BIOLOGY FORM FOUR NEW NECTA FORMAT

THE PRESIDENT’S OFFICE

MINISTRY OF EDUCATION, REGIONAL ADMINISTRATION AND LOCAL GOVERNMENT

COMPETENCY BASED SECONDARY EXAMINATION SERIES

BIOLOGY 1  TERMINAL  EXAMINATION

FORM FOUR-2021

Time: 3Hours

Instructions.

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

 SECTION A (20 Marks)

 Answer All questions in this section.

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

  1. The joint in the human body which allows movement in all directions is known as
  1.  pivot
  2.  hinge
  3.  double hinge
  4.  ball
  5.  peg and socket and socket
  1. Which of the following is a metabolic waste product?
  1.  Tears
  2.  Saliva
  3.  Mucus
  4.  Faeces
  5.  Urine
  1.                     The following are examples of water-borne diseases:
  1.  malaria and bilharzia
  2.  yellow fever and typhoid
  3.  diarrhoea and malaria
  4.  cholera and plaque
  5.  cholera and typhoid
  1.                      One of the distinctive features of kingdom Fungi is possession of:
  1.  plasma membrane
  2.  cytoplasm
  3.  chitin materials
  4.  cell membrane
  5.  cellulose material
  1. When students were conducting private study at night, lights went off completely. Which of the following changes occurred in the eyes of the students?
  1.  The lens became thicker
  2.  The pupil became larger
  3.  The ciliary muscle relaxed
  4.  The lids close
  5.  The eyes opened wider
  1.                      Select the item that indicates the best match in vitamin­deficiency:
  1.  Vitamin A dry scaly skin
  2.  Vitamin B loss of appetite and yawning
  3.  Vitamin C anemia and high blood pressure
  4.  Vitamin D soft deformed bones
  5.  Vitamin K poor night vision
  1.                   Which of the following is formed immediately after fertilization?
  1.  Placenta
  2.  An embryo
  3.  A foetus
  4.  Amniotic fluid
  5.  A zygote
  1.                The human ovary secretes hormones known as:
  1.  Oestrogen and testosterone
  2.  Progesterone and testosterone
  3.  Oestrogen and lactogen
  4.  Oestrogen and progesterone
  5.  Follicle stimulating hormone and progesterone
  1.                      The offspring of crosses between red flowered and white flowered plants were always found to be pink. This is an example of:
  1.  Crossing over
  2.  Mutation
  3.  Co-dominance
  4.  Incomplete dominance
  1. Species with cellulose in their cells are formally placed in
  1.  Kingdom Monera
  2.  Kingdom Animalia
  3.  Kingdom Fungi
  4.  Kingdom Plantae
  5.  Kingdom Protista

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.

LIST A

LIST B
  1. A stage of growth in humans, characterised by rapid growth and a lot of physical and mental changes.
  2. A type of seed germination whereby cotyledons are pushed above the ground
  3.                     The ability of seeds to germinate
  4.                      The region of most active growth in plants
  5. A type of seed germination whereby cotyledons remain beneath in the ground
  1. Meiosis
  2. Hypogeal germination
  3. Adulthood
  4. Dormancy
  5. Epigeal germination
  6. Adolescent
  7. Stem and root apices
  8. Viability

 


SECTION B (60 Marks)

Answer all questions in this section.

3.  (a) What do you understand by the term “First Aid”?

(b) State how you would render First Aid to a person who has been shocked by electric current.

4. (a) Define the terms “digestion” and “feeding” as used in Biology.


(b) Explain why during digestion the food is:

  1. Alkaline when in the mouth.
  2. Acidic when in the stomach.
  3. Alkaline when in the ileum.

5. State three actions which take place in the human body in response to each of the following conditions:

  1. When the temperature of the surroundings is low.
  2. When the body temperature rises due to increase in the surrounding temperature.

 

6. The diagram below represents some gaseous exchange structures in humans.

https://www.advance-africa.com/images/chest.png

(a) Name the structures labeled K, L, and M . 

(b) How the structure labeled J is suited to its function? 


(c) Name the process by which inhaled air moves from the structure labeled L into blood capillaries

7.  How is a guard cell structurally adapted for gaseous exchange? 

8.(a)  Colour blindness is a sex linked trait controlled by a recessive gene b. If a mother is a carrier and the father is normal, What is the chance that their son will be colour blind? Show your working. 

