large number of green grasshoppers than brown grasshoppers. The best explanation is that the:

1. Green grasshoppers feel the need of being green to give them protection
2. Predators do not capture green grasshoppers as frequently as brown grasshoppers
3. Green grass makes the brown grasshoppers not been seen by the predators
4. Green grasshoppers obtain enough food from green grass than brown grasshoppers
5. Green grass stimulates green grasshoppers to produce and increase in number faster than brown grasshoppers.

(v) The following are example of continuous variations in human, except one, which one is it?

1. Sex
2. Pigmentation
3. Body weight
4. Height
5. Body mass

(vi) Which two bones form a ball and socket joint

1. Humerus and Ulna
2. Radius and scapula
3. Radius and Ulna
4. Scapula and humerus
5. Skull and Coccyx

(vii) Amount of temperature in human body is constant, when amount of temperature deviate from normal, one of the following process regulate the body temperature. What is it?

1. Painting
2. Aestivation
3. Vasodilation
4. Hibernation
5. yawning

(viii) Rickets is a common feature in young, children lacking one of the following vitamin;

1. D
2. A
3. B
4. K
5. C

(ix) Accumulation of lactic acid in Muscles is a result of ;

1. Aerobic respiration in plants
2. Anaerobic respiration in plants
3. Anaerobic respiration in animals
4. Aerobic respiration in animals
5. Lack of water in a cell

(x) If you do not have gloves, you can also use . . . . . . . . . . .To protect your hands

1. Socks
2. Plastic bags
3. Tins
4. A piece of cloth
5. Papers

2. Match the descriptions of the blood circulation system in List A, with their corresponding blood vessels in List B by writing the letter of the correct response beside the item number in the answer booklet provided.

SECTION B (60 Marks)

3. Before students start conducting practical in the Biology laboratory, they are supposed to be kin with laboratory safety measures. List six (6) possible causes of laboratory accidents which may likely to occur in the biology laboratory as a results of student failure to be kin with those laboratory safety measures.

4. At Majengo Primary School, during break time, Aisha was playing with others and suddenly slippered on ripe banana peels and fall down. Her teacher provided the first Aid to Aisha. Then took her to the Hospital. The doctor revealed that Aisha got Muscle sprain

1. What is a muscle sprain
2. Muscle sprain in among common accidents at home and school.
3. Mention other five common accidents at home and at school.
4. Mention four ways of preventing accidents at home and school.

5. Daudi married Lucy ten (10) years ago but not yet blessed to have a baby. They decided to go to the hospital for advice. After doctors check-up he discovered that there was a problem in their reproductive health. The doctor adviced the couples to do test tube babies and also Lucy adviced to use fertility drug.

1. How do test tube babies done
2. What may be is the problem of Lucy till the doctor advice them to practice test tube babies
3. What is fertility drug
4. What may be the reason of doctor’s advice Lucy to use fertility drug

6. (a)As a form four student who has a knowledge on Movement. Educate the form one students on the functions of the following component of the skeleton

1. Skull
2. Ribs
3. Vertebral column
4. Pelvic girdle

(b)State two types of skeleton

7. (a) When Asha was cooking in the kitchen unfortunately she touched a burning piece of charcoal and quickly, she withdrew her finger from it. Briefly describe how is this action of withdrawing the finger occurred.

(b)Tabulate three (3) differences simple Reflex Action and conditioned Reflex Action.

8. A student at Mafinga High school prepared the following experimental set up to investigate a certain phenomenon.

(a) What was the name of a phenomenon. Investigated in figures above?

(b) What was the purpose of experiment

(c) State the role of a solution of pyrogallic acid and sodium hydroxide

(d) What was the purpose of experimental se-up in flask B of experiment

(e) Predict the experimental results and interpret what happened in experiment

9. In form two class, during biology period, teacher Mkude provided bean leaf to each student. He asked students to observe external structures.

1. What are four possible observable structures?
2. Give function possible observable structures the students can observe externally
3. Draw the leaf and label the structure they observed

10. (a)In a human urine Sample, Some Sugar was detected during a laboratory test

1. What is the likely name of the detected sugar?
2. Name the hormone that was likely to be deficient in the body of the person whose urine was tested and the gland that produce it.
3. Name the disease, that the person was likely to be suffering from
4. What food would you recommend such a person to avoid.

(b)Explain why there is a great concentration of Urea in urine than in glomerular filtrate.

11. If Dina is 70kg and 150cm tall

(a) What is her BMI (Body Mass Index)

(b) What are nutritional disorders was likely to get due to her BMI

(c) What advice you can advice Dina, so as to correct the problem you mentioned in 10(b) above

12. (a)With example briefly explain how comparative embryology supports the idea of organic evolution.

