1. Which of the following statements
about living things is correct? A. Animals respire using carbon (IV) oxide as a raw material B. Growth in plants is limited after some time C. Most plants respond to stimulus slowly D. Higher animals can reproduce asexually

2. Organ level of organization in living
things is found in A. water leaf plant.
B. virus particle. C. kidney. D. spermatozoon.

Diagrams X and Y below are illustrations of transverse sections of a part of plants. Study them and answer questions 3 to 5.

3. Which of the following statements is not correct? Diagrams X and Y are
sections of A. roots. B. a dicotyledonous root and a monocotyledonous root respectively. C. vascular bundles. D. stems.

4. The part responsible for conducting
water and dissolved mineral salts from
the soil to the leaves is labelled A. I. B. II. C. III D. IV.

5. The part labelled II is the A. pith. B. xylem. C. phloem. D. endodermis.

6. The organelles in cells which are also referred to as suicidal bags are the A. mitochondria. B. lysosomes. C. ribosomes. D. nuclei.

7. The process that brings about the
shrinking of a Spirogyra cell when
placed in a strong solution is A. osmosis. B. autolysis. C. plasmolysis. D. diffusion.

8. The region of a plant stem in which
cells divide to increase its diameter is
the A. cambium. B. phloem. C. xylem.
D. collenchyma.

9. The total number of caudal vertebrae
in animals X and Y is 4 and 27 respectively. The animals are likely to be A. fish and human. B. toad and rat. C. toad and fish. D. humans and rat.

10. Which of the following blood components has the greatest affinity for oxygen and carbon (IV) oxide? A.
Lymphocyte B. Erythrocyte C. Blood
plasma D. Thrombocyte

Use the following processes to answer
questions 11 and 12.
I- Ribs move upward and outward
II- Diaphragm relaxes
I- Volume of thorax increases
IV- Air is forced out of the lungs

11. Which of the processes take place
during inspiration? A. I and III only B.
l and Ill only C. II and IV only D. III and IV only

12. Which of the processes is a direct result of contraction of the intercostal
muscles? A. I B. II C. III D. IV

13. The process by which the amount of water and solutes in the blood are controlled is known as A. haemolysis. B. diffusion. C. turgidity. D. osmoregulation.

The table below shows the effect of
hormones I, II, III and IV on some
parts of the human body. Where (✓)
represents effect and (x) represents no
effect of hormone on the corresponding part of the body. Study it and answer questions 14 and 15.

14. Which of the following hormones are I, II, III and IV respectively? A. ADH, Glucagon, Oestrogen, Adrenaline B. Adrenaline, Glucagon, Oestrogen, ADH C. Glucagon, ADH, Oestrogen, Adrenaline D. Adrenaline, ADH, Oestrogen, Glucagon

15. The hormone responsible for anxiety is A. I. B. II C. IM D. IV

The diagram below is an illustration of some parts of a mammalian car. Study it and answer questions 16 to 18.

16. The parts labelled I are the A. semi circular canals. B. ossicles. C. cochlea D. external auditory meatus.

17. Which of the parts are correctly
grouped? inner ear Middle ear Outer ear

18. The middle ear is connected to the pharynx by the part labelled A.. I. B. II C. III D. IV.

The diagrams below are illustrations
of two different cells involved in a biological process in mammals. Study them and answer questions 19 to 21.

19. Which parts of P and Q fuse to complete the biological process’? A. III and I. B. IV and I C. III and II D. IV and I

20. Which of the following statements
about P and Q is correct? A. Both cells
are structures for asexual reproduction B. Both cells normally belong to the same individual C. Both cells are found in plants D. The union of both cells gives rise to a new mammal.

21. If the number of chromosomes in the skin cells of mammals is 46, how
many chromosomes would be found
in P and Q respectively? A. 23 and 23
B. 23 and 46 C. 46 and 23 D. 46 and 46

22. In which of the following structures is simple sugar produced? A. Vacuole B. Cytoplasm C. Chloroplast D. Cell wall

23. An evidence of the occurrence of photosynthesis in an experiment is the A. release of carbon (IV) oxide. B. release of Oxygen. C. formation of water molecules. D. formation and release of fructose.

24. The major sources of vitamin A are A. egg yolk, carrot and palm oil. B. mango, pawpaw and eggs. C. sorghum, soya bean and liver. D. rice bran, green vegetables and milk.

Diagram J is a protease while diagrams K, L, M and N are food substances. Study them and answer questions 25 to 27.

25. Which of the illustrated food substances would form a reaction with protease J? A. KB. LC. M D. N

26. Protease J would react with the particular illustrated substance because enzymes A. are denatured at a high frequency. B. are specific in their action. C. remain unchanged after a reaction. D. speed up the rate of chemical reaction.

27. After a reaction between protease J and the food substance, the end-product would be A. fatty acids. B. glucose. C. amino acids. D. water.

28. The property of clayey soil that prevents it from supporting thick vegetation is its A. composition of chemically weathered granite rocks. B. inability to retain much water. C. tendency of becoming waterlogged. D. porosity and low water-retention ability.

29. Which of the following practices will not maintain soil fertility? A. Preventing soil erosion B. Bush fallowing C. Leaving the land bare D. Planting cover crops.

