Your results on Biology 2010 are shown below

1. Which of the following organisms is not classified as an animal?

• amoeba.
• paramecium.
• euglena.
• obelia.

2. An organism that operates at the cellular level of organization, carries out its physiological activities by using its

• cell membrane.
• organelles.
• small size.
• cytoplasm.

3. The organelle which eliminates water from the body of a protozoan is the

• plasma membrane.
• contractile vacuole.
• nucleus.
• cellwall.

4. Which of the following cell types has the least number of mitochondria?

• cardiac cells of heart.
• cells of the cornified layer.
• muscle cells of the bladder.
• muscle cells of the diaphragm.

5. A typical plant cell is distinguished mainly from an animal cell by the possession of

• chloroplast and tract.
• cell wall and cytoplasm.
• chloroplast and cell wall.
• cell wall and mitochondrion.

6. Which of the following characteristics do fungi share in common with animals?

• presence of digestive tracts.
• movement from one place to another.
• storage of carbohydrate as glycogen.
• movement of centrioles during cell division.

7. Which of the following processes involves diffusion?

• opening and closing of stomatal pores.
• turbidity of herbaceous plants.
• absorption of water through the root hairs.
• absorption of digested food into the villi.

8. The mechanism of opening and closing of stomata in palnts is based on

• turgidity and diffusion.
• turgidity and flaccidity.
• osmosis and diffusion.
• diffusion and flaccidity.

9. In cellular respiration, energy is made available to organisms by

• removal of phosphate group from ADP.
• breaking off a phosphate group from ATP.
• adding a phosphate group to glucose.
• breaking off a hydrogen ion from NADPH.

10. Excretion in paramecium sp. is by diffusion because

• its habitat is water and moist places.
• it has simple, smal and few internal organs.
• it has a large surface area to volume ratio.
• it has a large efficient meganucleus.

11. The axial skeleton is composed of the

• skull and vertebral column.
• limbs and girdles.
• atlas and axis.
• radius and ulna.

12. The inorganic components of the bone consist of

• magnesium, sodium and calcium.
• magnesium, phosphorus and calcium.
• sodium, phosphorus and calcium.
• potassium, magnesium and calcium.

13. A pulse is best described as

• contraction of arteries to let out blood.
• contraction of veins to allow blood into them.
• dilation of arteries to accommodate blood rushing through.
• pumping action of the heart to move blood around the body.

14. The following characteristics are associated with the mammalian lungs except

• large surface area.
• expandable lungs.
• moist surface.
• highly vascularized.

15. The excretory system in mammals consists of the following parts except

• two kidneys.
• two ureters.
• two bladders.
• one urethra.

16. The organ that receives reduced flow of blood during vigorous exercise is the

• brain.
• heart.
• lung.
• limb.

17. The ear pinna is strengthened by

• blood pressure.
• cartilage.
• bone.
• turgor pressure.

18. The relationship between the retina and the brain is similar to that between the

• cochlea and the auditory nerve.
• cochlea and the brain.
• cochlea and the semi circular canals.
• eardrum and the brain.

19. Which of the following statements about the development of foetus is not correct?

• the circulatory system of the foetus is directly connected to the maternal blood vessels.
• the foetus depends on the mother’s blood for its food and oxygen.
• the foetus is surrounded by a water sac.
• food and oxygen are carried across the placenta to the embryo’s blood.

20. Use the diagram below to answer questions 20 and 21.

• e parts that supply food and water to the developing embryo are labelled
• I and II.
• III and V.
• V and VI.
• II and III.

21. The part labelled III is the

• albumen.
• chalaza.
• yolk.
• air space.

22. Which of the following statement is true about transpiration? it is the

• loss of water in form of vapour from the surface of the leaf.
• loss of water in the form of vapour from the surface of the root.
• absorption of water in the form of vapour from the body of the plant.
• movement of water through the body of the plant.

23. Transportation of water in the xylem tissue involves the following except

• root pressure.
• capillary action.
• transpiration pull.
• translocation.

24. The following are the major reasons why the butterfly lays eggs under the surface of a leaf except to

• shade the eggs from direct rays of the sun.
• protect the eggs from predators.
• protect the eggs from being washed away by rain drops.
• camouflage the eggs.

25. In which of the following organic compounds is the hydrogen-oxygen ratio equal to 2:1?

• protein.
• carbohydrate.
• lipids.
• vitamins.

26. A man suffering from obesity must avoid meals containing

• margarine and butter.
• rice and beans.
• carrots and oranges.
• beef and fish.

27. In testing for starch in a leaf, the leaf is first boiled in water for about a minute so that the

• cell walls are hardened.
• cells are killed.
• chlorophyll is dissolved out.
• iodine will penetrate.

28. Which of the following food substances is incorrectly linked to its enzyme?

• protein – trypsin.
• fat – lipase.
• sucrose – pepsin.
• starch – amylase.

29. Which of the following pH values is best for the action of the enzymes – renin and pepsin in the stomach?

• pH2.
• pH7.
• pH8.
• pH9.

30. The bacterium in a mutualistic association with legumes converts

• nitrates to ammonia.
• ammonium compounds to nitrites.
• nitrogen gas to ammonis.
• nitrites to nitrates.

31. A herbivore cannot feed on a peice of meat because it has no

• incisors to cut the meat.
• canines to tear up the meat.
• premolars to grind up the meat.
• molars to mash the meat.