(b)Outline two Merits and demerits of Lamarck’s theory of evolution

SECTION C: (25 Marks)

Answer two (2) questions from this section. Question 13 is compulsory

13. Write an essay on AIDS using the following guidelines

1. Cause of the disease
2. Where the causative organism can be found in infected people
3. Two ways by which the disease is transmitted
4. Three symptoms of disease
5. Three, ways of preventing the disease from infecting people
6. Two ways of caring for people living with HIV/AIDS

14. Virus is one of the organism which are not classified in any of the kingdoms among ling things

1. Why virus is not classified among Kingdoms of living organisms
2. What is virology
3. Discuss three(3) advantages of virus
4. Discuss two(2) disadvantages of virus
5. List four (4) viral diseases.

15. In an experiment, a variety of garden peas having a smooth seed coat was crossed with a variety having a wrinkled seed coat. All the seeds obtained in F₁ had a smooth seed coat. The F₁ generation was selfed. The total number in F₂ generation was 6240, Let the gene for smooth seed coat be S.

(a) Work out the genotypes for the F₁

(b) Work out the following for the F₂

1. Genotypes
2. Phenotypes
3. Genotypic
4. Phenotypic ratio
5. Total number of smooth seeds
6. Total number of winkled seeds

THE UNITED REPUBLIC OF TANZANIA PRESIDENT’S OFFICE

REGIONAL ADMINISTRATION AND LOCAL GOVERNMENT 

LUDEWA DISTRICT COUNCIL 

FORM FOUR MOCK EXAMINATION 2022   

 033/1 BIOLOGY 1

(For Both School and Private Candidates) 

Time 3 Hours 9^th JUNE 2022 

Instructions

1. This paper consists of section A, B and C with a total of fifteen (15) questions

2. Answer all questions in sections A and B and TWO questions from section C in which question 13 is compulsory.

3. Except for diagrams that must drawn in pencils all writings should be in blue ink.

4. Calculator and cellular phones and any other unauthorized materials are not allowed in the examination room.

5. Write your examination number on every page of your answer sheet.

SECTION A (15% MARKS) Answer all questions in this section

1. For each of the items (i) - (x), choose the correct answer from among the given alternatives and write its letter beside the item number in the answer sheet provided.

i. Mwanaidi wanted to get powder from a piece of cassava so that she could carry out food test experiment in biology laboratory to know the food nutrient(s) present in cassava. Which of the following apparatus could she use to obtain powder from piece of cassava?

1. Pestle 
2. Grinder 
3. Motor
4. Motor and pipette  
5. Pestle and motor 

ii. Maize plants of Kilimani primary school farm have yellow leaves and leaves fall without withering. What mineral element should be added in the soil of school farm to improve the qualities and yields of maize?

1. Magnesium
2. Copper
3. Zinc
4. Iron 
5. Calcium 

iii. During a practical session Adam picked a plant which had the following characteristics: fibrous root system, non-woody stem, vascular bundles without cambium and the flowers contained six sepals and six petals. As a biologist what class of the plant picked by Adam belongs?

1. Dicotyledonae
2. Angiospermophyta  
3. Coniferophyta
4. Monocotyledonae 
5. Pteridophyta 

iv. Lijuakali started salivating as he saw a plate of cooked rice with roasted pieces of pork meat in the restaurant when he was on the way from school to home. What part of the brain is concerned with Lijuakali salivation?

1. Cerebellum 
2. Central hemisphere 
3. Medulla oblongata
4. Hypothalamus  
5. Hind brain 

v. Mr. and Mrs. Chausiku, happened to have four children in their marriage. One of them is an albino. What is the possible genotype of Mr. and Mrs. Chausiku?

1. AA x aa 
2. Aa x Aa 
3. AA x Aa
4. Aa x aa
5. Aa x aa 

vi. During the biology class session a biology teacher explained to his students about a theory of origin of life which state that “the universe has always existed and has no origin, that is, it did not have a moment of creation thus life has no origin.” Which of the following is the correct name of this theory

1. The steady state theory 
2. Special creation theory 
3. Organic evolution theory
4. Cosmozoan theory  
5. Spontaneous generation theory 

vii. Most of students have failed to make a clear distinction between members of class arachnida from those of class insecta when they were classifying different living organisms in biology laboratory. As the expert of biology what is the characteristic which distinguish this two group of phylum arthropoda?