30. A group of organisms of the same
species living in a particular place is
known as A. colony. B. community. C.
ecosystem. D. population.
The diagram below is an illustration
of an experiment on sedimentation of
soil. Use it to answer questions 31 and
32

31. The organic component of the soil is labelled A. I. B. II C. III D. IV

32. The part labelled IV is A. silt. B. sand. C. humus. D. clay.

33. Which of the following pyramids is not used in ecology? Pyramid of A
energy B. numbers C. biomass D. organisms.

Study the food chain illustrated below
and use it to answer questions 34 to
36

34. Organism J is normally sustained by energy from A. green plants. B. carbohydrates. C. organism K. D. sunlight.

35. Which of the following statements
about organism L is correct? It A.
feeds on organism MB. is a primary
Consumer C. is the producer D. is a
secondary consumer

36. The position occupied by each of organisms J, K, L, M and N in the food
chain is known as the A. energy level. B. trophic level. C.
food web. D. pyramid of numbers.

37. Which of the following features is not an adaptation of plants to aquatic habitats? A. Breathing roots for entry of air B. Flowers are raised above water to attract pollinators C. Spongy tissues containing gases for buoyancy
D. Hairy structures on the leaves to
reduce water loss

38. The biological association that contributes directly to succession in a
community is A. competition. B. predation. C. parasitism. D. commensalism.

39. The conservation of natural resources is enhanced by the following practices except A. controlling farming activities. B. protecting endangered species.
C. poaching in game reserves D. establishing parks and gardens.

40. The burning of farmlands should be discouraged because it A. destroys the organic components of the soil. B. increases the population of wild animals on the farm. C. increases the dormancy period of some seeds. D. destroys some plant pests.

41. The use of a lighter instead of match sticks is a way of conserving A. petroleum. B. forest. C. water. D. wildlife.

42. An accident victim was successfully transfused with blood from the father whose blood group is AB. The blood group of the accident victim is A. B, . B. O,. C. AB,. D. A,.

43. Which of the following traits in humans is an example of physiological variation? A. Skin colour B. Fingerprint C. Tongue rolling D. Height

44. Individuals belonging to blood group O are universal donors because A. antigens are absent in their blood cells. B. members of the group constitute the highest number of humans. C. there are no antibodies in their blood plasma. D. the antigens in their blood cells are easily destroyed.

45. Two tall plants were crossed and all the F1 plants were tail. When the F1 plants were selfed, some of the F, plants were tall while others were short. What are the possible genotypes of the original plants? A. Tt and tt B. TT and TT C. tt and tt D. TT and Tt

46. Which of the following statements
best describes a test cross? It is A. to
determine the genotype of an individual whose phenotype is known B. to determine the phenotype of an individual whose genotype is known
C. between the progeny of parents to
ascertain their external expressions D. between two homozygous recessive
individuals to confirm the genotypes
of the offspring.

47. Which of the following statements
about sex-linked traits is not correct?
A. Males inherit sex-linked traits from
their fathers B. Sex-linked traits are
more common in males C. Females
can be carriers because they can be
heterozygous for the trait D. Males are
never carriers since they only receive
one sex chromosome

48. When two carriers of sickle cell anaemia produce an offspring, the probability of the offspring being a sickler is A. ¾ B.¼ 4 C. ½ D ⅔

49. Which of the following organisms exhibits adaptive colouration? A. Rabbit B. Chameleon C. Mouse D. Dog

2022 BIOLOGY THEORY QUESTION

1ai)What is a cell?
(ii) Name three scientists that are associated with the discovery of the cell.
bi) Make a diagram, 6cm to 8cm long of a plant cell and label only the organelle responsible for cell reproduction.
ii) Name one blood cell in humans that does not have the organelle in bi).
iii) What is the biological implication of the cell named 1b(ii) not possessing
the organelle responsible for cell reproduction?
(c) List six organelles found in a plant
cell.

2 (a) Complete the table by ticking (✓) the appropriate group to which each of the listed elements required by plants belongs.

(ii) four differences between the dentition of a human and a goat.

(c) What are milk teeth?

3a(i) What is an ecological niche’?
i) State five roles played by a mango tree in its ecological niche.
bi) State two reasons why ecologists use sampling techniques in population studies.

ii) State four examples of sampling techniques used in population studies.
(c) Name four types of fingerprints in humans.
di) Name the plant used by Gregor Mendel in his experiment.
ii) State two reasons why the plant name in 3d(i) was used

4a(i)What are conservation laws?
ii) State three conservation laws.
bi) State two reasons why animals are
poached
i) Name five animals that are commonly poached.
c) State four effects of excessive use of
the forest.

(d) Explain briefly the following terms:
i) blood transfusion,
ii) antigen.

SECTION B

5a(i)State three differences between the alimentary canals of earthworm and cockroach.

(i) State three similarities between the
alimentary canals of earthworm and
cockroach.

(ii) The diagram below is an illustration of a biological cycle. Study it and answer questions 5b(i) to 5b(iii)

) Name the biological cycle.
(ii) Explain briefly three roles played by plants and animals in the cycle.
(ii) Name the processes that occur in X, Y and Z.

X:
Y:
Z:

(c) Complete the table below.

di) What is decay of organic matter?
(ii) Name two groups of organisms that cause decay of organic matter.
iii) State one other factor that causes decay.
(iv) Name the biological cycle that involves decay.
(e) Explain briefly the mode of nutrition in carnivorous plants.
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