PRESIDENT’S  OFFICE, REGIONAL ADMINISTRATION AND LOCAL GOVERNMENT

SECONDARY EXAMINATION SERIES

BIOLOGY FORM FOUR

MID-TERM EXAMS – AUGUST – 2023

TIME: 2:30 HRS

INSTRUCTIONS 

SECTION A 

1. For each of the questions (i) – (x) choose the correct answer from alternatives given

1. George has a passion to study bacteria, viruses, Protozoa and other small organisms in future, which branch of Biology is he interested?

1.  Mycology
2. Virology
3.  Microbiology
4.  Monera
5. Virology

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

1.  78 before meiosis, 29 after meiosis
2. 39 before meiosis 49 after meiosis
3.  78 before meiosis 79 after meiosis
4.  76 before meiosis 39 after meiosis
5. 76 before meiosis 152 after meiosis

3. Which part of human alimentary canal performs the same function as gizzard in chicken

1.  The appendix
2. The ileum
3.  The gall bladder
4.  Stomach
5. Salivary glands

4. Which cell structure below is sight for production of energy in plants

1.  Ribosome’s
2. Mitochondria
3.  Chloroplast
4.  Nucleus
5. Vacuole

5. Moses was operated and Part of his reproductive system removed. He could not produce sperms. Which part was removed

1.  Sperm duct
2. Epididymis
3.  Scrotum
4.  Somniferous Tubular
5. Vas deferens

6. The part of mammalian eye that controls shape and curvature of lens is?

1.  Iris
2. Ciliary
3.  Conjunctiva
4.  Suspensory ligament
5. Pupil

7. Identify actions which regulate temperature in mammals

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

8. The part of microscope that is responsible for viewing finer details in a specimen is

1.  Condenser
2. Diaphragm
3.  Fine adjustment knob
4.  Objective lens
5. Course adjustment knob

9. If a plants cell is placed in hypotonic solution, it experience a biological condition called;

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

10. 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 cell B?

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

2. Match part of female reproductive system in List B with its function in List A and write the correct answer on spaces provided.

SECTION B (54 Marks)

Answer all questions 

3. Figure below shows a plant root study the diagram and answer questions that follow.

(a)

1. Name group of plant represented by diagram in figure 1.
2. Give any two examples of plants which can be found in group of plants mentioned in (a) above
3. Name the Organism which inhabit the swelling of the roots
4. What is the name of the relationship existing between the plant and the organism mentioned in (a)(i) above

(b)Name the bacterium which does the Nitrogen fixation cycle

(c)Suppose your biology teacher organizes a study tour to Manyara National Park During your visit, You observe the following Organism, vulture antelope, shrubs, cheater, and wildebeest. As a form four student draw a diagram that represents the food web and two food chains from these organisms.

4. A bread was left on a cupboard, after 3 days white things were seen with club like structures at the top. As a student

1. Identify the organism immersed on the bread
2. Name the kingdom and phylum of the Organisms.

(b)Mention any three (3) distinctive features of the kingdom to which mushroom belong 

5. (a)Explain in one sentence why the following feature occur to these organisms

1. Streamlined body of birds
2. Ciliated trachea of human
3. Needle-like leaves of plants found in desert
4. Coiled and elongated ileum in humans

(b)An engineer needs to approve a building to be used as biology laboratory

1. What is biology laboratory
2. List 4 (four) qualities which he/she must consider in order for that building to be considered as good biology laboratory

6. (a)Give the hormone responsible for each of the following biological processes

1. Development of male sexual characteristics
2. Development of female sexual characteristic
3.  prepares the body for fight or flight response
4. Raised blood sugar level
5. Initiate labour pain

(b)Nervous coordination differs from hormonal coordination. Explain in four (4) points 

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

1. What name is given to this type of pregnancy
2. What are the causes of this type of pregnancy
3. In which ways do the ways do the Ummu Ayman kids different from Alwiya’s kids?

8. (a)The diagram below illustrates a specialized cell obtained from a certain tissue

1. Name the cell
2. State two ways in which the cell is structurally adapted to its function

(b) State the role of each of the following in the mammalian respiratory system

1. Mucus
2. Cartilage rings
3. Epiglottis

SECTION C (30 Marks)

Answer only two questions 

9. Six year old 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 transmission mode
2. Effects
3. Prevention (any 4 points)

10. (a)A female human being was found to have an extra sex chromosome in her cells

1. Give the total number of chromosomes in the female individual cells
2. Explain the possible cause of this condition
3. State physical characteristics observed in the female individual with such a condition

(b)Explain why fossil records as evidence of organic evolution are usually incomplete

(c)Name the evidence of similar amino acid molecules in a range of Organisms

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

THE PRESIDENT’S OFFICE MINISTRY OF EDUCATION, REGIONAL ADMINISTRATION AND LOCAL GOVERNMENT

COMPETENCY BASED SECONDARY EXAMINATION SERIES

BIOLOGY

FORM FOUR- SEPT 2022

BIOLOGY 01

CODE 033/1

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 (2) questions from section C of which question thirteen (13) is compulsory with 15 Marks.
3. Section A carries fifteen (15) marks, section B carries(60) Marks and section C carries(25) Marks
4. All writings should be in blue or black pen except for diagrams that should 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 sheet.