1. The insects have three body parts while arachnids have four body parts
2. The insects have one pair of antennae while arachnids have two pair of antennae
3. Insects have six pair of walking legs while arachnids have three pair of walking legs
4. Insects are carnivorous while arachnids are herbivorous
5. Insects carry out gaseous exchange through tracheoles system while arachnids carry out gaseous exchange through book lungs

viii. Biology teacher advised students to use dry mass method when they are estimating the growth of different plants. Why the biology teacher advised students to use this method compared to other methods that can be used?

1. Dead organisms are easier to work 
2. Dry plants are lighter to measure 
3. It exempts the variations due to with water content 
4. It measure even irregular organism
5. It is simple that other methods

ix. The menstrual cycle is marked by the flow of blood from the uterus after a period of time and it is regulated by hormones produced inside the women body. Calculate the date of ovulation in a menstrual cycle of 28 days if menstruation occurs on day 9^th to 13^th of a month

1. 18^th 
2. 20^th 
3. 28^th
4. 22^nd
5. 19^th

x. Form two students were observing the structures of animal cells by electron microscope in the biology laboratory. Unfortunately the image formed from their microscopes was not clear. Which of the following part of microscope will they use to adjust in order to obtain a sharp images of animal cells?

1. Rotating nose piece
2. Coarse adjustment knob 
3. Fine adjustment knob
4. Eyepiece lens 
5. Mirror 

2. Match the items in List A with the responses in List B by writing the letter of the correct responses in List B besides the item number in the answer booklet provided

SECTION B: (60 marks).

Answer all questions in this section

3. A laboratory technician of Mavanga secondary school he arranged the apparatus listed below on the laboratory working benches in order for his students of form four class to conduct a food experiment. Assume you are the one that you are going to use these apparatus during food test experiment. Explain briefly how you will use them correctly

1. Test tube
2. Spatula
3. Beaker 
4. Test tube rack
5. Dropper
6. Bunsen burner

4. a) The acronyms AIDS, ARVs and HIV they are being used in hospitals and schools while most of people in the community they do not know the clear meaning of these acronyms. Assume you are the biology expert in your community make a clean meaning of these acronyms so that everybody can understand.

b) Our bodies are being protected against diseases and infections by different types of white blood cells. Explain the functions of the following types of white blood cells found in our bodies.

i. Neutrophils and monocytes

ii. Eosinophil’s and basophils

iii. B lymphocytes and T lymphocytes

5. Juma was narrating a story in a class about a person who has unbelievable strength when subjected in an extremely dangerously situation. How might person narrated by Juma be able to get such strength within a short period of time? Explain six poi

6. Maria and Mussa wanted to grow bread moulds. Maria put a moist piece of bread on a cupboard. Mussa put a dry piece of bread on the different cupboard. After three days Maria found greyish substances on the surface of that piece of bread she put on her cupboard, Mussa did not.

i. Explain Mussa and Maria observations.

ii. Draw a well labelled diagram of the substance observed by Maria on a cupboard after three days.

7. Animals have different hormones which perform different functions in their bodies this is like plants which have different hormones performing different functions. This hormones present in plants regulate plant growth and development .As a biologist explain four types of hormones responsible for regulations of plant growth

8. Suppose you are teaching biology at a certain school in Ludewa district. During a biology class session in form three, one form student asked you a question which state that “why plants do not need an elaborated excretory system similar to that of animals such as human being?” respond the question by explaining briefly six points.

9. a) Explain the following phenomena as used in biology.

i. Insulin and glucagon hormones work antagonistically

ii. In cold and humidity weather, human usually produce large quantity of urine that is colorless.

b) Nowadays people in world are suffering many diseases caused by poor waste disposal. By using knowledge that you have, explain three basic principle that will you use to minimize this problem in the world.

10. A woman of blood group A claims that a man of blood group AB is a father of her child. A laboratory blood group test reveals that the child’s blood group is O. As the biologist answer the following questions by using punnet square.

i. Is it possible that the woman’s claim is correct? Prove

ii. What could be if the father blood group is group B? Explain your reasoning

11. a) Form two students of Mlimani secondary school were discussing about biology concerning a topic known as balance of nature. During their discussion they come across with three new terminologies which are unknown to them. Help them by giving a clear explanations about these terminologies. i. Autecology

ii. Ecological niche

iii. Synecology

b) Form four students of Liganga secondary school had a study tour to Manyara National Park. During their visit they observed the following organisms:vulture, antelope, shrubs, cheetah and wildebeest. As a form four student, draw a diagram that represents the food web and two food chains from these organisms

12. a) The malaria parasite has resisted in the recent past most of malaria drugs. Bacteria and pests have also resisted antibiotics and pesticides respectively. Explain the biological basis for this behavior

b) Most of students have failed to make a clear distinction of two terminologies which are analogous structures and homologous structures as they are used in biology. As the expert of biology make a clear distinction of these two terminologies, include examples in each case.