(b) State two guidelines that should be followed when typing scienti?c names.(2 marks)


9.(a) State three characteristics of the class Crustacea.

(b)  Explain why it is not advisable to be in a poorly ventilated room with a burning charcoal stove.(3 marks)

10.( a) State two disadvantages of sexual reproduction in animals. 

(b) State two functions of the placenta in mammals. 

11. (a) State three functions of blood other than transport. 

(b) State the economic importance of anaerobic respiration in plants. 

12.  (a) Explain how the sex of a male child is determined in human beings. 

(b)

 (i) Define the term diploidy. 

(ii) Name the type of cell division that gives rise to diploid cells. 

(iii) Name the type of cells in which the process named in (b) (ii) above occurs. 

(iv) State the significance of diploidy. 


SECTION C (25 Marks)

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

13. Explain two differences between artificial and natural classification systems and indicate the two merits and demerits for each system.

 

14.  Describe the role of hormones in the human menstrual cycle. 

15. Explain the various ways in which seeds and fruits are adapted to dispersal. 

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LEARNINGHUBTZ.CO.TZFORM FOUR BIOLOGY MODAL SERIES 28


THE PRESIDENT'S OFFICE

MINISTRY OF REGIONAL GOVERNMENT AND LOCAL GOVERNMENT

PRE-NATIONAL  EXAMINATION SERIES-1

BIOLOGY  FORM-4

2020

TIME: 3:00 HRS

Instructions

  1. This paper consists of sections A, B and C with a total of fifteen (15) questions.
  2. Answer all the questions in sections A and B and two (2) questions from section C of which question 13 is compulsory.
  3. All writing should be in blue or black pen, except for diagrams that must be drawn in pencil.
  4. Cellular phones and any unauthorised materials are not allowed in the examination room.
  5.  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) Why is it advised to build an incinerator in every hospital and health centre? 

  1. for collecting wastes. 
  2. for disposing gaseous wastes. 
  3. for disposing liquid wastes. 
  4. for burning hazardous wastes. 
  5. for disposing plastic wastes.

(ii) flow many gametes are produced from one cell during meiosis?

  1. Eight 
  2. Two  
  3. Four 
  4. Six 
  5. Ten.         

 

 

(iii) Which of the following is the excretory organ in human?

  1. Mouth 
  2. Kidney 
  3. Pancreas 
  4. Stomach 
  5. Anus.         

(iv) Which of the following hormones stimulates seed germination in plants?

  1. Gibberellins 
  2. Auxin 
  3. Cytokinins 
  4. Abscisic acid 
  5. Ethene.         

 

(v) A joint which allows rotation in all planes is called

  1.  suture
  2.  ball and socket
  3.  pivot
  4. ligament
  5.  hinge.

 

(vi)  A phylum consisting of species with jointed appendages and exoskeleton is known as

  1.  Chordata 
  2. Anelida 
  3. Arthropoda
  4. Platyhelminthesis 
  5. Nematoda.

 

(vii) Which part of the flower receives pollen grain during pollination?

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

 

(viii) A rapid growth in plants is mainly taking place in

  1. leaves 
  2. cambium
  3. roots
  4. shoots and root tips 
  5. stem. 

 

(ix) Which of the following is NOT a component of First Aid Kit?

  1. Razor blade 
  2. Panadol 
  3. Bandage 
  4. Soap 
  5. Microscope. 

 

(x) A part of an onion bulb which is important for vegetative propagation is

  1.  scale leaves
  2.  foliage leaves
  3.  terminal buds
  4.  roots
  5.  stem.

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.

LIST A

LIST B
  1. A stage of growth in humans, characterised by rapid growth and a lot of physical and mental changes.
  2. A type of seed germination whereby cotyledons are pushed above the ground.
  3. The ability of seeds to germinate
  4. The region of most active growth in plants.
  5. A type of seed germination whereby cotyledons remain beneath in the ground.
  1. Meiosis
  2. Metamorphisis
  3. Radicle
  4. Plumule
  5. Hypogeal germination
  6. Adulthood
  7. Dormancy
  8. Epigeal germination
  9. Adolescent
  10. Cotyledon
  11. Mitosis
  12. Micropyle
  13. Hard seed coat
  14. Stem and root apices
  15. Viability

 

SECTION B (60 Marks)

Answer all questions in this section.