32. In a particular habitat the role of an organism is referred to as its

• level.
• biomass.
• niche.
• space.

33. The distribution of organisms in a fresh water habitat like a stream or pond is determined by the following factors except

• light penetration.
• pH of the soil.
• rainfall.
• temperature.

34. The speed of wind is measured using the

• windvane.
• anenometer.
• photometer.
• barometer.

35. Which of the following is a biotic component of the ecoystem?

• soil.
• rainfall.
• light.
• fungi.

36. A moss plant can withstand drought by means of its

• spores.
• rhizoids.
• antheridia.
• achegonia.

37. Which of the following factors is the main problem facing xerophytic plants.

• competition for sunlight.
• conservation of excess water.
• inadequate roots for water absorption.
• lack of adequate water.

38. The following are green houses gases except

• carbon dioxide.
• chloroflorocarbon.
• methane.
• oxygen.

39. Rural- urban migration in developing countries can be prevented by

• increasing the number of years in school.
• putting up more factories in urban places.
• having borading schools in rural areas.
• even distribution of facilities in both regions.

40. Muscles are attached to bones by means of

• tendons.
• ligaments.
• cartilage.
• nerves.

41. In a population, food shortage may lead to

• an increased survival rate.
• high reproduction rate.
• intra-specific competition.
• low rate of migration.

42. The following effects are associated with deforestation except

• gully erosion.
• extinction of plant species.
• mighration of wild life.
• increase in rainfall.

43. The main reason for conservation of wild life is to create

• create national parks for recreation.
• maintain ecological balance in some communities.
• prevent hunters from being cruel to animals.
• save some species from extinction.

44. Which of the following is an example of variation?

• Blood.
• Tongue rolling.
• reproduction.
• growth.

45. The parameters of size, height, weight and colour in a population of living things are examples of

• environmental variation.
• non – heritable variations.
• continuous variations.
• discontinuous variations.

46. Finger prints are useful in crime detection because

• police have sophisticated finger print machines.
• thieves may leave their prints at the crime of the scene.
• no two people have the same finger print.
• finger prints are easy to make.

47. A person with blood group O can be given blood from persons who have blood belonging to

• group O only.
• group A only.
• groups A and O.
• groups A, B and O.

48. A man heterozygous for albino gene marries a woman who is also heterozygous for albino gene. Both have normal skin colour. The probability that they will have an albino child is

• 1/3.
• 1/4.
• 4/4.
• 2/4.

49. An example of saprophytic relationship is a/an

• vulture feeding on decaying meat.
• mushroom growing on decaying vegetation.
• boy eating stale bread.
• earthworm feeding on decaying vegetation.

50. Which of the following statements about heredity is not true? In heredity the traits are

• carried by the genes.
• contained in the ovum and sperm.
• always transmitted by one parent.
• transmitted from parents to offspring.

51. In artificial selection, individuals without desirable traits may be prevented from mating by

• outbreeding.
• sterilization.
• inbreeding.
• genetic engineering.

52. In a family of 8, all the children are girls. Which of the following reasons correctly explains this?

• the woman cannot produce male children.
• the man has a low sperm count.
• the Y component of the man’s sex chromosome was always involved.
• the X component of the man’s sex chromosome was always involved.

53. Which of the following statement is correct about the structure of a chromosome? A chromosome consist of

• two chromatids joined at the centromere.
• two chromatids joined at the spindle.
• two chromatin threads joined at the centrioles.
• thread like structures not joined together.

54. Mr Andrew, his wife and child belong to a blood groups A, B and O respectively.The genotypes of both parents are

• AO and BB.
• AA and BB.
• AB and AC.
• AO and BO.

55. What would be the phenotypic ratio of the offspring of a cross between a heterozygous dominant parent and a double recessive parent?

• 1:2:1.
• 1:1.
• 3:1.
• 2:1.

56. The percentage probability that a normal male married to a carrier female would have a haemophilic male child is

• 35%.
• 50%.
• 75%.
• 100%.

57. The importance of courtship in animals include the following except

• ensuring that the females choose the rigth male species.
• arousing both male and female partners.
• protection of territory.
• to coincide with the ovulation period and ensure fertilization.

58. In evolution, analogous structures are significant because they show

• physiological diversity.
• functional diversity.
• genetic diversity.
• structural diversity.

59. Which of the following staements reflects the theory of natural selection?

• there are variations within every species.
• individuals of every specie are genetically identical.
• no organisms in a species dies before sexual maturity.
• organisms with selective advantages are less likely to survive,

60. Which of the following animals exhibit territoriality?

• rabbit.
• earthworm.
• lizard.
• toad.

ANSWERS

1. C
2. B
3. B
4. B
5. C
6. C
7. D
8. B
9. C
10. C
11. A
12. B
13. D
14. B
15. C
16. A
17. B
18. B
19. A
20. C
21. B
22. A
23. D
24. D
25. B
26. A
27. B
28. B
29. C
30. A
31. D
32. B
33. C
34. B
35. B
36. A
37. D
38. D
39. D
40. A
41. C
42. D
43. D
44. B
45. C
46. C
47. A
48. B
49. B
50. C
51. B
52. D
53. A
54. D
55. B
56. B
57. D
58. A
59. A
60. C