SECTION C: (25 Marks)

Answer any two (2) questions from this section. Question number 13 is compulsory

13. Nowadays most women are using artificial methods to prevent pregnancies intentionally without considering the negative impacts of these methods. Assume you are the health officer of Mtakuja village prepare a report that explain in details about the negative impacts of these methods of family planning. (four points)

14. A middle-aged man is regularly visiting the local traditional healer, suspecting that he has been bewitched by a certain old man in the village. He has a prolonged cough and is emitting blood-stained sputum whenever he coughs. He has not eat properly because he has poor appetite and suffers from weight loss. Also he is surprised that he sweats during the night.

a) What would you advice the man to do and which disease is he likely to be suffering from?

b) Briefly explain the cause and how the disease is transmitted from one person to another person

c) Explain three four methods that you are going to use so as to prevent and control the disease.

15. Form two students of a certain school were interested to know the application of anaerobic respiration in their daily life. Assume you are a biology teacher; explain to these students the application of anaerobic respiration in their daily life( four points)

vi. A person who admitted in the hospital after an operation will mostly likely be fed on food rich in

1. A. Vitamin C
2. B. Vitamin A
3. C. Protein
4. A. Lipids
5. E. Water

vii. The offspring's resulted from the cross between red flowered and white flowered plants were always found to be pink. This is an example of; -

1. Incomplete dominance
2. Codominance
3. Crossing over
4. Mutation
5. Natural selection

viii. Rising in body temperature in the human body is corrected mainly by

1. Dilating the skin arteries and sweating
2. Constricting the skin arteries and shivering
3. Dilating the skin veins and shivering
4. Constricting the skin veins and shivering
5. Dilating of arteries and shivering

ix. The development of unfertilized ovary of a plant into a fruit is called

1. Parthenogenesis
2. Parthernocapy
3. Ovovivi parity
4. Oogenesis
5. Ovulation.

x. The interaction between two species in which both organism benefit is known as,

1. Commensalism
2. Endo parasite
3. Mutualism
4. Parasitism
5. Ectoparasite

2. Match the description of the part of urinary system in list A with their correspondence terminologies in list B by writing the correct letter beside the item number in the answer booklet provided

SECTION B (60 marks)

Answer all question in this section

3. Asha accidentally fall in the class and was found that she was not breathing, the student helped her to recover breathing

a. What is the name of process done by the students?

b. What are the qualities of the students who gave the process (Give two qualities)

c. What were the reasons of giving the above process/ Give ay three reasons

4. Draw a structure of rabbit cell and label the parts used for

a. Controlling all activities of the cell

b. Control movement of materials

c. Provide medium of the chemical reaction

5. Form three (Ill) Students from Mahorasha Secondary School visited at Serengeti National Park and the following organism were observed;- Hyena, Shrubs, Grasses', elephant, Lion, bacteria and Zebra

a. Construct a food web that accommodates all organisms

b. Outline any two (2) food chains from above constructed food web in 5 (a) above

c. What will happen in an ecosystem if all shrubs and grasses are deplenished

6. (a) Why is it recommended to greet the elders, help the elders not talking while eating and avoiding abusive language? (three reasons)

(b) How will you maintain the proper person hygiene during puberty (three reasons)

7. Mr Jose is a bachelor boy he always does not wash his plates after meal. One day he observed blackish substance on the plate which was lifted with food remains for three days

i. Give the name of that blackish substance

ii. State the kingdom and division/phylum to which that substance belongs

iii. State four characteristics/features of organisms that cause blackish substance

8. How does the skin of the man regulate internal body temperature when the external environment is over heated? Briefly explain by giving three ways

9. (a) Give the name of the muscles which are found above and below the humerus

(b) Explain what will happen when

i) The arm is bending ii) The arm is straight

10. (a) Briefly explain how water air and temperature facilitate seed germination

(b) Differentiate between hypogeal and epigeal germination (Three differences)

11. (a) Explain four features of respiratory surface

(b) Name the structure used for movement in the following organism

i) Amoeba

ii) Paramecium

iii) Mammals

iv) Fish

12. Mwakajoka planted pea plants in his garden. In Fl generation all pea plants were found to be tall on selfing 1000 pea plants were obtained

a. Work out to determine the genotype of F2 generation

b. How many pea plants were?

i. Homozygous tall

ii. Heterozygous tall

iii. Homozygous short

SECTION C (25 MARKS)

Answer two (2) question from this section question number 13 is compulsory

13. Why are mother's advice breast feed their babies instead of using bottle feeding or cup feeding from powder or liquid milk? (six point)

14. Dotto and Kulwa believed that livings thing does not change with the course of time. As a biologist convinces them by briefly explain the evidence of organic evolution. Give four points

15. Growth and development of an organism particularly human being is-affected by a number of factors due to his or her own life style and environment. Based on this statement explain any six factors that affect human growth and development.