3. (a) Give the meaning the following terms as used iri Biology:

  1. Blood transfusion.
  2. Blood compatibility.


(b) (i) State two advantages of blood transfusion.

(ii) Outline four precautions to be taken during blood transfusion

 

4. (a) List any four macro-elements in plant nutrition.

(b) Explain the causes of any three common disorders and diseases of the human digestive system.

 

5. (a) Name three type of muscles found in mammals.

 (b) Briefly explain how muscles are adapted to their role. Give three points.

 

6. (a) State three basic principles of waste disposal.

(b) Why poor waste disposal at home is said to cause adverse effects?

7.(a) Give the meaning of the following terms:

  1. Vegetative propagation.
  2. Gamete.

(b) Explain the merits and demerits of asexual reproduction in plants.

8. (a) What do you understand by the term “First Aid”?

(b) State how you would render First Aid to a person who has been shocked by electric current.

9. (a) Define the terms “digestion” and “feeding” as used in Biology.

 

(b) Explain why during digestion the food is:

  1. Alkaline when in the mouth.
  2. Acidic when in the stomach.
  3. Alkaline when in the ileum.
  1. (a) Define the term “osmoregulation”.

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

11. Outline merits and demerits of Lamercks theory of evolution.

12..  In the experiment conducted on single factor inheritance, individuals which were male homozygous tall married a female who was homozygous dwarf. The gene for tall was dominant over dwarf. Use the crosses to find out the possibility of the phenotypic results and the ratio in the first filial generation.


SECTION C (25 Marks)

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

13.(a) Explain the process of fertilization in flowering plants.

14. With the aid of illustrations, discuss the stages of mitosis.

15. Elaborate the causes of drug abuse to young people and advise the Tanzanian Government on the ways of combating drug abuse in the country.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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LEARNINGHUBTZ.CO.TZFORM FOUR BIOLOGY MODAL SERIES 18


   LEARNING HUB TANZANIA

MODEL EXAMINATION NEW FORMAT

CODE 033/1                                      BIOLOGY 1                     

INSTRUCTIONS         TIME 3:00Hrs 

     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 in section C. question thirteen (13) is compulsory.

3.      Except for diagrams which must be drawn in pencil, all writing should be in blue or black ink.

4.      Cellular phones and verbal communication are not allowed in the examination room.

5.      Write your examination number on every page of your Answer booklets.

SECTION A (15 MARKS)

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

i. Viruses are:-

  1. Eukaryotic
  2. Prokaryotic
  3. Both eukaryotic and prokaryotic
  4. Neither prokaryotic nor prokaryotic
  5. Multicellular organism
 ii. A colour blind woman marries a man with normal vision. What percentage of colour blind and normal children would be expected from such a marriage
  1. 100% Colour blind
  2. 75% Colour blind and normal
  3. 50% colour blind and 50% normal
  4. 25% colour blind and 75% normal
  5. 10% colour blind and 90% normal

iii. Which of the following is the most important basic difference between plants and animals?

A: Growth B. Nutrition C. Movement D. Irritability E. Reproduction

 iv. The type of growth where different part of the body grow at different rates and stop growing at different times is called:-

          A: Diffuse growth                                                 D. Intermittent growth

          B: Isometric growth                                                E. Allometric growth

C: Localized growth

v. Which of the following conditions would cause the adrenal gland to produce adrenaline hormone?

          A: Seeing a snake                   B. Playing a music C. Eating tomato          D. Smelling lemon

E: Eating tomato

 vi. Rise of the body temperature of the human body is corrected by:

          A: Dilation of the skin vein and sweating             B: Constricting of the skin vein and shivering

          C: Vasoconstriction and shivering                      D: Vasodilation and sweating

E: Constricting of hair erector muscle and sweating 

vii. Which food substance can be tested by using Sudan Ill solution?

         A: Protein                 B: Non — reducing sugar       C: Starch        D: Lipids

E: Carbohydrate 

viii. Which equation represents anaerobic respiration in animals?