SECTION A: (15 MARKS)

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 he answers booklet provided.

1.    The taxonomy category  of organisms belonging to the same class but not the same family is___________
   1. Kingdom      
   2.  order
   3.  phylum   
   4.  genus     
   5. Specie
2.    A joint which allows movement in one direction is called:
   1. Gliding joint
   2. Ligament
   3. Pivot joint
   4. Ball and socket joint
   5. Hinge joint
3.    Apart that anchor the mushroom and also enable it to absorb nutrients:
   1. Hyphae
   2. Pileus
   3.  Gills
   4. Stalk
   5. Body parts 
4.    Bacteria in the caecum of ruminants digest cellulose. This is an example of______
   1. Mutualism
   2. Saprophytism
   3. Parasitism
   4. Commensalism
   5. A and D above are correct
5.    Which substance in tobacco combine with hemoglobin to prevent hemoglobin from carrying oxygen.
   1. Tannins
   2. Cannabis
   3. Nicotine
   4. Carbon monoxide
   5. Carbon dioxide
6.    Enzymes that hydrolyze starch to maltose
   1. Rennin
   2. Amylase
   3. Peptidase
   4. Sucrose
   5. lipase
7.    Which part of the seed grows into a root system of a plant
   1. Micropyle
   2. Plumule
   3. Radical
   4. Hilum
   5. Cotyledon
8.    A term which best describes a condition of a plant that lost too much water is
   1. Crenation
   2. Plasmolysis
   3. Hemolysis
   4. Osmosis
   5. Turgidity
9.    Why is it advised to build an incinerator in every hospital and health centers?
   1. For disposing gaseous waste
   2. For collection of waste
   3. For disposing liquid waste
   4. For burning hazardous waste
   5. For storage of waste
10.    HIV and AIDS has spread all over the world. This implies that it is
    1. Transmittable
    2. Pandemic
    3. Endemic
    4. Sporadic
    5. Epidemic

2. Match the response in LIST B with the phrase in LIST A by writing the letter of the correct response besides the item number of LIST A in your answer sheet.

SECTION B: (60 MARKS)

Answer all questions in this section

3. (a) (i) Name three types of muscles found in mammals

    (ii) Which of the muscle named in a (i) is a voluntary muscle?

(b)  Yesterday in the evening Hanna’s muscles became hard, knotted and she experienced a lot of pains. What do you think was a cause and give solutions?

4.  (a) With examples differentiate between pandemic and epidemic diseases.

       (b) How can the body immunity be affected?

5. (a)Explain effectively why pituitary gland is said to be the master gland?

(b)How does the endocrine system differ from the exocrine system? Give vivid explanation

        (c)  What will happen if:

1. Semi-circular canal is damaged
2. Under-secretion of thyroxin hormone at age of 3 years.

6. (a) (i) briefly explain why do biologists prefer to use light microscopes in the laboratory rather than using normal eyes.

(ii) State three (03) factors that determine the volume, color, odor, of urine and frequency 
of urination.

(b)The effect of constructing a laboratory aims at rising students’ performance in science subjects:

1. Define biology laboratory
2. Name four specimen expected to be found in the laboratory.

7. Study the figure below that illustrates a feeding relationship in an ecosystem. The arrow means “eaten by” then answer the questions below

1. i. What is the name given to the feeding relation in the figure above?

ii. Which important group of organisms should be included in the diagram to make the ecosystem balanced?

iii. Of what importance is the missing group named in a (ii) above to the feeding relationship?

2.                       Giving reasons identify one organism in the figure which is

1. First trophic level
2. Prey and Predator
3. A secondary consumer

8. (a)  What do you understand by the following terms
   3. Evolution
   4. Vestigial organs with examples

2. State any three (03) theories which explain the origin of life.

9. The diagram below shows the development of follicles at different stages inside the ovary

1. Name the structure labeled A, B and C.
2. (i) What kind of hormone is secreted by the structure labeled A

(ii) What roles the hormone produced in A play in human reproduction

(iii) State the biological term used to describe the release of the structure labelled C in the funnel of oviduct.

(iv) In which specific organ does this process take place?

10.       (a)Mr. Lesema is homozygous tall; he married a female who is homozygous dwarf, if     the gene for tallness was dominant over dwarfness.  Use Mendelian crosses to determine the phenotypic ratio in the first filial generation.

             (b)Give the meaning of the following terms

                    i.      Somatic cells

                   ii.       Continuous variation

                  iii.       Turner syndrome 

11. (a)Define the term osmoregulation.

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

12. (a) i. What are three adaptations of White blood cells for their function?

   ii. What cause and how agglutination occurs?

(b) Analyze any three adaptations of the muscles found on the Heart

SECTION C: (25 Marks)

Answer two (02) question in this section number 13 is compulsory

13. Explain four advantages and three disadvantages of blood transfusion then provide at least two precautions to taken during blood transfusion.(15 marks)

14. Explain how mammals regulate their internal body temperature in response to external environment changes (10 Marks).

15. Evaluate any four birth control methods (10 Marks)

THE PRESIDENTS 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.

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.