THE UNITED REPUBLIC OF TANZANIA PRESIDENT’S OFFICE, REGIONAL ADMINISTRATION AND LOCAL GOVERNMENT

MWANZA CITY JOINT EXAMINATION (NYEGEZI, BUTIMBA AND MKUYUNI WARDS)

FORM FOUR PRE - MOCK EXAMINATION-2021

033/1 BIOLOGY 1  

Time: 3 HOURS MAY ,2021

Instructions

1. This paper consists of sections A, B and C with a total of 15 questions.
2. Answer all questions in sections A and B and TWO questions from section C in which question 13 is compulsory
3. All writing should be in blue or black pen, except for diagrams which must be in pencil
4. Cellular phones and any unauthorized materials are not allowed in the examination room.
5. Write your examinations numbers on every page of your answer sheet(s).

SECTION A (15 Marks

Answer all questions in this section.

1.  For each of the items (i)-(x) choose the correct answer among the given alternatives and write its letter beside the item number in the answer booklet provided.

(i) Viruses are considered to be non-living because:

1. They are only active in the contents of a living cell 
2. They have true nuclei
3. The body is covered by cell wall
4. They are single cell Eukaryotic Organism 
5. They have cell wall made up of cellulose.

(ii) Select the items that indicates the best Match in the vitamin –deficiency 

1. Vitamin A ………dry scalyskin
2. Vitamin B............. loss of appetite and yawning
3. Vitamin C............. anaemia and high blood pressure
4. Vitamin D............. soft deformed bones
5. Vitamin E............. poor night vision

(iii) Which of the following is a chemical substance that catches fire easily?

1. Corrosive
2. Flammable
3. Oxidant
4. Irritant
5. Harmful

(iv) When students were conducting private study at right, lights went off suddenly. Which of the following changes occurred in the eyes of the students?

1. The lens become thicker 
2. The pupils become large
3. The ciliary muscle relaxed 
4. The lids closed
5. The eyes opened wider

(v) One of the following is the principle of good manner 

1. Eating fast
2. Speaking respectively
3. Throwing food
4. Wearing tight clothes
5. Washing the body everyday

(vi) Which of the following is formed immediately after fertilization?

1. A placenta
2. An embryo
3. A foetus
4. Amniotic fluid
5. A zygote

(vii) A type of germination where by the Cotyledons is raised above the ground is called

1. Epigeal
2. Hypogeal
3. Hypocotyls
4. Tap root
5. Epicotyls

(viii) The offspring produced by mating the F₁generation is known as

1. F₃ generation 
2. F₁ products 
3. F₂ products 
4. New generation 
5. Genetic generation

(ix) Which food substance can be tested by using Iodinesolution? 

1. Protein
2.  Starch 
3. Carbohydrate 
4. Non reducing sugar
5. Reducing sugar

(x) People with blood group............. are called universal recipients

1. AB
2. B
3. O
4. A
5. None of the above

2. Match the phrases in List A with the corresponding responses in List B, by writing the letter of the correct alternative in List B on the answer sheet provided.

SECTION B (60 Marks)

Answer all questions in this section.

3. (a) Define the following terms as used in biology.

(i) Biology laboratory (ii) Botany

(b) Give the function of the following parts of light microscope (One function in each).

1. Mirror
2. objective lens
3. Eye piece
4. Base
5. Limb or Arm
6. Clip
7. Course adjustment
8. Stage

4. (a) (i) What are the raw materials for photosynthesis

(ii) List one product of photosynthesis

(b)State how the ileum is adapted for absorption function.

5. (a) Differentiate between a zygote and a sperm

(b) Name the hormone in human body which

1. Secreted during birth to initiate labour 
2. Stimulate milk production
3. Re absorption of water in the kidney 
4. Sodium absorption in the kidney.

6. (a) Differentiate between epigeal and hypogeal germination

(b) Mention condition necessary for seed germination

(c) Describe changes occurs during seed germination

7. (a) What do you know by the following terms

1. Genetics
2. Albinism
3. Complete dominance
4. Mutation

(b) Mr and Mrs Msakanjia happen to have four children in their marriage, one of them is albino, use the genetic diagram to prove the statement above.