A: C6 H12 06 + 602               6C02 + 6H20 + Energy

B: C6H1206 + 602                 12C02 + 6H20 + Energy

            C: 6C02 + 6H20                          C6H1206 + 602

            D: C6H1206                        2CH3CHOH.COOH + Energy

            E: C6Hl206                       C2H50H + 02 + Energy

ix.  After fertilization of an egg the product is formed as:-

            A: Zygote       B: Foetus                   C: Embryo                 D: Young baby          E: Child

x.    Structure with different original but performing the same functions are called

  1. Homologous structures
  2. Analogous structures
  3. Vestigial structures
  4. Rudimentary structures
  5. None of the above

2.     Match the phase 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 you answer booklet / answer sheet

 

LIST A

 

LIST B

 

 

(i). The theory of Natural selection proposer.

(ii).A group of organisms that freely interbreed to give rise to fertile offspring.

(iii). Remains of plants and animals.

(iv). The species that represent a modern man.

(v). Structures that lost their functions due to evolution.

A.

B.

C.

D. E.

F.

G.

H.

I.

Homo erectus

Homo sapiens

Organic structures Vestigial structures

Family

Species Specimens

Fossils

Charles Darwin

J.  Lamarck

 

i).

 ii)

iii

iv .

 v)

 

 

 

 

 









SECTION B: (60 MARKS)

Answer ALL questions in this section

Each Question in this section carries 6 marks

3.      (a) What is First Aid

(b)  Identify four components of first Aid Kit and their uses

(c)   Draw a well diagram of a First Aid box (kit)

4.      (a) Substance A occurs in mammalian blood, the substance will give brick red precipitates when boiled with Benedicts solution. Substance A can be converted into substance B which stored in the liver.

i.       Give the names of substance A and B

ii.     What is the role of substance A in the mammalian body?

iii.   Name the hormone involved in the conversion of substance A to substance B iv. Name the disease condition which will result when substance A is in excess in human blood.

(b)  Name the end product of digestion of the following food substances.

i.    Rice ii. Meat

5.      (a) Define sex — limited characters

(b)  Distinguish between tests cross and back cross

(c)   (i) write down the chemical composition of DNA

(ii) Give one different between DNA and RNA

6.      (a) Explain how the following features help in a birds

i. Lighter bones ii. Feathers iii. Stream lined body

(b)  Complete the table below by writing the location of the given joint in man

JOINT

LOCATION IN THE BODY

i. Pivot

 

ii. Ball and socket

 

iii. Hinge joint

 

7.      (a) i. List five (5) major groups into which organism are placed ii. List any two distinctive features of members of the kingdom to which a malaria vector belongs.

(b)  i. Identify by using common names, two types of flat worm found in the alimentary canal ii. To which kingdom does an organism in (b) (i) belong?

8.      a) What is an accommodation

(b)  Briefly explain the changes that take place in your eye when focusing near objects

(c)   Explain why a person become temporarily blind when moves from a bright light to a dim light

9.      An ecologist carried out survey to estimate the number of organisms in a certain dam the result is shown in the table below.

TYPE OF ORGANISM

ESTIMATED NUMBER OF ORGANISM

Plants

500,000

Small fish

120

Mosquito larvae

41,000

Crocodile

12

Large fishes

80

(a) Which of the above organisms are called

i.                     Producers ii. Primary consumer iii. Last consumer

(c)   Draw a simple ecological pyramid to the flow of energy among organism in the dam.

(d)  Which organisms are likely to be finished first in the dam? Give reasons to support your answer.


10.  a) What do you understand by the following?

i. Ovulation ii. Implantation

(b)  The blood of the mother and that of the fetus do not normally mix. Give four reasons why this is important to fetus.

1 1. a) Define the following

i. Photosynthesis ii. Photolysis

b)  i. List the conditions necessary for the process of photosynthesis ii. What are raw materials for the photosynthesis?

c)  State the location for the light and dark reactions

12. a) Name any four warning sign on the laboratory chemical containers

b)     State two main concepts in the cell theory

c)     What is the function ofthe following parts of the light microscope?

i. Mirror ii. Stage iii. Objective lenses iv, Diaphragm

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

13.  (a) If the liver is removed from a person is there any possibility Å  to survive?

b)     Give enough reasons to support your answer

14.  Write an essay on the various methods by which human  fectious diseases are transmitted.

15.  Discuss the economic importance of kingdom Plantae.






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