8. (a) Give the function of

1. Red blood cell
2. White blood cells

(b) Outline six roles played by the blood in Human beings.

9. (a) Explain the term Osmoregulation

(b) Briefly explain the mechanisms of regulating sugar level in theblood.

10. (a) How could the body remove or destroy a bacterium that lands

1. On the cornea 
2. On the Hand 
3. In the bronchus
4. In the stomach

(b) Explain why it is

(i) Not health to sleep in a closed room with many potted plants

(ii) Dangerous to sleep in a poorly ventilated room with a charcoal burner on.

11. (a) Write short notes on the following terms; food chain and food web.

(b) Construct sensible food web from the given organisms, Grass, Grass hopper, Rabbit, Toad, Snake, and Vulture

12. (a) Differentiate between Sexual reproduction and Asexual reproduction

(b) State two behaviors which may lead to the following risk.

1. STD’s
2. HIV infection

SECTION C (25 Marks)

Answer two (2) questions from this section. Question 13 is compulsory.

13. During the rainy season the common problem of eruption of diseases become more serious. Cholera has been a long-term problem in Tanzania. The government tried to eradicate the disease but has not been very successful

(a) Explain the possible reasons that have led to the failure of problem of cholera

(b) Explain how this disease can be eradicated successfully in terms of its mode of Transmissions, control, and curative methods.

14. Food preservation is very important in Human life. Discuss its importance under the following guideline

(a) Need for preservation

(b) Local (traditional) food preservation methods and their biological effects

(c) Advantages of local food preserving methods.

15. With the aid of well labeled diagram explain clearly how the gaseous exchange occurs across alveolus

Candidate's Name. . . . . . . . . . . . . . . . . . . .

PRESIDENT'S OFFICE REGIONAL ADMINISTRATION AND LOCAL. GOVERNMENT

ARUSHA REGION MOCK EXAMINATION - MAY 2021

FORM FOUR

033 BIOLOGY

TIME: 3:00HRS

INSTRUCTIONS

• This paper consists of sections A,B and C with a total of fifteen (15) questions.
• Answer all questions in section A and B and two (2) questions from section C of which question 13 is compulsory.
• All writing should be in blue or black ink, except for diagrams that must be drawn in pencil.
• Cellular phones and any unauthorized materials are not allowed in the examination room.
• Write your Examination number on every page of your answer booklet(s)

SECTION A(15 MARKS)

Answer all questions in this section

1. For each of the items (i) — (x), choose the correct answer among the giver alternatives and write its letter beside the item number in the answer booklet provided.

(i) Which one of the following represents the third stage of planning a scientific study

1. Formulate a hypothesis 
2. Identify the problem 
3. Carryout the experiment
4. Make observation
5. Conclusion 

(ii) A heart is an example of

1. an organ 
2. a tissue 
3. a system 
4. an organelle 
5. Trypanosome

(iii) Which one. of the following is a vector of malaria.

1. Plasmodium
2. Mosquito
3. Housefly
4. Trypanosome
5. Tsetse fly

(iv) The main end product of photosynthesis is transported ^-away from the leaves by the

1. Xylem 
2. Veins 
3. Phloern
4. Vascular bundles 
5. Lateral buds

(v) Below are some of diets taken in most of developing countries, them could easily cause Kwashiorkor in children?

1. Millet with fish
2. Cassava with beans
3. Rice with Meat
4. Maize with wheat
5. Fish with banana

(vi) The body of a mother watching her child falling from the dining table will most probably secrete one of the following chemical substances

1. Thyxone 
2. Adrenalin
3. Glucoline
4. Insulin 
5. Glucagon ) 

(vii) Man eats green vegetables, meat and fruits of some plants. The man is best described as

1. Omnivore 
2. Herbivore 
3. Carnivore
4. Heterotroph 
5. Autrotroph

(viii) The heart, liver, brain, lungs and kidney of humans do not grow at the same rate, What is this type of growth called

1. Unlimited growth
2. Human growth
3. Limited growth
4. Algometric growth
5. Isometric growth )

(ix) Genotype of an organism describes the

1. Physical appearance
2. Genetic constitution
3. Interaction
4. Genes with the environment
5. effects of the environment

(x) A woman. gives birth and produces twins, a boy and girl because;

1. One egg was fertilized and then divided into two
2. The uterus was large enough for two embryos to develop
3. Her ovaries produced two eggs which were both fertilized
4. Twins were produced in her family
5. Identical twins were produced (

2. Match the phrases in List A with the responses in List B by writing the letter of the correct response from List B beside the item number of List A in your answer booklet provided.

SECTION B

3. In the biology laboratory there are different apparatus and equipment used for conducting experiment Name the apparatus used for:-

1. Catching small insects
2. Magnifying microorganism
3. Determining temperature of liquids
4. Measure mass of substances
5. washing test tube
6. Holding and heating small sample of liquid.

4. Mr. Ngedere picked a plant which had the following characteristics fibrous rout system, Non-woody stem, vascular bundles without cambium and flowers contained six petals and six sepals

1. Name the division and class to which the plant belong
2. State four characteristics of the division to which the plant belongs.

5. Use a flow diagram to describe the Neuron pathway of a reflex action.

6. In hot weather human tend to produce more sweat and smaller volume of darker coloured urine. In cold weather humans tend to produce more urine that is paler in colour. Use your knowledge of how the kidney functions to explain observation.

7. (a) (i) State the Mendel's first law of inheritance

(ii) lnterms of Nitrogenous bases present, differentiate between DNA and RNA

(b) A woman who has blood group A is married to a man of blood group B the first born is of blood group 0. The man claims that the child is not his. Can you settle the dispute using your knowledge of genetics? With aid of diagram, explain how you can arrive to your answer.

8. (a) Mr. Ngoma is a farmer he made a survey to the farm where Maize was planted and observed that all seeds, have germinated. List the environmental conditions that are necessary for germination to take place on his farm.

(b) Explain why the factors listed are necessary.

9. (a) Shalon is always suffering from Sudden, involuntary and painful contractions of single muscles or a group of muscles when attempt to strenuous exercise. What is a name of condition suffered from? 

(b ) Give two(2) causes of the condition named above (9a)

(c)Give two ways you can advise shalon how to avoid this problem.

10. (a) With examples state the meaning of "Abiotic" and 'biotic" factors of the environment.

(b) (i)Differentiate the terms "food chain"from a utraphic level"

(ii) Construct the food web by using the following organism. Grass, gazelle, wildebeest, lion, decomposer, hyena, zebra and shrunk.

11. (a) How aerobic respiration differ from anaerobic respiration Give four points.

(b) List four properties of respiratory surface

12. (a) Write the meaning of the following terms (i) Ovulation (ii) Fertilization (iii) Zygote (iv) Embryo (v) Foetus

(b) Draw a well structure of female reproductive system and label the parts where dogenesis take place, site for implantation and site for fertilization.

SECTION C (25 Marks) -

Answer two (2) questions from this section .Question 13 is compulsory

13. A group of students had a study visit to Mount Meru hospital at Arusha. They noted a patient with running nose, dry cough, fever, loss of taste, sore threat, headache and difficult. breathing.

1. What could be the possible disease that the patient was suffering from.
2. Briefly explain the causes and three (3) ways of transmission of the disease.
3. Explain four (4) controls/preventive measures of the disease mentioned in (i) above.
4. How the disease can be treated/cured

14. (a) Explain four (4) factors affecting growth in human

(b) (i) Name three (3) methods that you can use in the laboratory to measure growth of organisms.

(ii) Give (2) processes that take place in body cells to bring about growth

15. In an experiment, genets crossbreed yellow maize with white maize. The ratio of yellow to white in the F2 generation was 3: 1

(a) (i) Which of the two characters do you think was dominant

2. What is the colour of the maize in the F₁ generation
3. Show the percentage of pure yellow in the F₂ generation

(b) For the time a man has reared animals and grown crops. Give four (4) phenotypic features have been selected for modern agricultural purposes.

Time: 3 HOURS Tuesday, 4 August 2020 a.m.

Instructions

1. This paper consists of sections A, B and C with a total of fifteen (15) questions.
2. Answer all questions in sections A and B and TWO questions from section C in which question 13 is compulsory
3. All writing should be in blue or black pen, except for diagrams which must be in pencil
4. Cellular phones and any unauthorized materials are not allowed in the examination room.
5. Write your examinations numbers on every page of your answer sheet(s).

SECTION A (15 Marks)

Answer all questions in this section

1. For each of the items (i) -(x), choose the correct answer among the given alternatives and write its letter beside the item number in the answer booklet provided

(i) Which of the following is the most important difference between plants and animals?

1. Growth
2. Movement
3. Nutrition
4. Sensitivity
5. Development

(ii) The following are the branches of biology. Identify one which is not

1. Microbiology
2. Ecology
3. Genetics
4. Science
5. Mycology

(iii) Which of the following specialized cells in plant is responsible for the high concentration of chloroplast responsible for photosynthesis?

1. Chlorophyll
2. Palisade
3. Guard cell
4. Root hair cells
5. Xylems

(iv) The following are examples of water borne diseases:

1. Malaria and Bilharzias
2. Diarrhea and malaria
3. Yellow fever and Typhoid
4. Cholera and Typhoid
5. Malaria and Typhoid

(v) Mutual interaction between two species is described by which of the following statement?

1. Both lives as parasite
2. Both benefit and flourish
3. One harmed and the other benefit
4. Both neither benefit nor harmed
5. Non –of the above is correct

(vi) A very young tadpole breath by means of

1. Spiracle
2. Gills
3. Segments
4. Nostril
5. Skin

(vii) Salome gets an accident and found that she could hardly maintain her body equilibrium. Which one among the following structures of her body was probably damaged?

1. Cochlea
2. Medullar Oblongata
3. Semi secular canal
4. pituitary canal
5. Auditorium canal

(viii) Pancreases secrete pancreatic juice which contain the following enzymes

1. Bile, Lipase and Trypsin
2. Trypsin, Bile and Amylase
3. Amylase, Trypsin and mucus
4. Renin, Trypsin and amylase
5. Trypsin, mucin and lipase

(ix) -------- is the force responsible for pulling of water to the top of the tall trees

1. Capillarity pull
2. Transpiration pull
3. Osmotic pressure
4. Turgor pressure
5. Mass flow rate

(x) -------- and --------- grows into shoot and root respectively during seed germination

1. Plumule and Epicotyl
2. Plumule and radicle
3. Radicle and Plumule
4. Seed and Hilum
5. Epicotyl and plumule

2. Match the responses in List A with responses in List B by writing the letters of the correct response beside the item number in the answer booklet provided.

SECTION B (60 Marks)

Answer all questions in this section

3 (a) Name the locomotory organs of the following organisms

1. Amoeba
2. Euglena
3. Man
4. Earthworm

(b) Differentiate between movements and locomotion.

4 (a) (i) What are the raw materials for photosynthesis

(ii) List one product of photosynthesis

(b) State how the ileum is adapted for absorption function.

5 (a) Give four forms and shapes of bacteria

(b) Outline four economic importance of useful bacteria.

6. (a) Briefly explain the meaning of the following biological terms

1. Seed germination
2. Epigeal germination
3. Meristerms
4. Primary growth in plants

(b) State four significances of water during seed germination.

7. (a) How could the body remove or destroy a bacterium that lands

1. on the cornea
2. on the Hand
3. on the bronchus
4. in the stomach

(b) Explain why it is

(i) Not health to sleep in a closed room with many potted plants

(ii) Dangerous to sleep in a poorly ventilated room with a charcoal burner on.

8. (a) Write short explanation of the following terms

(i) Excretion (ii) Neurone

(b ) Animal brain has different part with different functions, discuss the function of the following parts

1. Motor neurons
2. Relay neurons
3. Sensory neurons
4. Medulla oblongata

9. (a) Explain the meaning of the following terms in relation to coordination

(i) Reflex action

(ii) Reflex arc

(b) Distinguish between simple and Conditioned reflect action. Give four points.

10 (a) (i) Define Immunity

(ii) Distinguish between natural active immunity and artificially active immunity

(b)Name four diseases which children are immunized

11. (a) Explain the meaning of the following terms:

1. Excretion
2. Deamination
3. Detoxification
4. Secretion

(b) The following are the main excretory products in man carbon dioxide, excess water and Urea

(i) Name the major organs through which each is excreted

(ii) Name two substances that the body would be deficient following heavy sweating

12. (a) Elaborate any three traditional and three modern methods of food processing and preservation.

(b) Show clearly the importance of Breast- feeding in children (Give 3 points)

SECTION C, 3 QUESTIONS

13. (a) Briefly discuss the following theories of origin of life.

( i ) Special creation

( ii ) Chemical evolution theory

(b) Outline Lamack’s Theory of evolution and explain with specific examples why biologists dispute the theory today.

(c) Outline the main differences between Lamack’s and Darwin’s theories of evolution.

14. (a) What are the four major differences between Deoxyribonucleic acid (DNA) Ribonucleic Acid (RNA).

(b) A pure breeding pea plant with smooth seeds was crossed with pure breeding pea plant with wrinkled seeds

(i) Show the result of F1 and F2 on selfing F1 .

(ii) Work out the phenotypic and genotypic ratio of F2.

15. Write an essay on the transportation in plants using the following guidelines

(a)Meaning of transportation

(b)The importance of transportation

(c )The adaptation of features which enable the plant to reduce water loss.