Your results on Biology 2013 are shown below

1. In which of the following levels of classification are the members most similar?

• order
• genus
• species
• phylum

2. The diagram  below represents a

• a cell
• filament
• colony
• part of a living organism

3. Pyrenoid is present in the structure labelled

• IV
• III
• II
• I

4. Spirogyra is regarded as a multicellular plant because

• the cylindrical cells are linked end to end
• its cells are linked together by cytoplasmic strands
• its cells are large
• it is an algae containing a large vacuole

5. Which of the following pairs of structures in living organisms do not perform similar functions?

• lungs and spiracles
• root hairs and mammalian hairs
• feathers and scales
• contractile vacuoles and kidneys

6. Which of the following sequences is the correct arrangement of tissues in the anatomy of a young dicotyledonous stem from inside to the outside?

• pith, phloem, cambium, xylem, parenchyma, collenchyma and epidermis
• xylem, phloem, cambium, corte, endodermis, collenchyma and epidermis
• pith, xylem, cambium, phloem, collenchyma, parenchyma and epidermis
• phloem, xylem, cambium, cortex, endodermis, collenchyma and epidermis

7. An animal which possesses scales, nares and backbone is likely to be a

• toad
• lizard
• rat
• bat

8. The opening of guard cells in the epidermis of plants is by the process of

• osmosis
• diffusion
• active transport
• transpiration

9. What happens to a plant if the shoot tipis cut off and replaced by an agar block containing auxin? It will

• stop growing
• grow rapidly
• continue to grow rapidly
• die completely

10. Anaerobic respiration results in the production of

• more energy than aerobic respiration
• no energy
• an equal amount of energy to aerobic respiration
• less energy than aerobic respiration

11. Which of the following is not a skeletal tissue?

• plasma
• chitin
• cartilage
• bone

12. Which of the following statements is not correct about the mammalian heart?

• oxygenated blood enters the left auricle from the pulmonary vein
• the walls of the ventricle are thicker than those of the auricle
• blood passes from the right ventricle to the left auricle through the aorta
• the tricuspid valve prevents the back flow of blood into the right auricle

13. Which of the following organs are used for gaseous exchange in a mature toad?

• gills, lungs and eardrum
• lungs, mouth and eardrum
• mouth, skin and gills
• skin, lungs and mouth

14. Which of the following structures is used for respiration in insects?

• lungs
• thorax
• curticle
• spiracle

15. Which of the following statements about the diaphragm of a mammal is not correct? It

• separates the thorax and the abdomen
• is a thick layer of muscle
• is made of epithelial cells
• is part of the human respiratory apparatus

16. A substance present in the glomerular filtrate in the mammalian kidney is

• glucose
• fibrinogen
• albumen
• blood platelets

17. In human’s, excretion of the hypertonic urine is associated with

• distal convoluted tube
• loop of henle
• bowman’s capsule
• proximal convoluted tube

18. The maintenance of a stable internal environment within the body of a mammal is known as

• osmosis
• plasmolysis
• homeostasis
• excretion

19. Which part of the nephron is associated with ultra-filtration?

• distal convoluted tube
• proximal convoluted tube
• collecting duct
• boman’s capsule

20. Which of the following conditions would result in a decrease in the production of anti-diuretic hormone?

• abnormally high blood sugar level
• drinking large quantities of water
• increase in osmotic pressure of blood
• period of strenuos exercise

21. Which of the following structures is not essential in a wind pollinated flower?

• anther
• ovary
• stigma
• petal

22. Study the diagram below and answer questions 22 – 24.

Which part of the flower produces the structure labelled III

• carpel
• pollen
• stigma
• anther

23. The parts labelled III and IV respectively are called

• pollen tube and style
• pollen grain and pollen tube
• anther and filament
• stigma and style

24. Which of the labelled parts would become a component of the seed after fertilization

• I
• II
• IV
• V

25. The resolution of a microscope refers to its power to

• increase an object’s apparent size
• distinguish clearly between objects
• scan the surface of an object
• focus on an object

26. The process by which plants manufacture food from carbon dioxide and water using energy from the sun is called

• chemosynthesis
• photosynthesis
• anabolism
• catabolism

27. Conduction of water and mineral salts through the xylem vessels is enhanced because the xylem cells are

• thickened with lignin
• long, narrow tubes placed end to end
• close to the endoderms
• centrally placed in the roots

28. Which of the following factors is likely to increase the rate of transpiration in plants?

• a reduction in the number of stomata per unit surface area
• increase in humidity around the leaves of plant
• an increase in leaf surface area to volume ratio
• removal of leaves from plant

29. The name of the enzyme that catalyzes glucose conversion to glucose-6-phosphate at the beginning of glycolysis is

• phospho-fructokinase
• glucose isomerase
• hexokinase
• glucose-6-kinase

30. The correct arrangement of food classes of the same quantity in the order of magnitude of energy value in animals in descending order is

• carbohydrates, fats, oil, water, protein
• fats, oil, carbohydrates, protein, water
• water, fats, oil, carbohydrates, protein, water
• protein, fats, oil, water, carbohydrates

31. Which of the following substance is not a complex carbohydrate?

• glycogen
• cellulose
• starch
• glucose

32. Which of the following associations is an example of epiphytism?

• lice in the human hair
• mistle toe on citrus fruit
• egret on cow
• fern on palm tree

33. Study the diagram and answer questions 33 and 34.

What is the likely food of bird I?

• worms
• seed
• nectar
• fishes

34. The food of bird II is

• worms
• seed
• nectar
• fishes

35. Ecology simply means the study of

• particular species ofplants and animals
• interrelationship between organisms and their environment
• the properties of a habitat
• the inter-relationship between plants and animals

36. The maximum size of a popilation that any given area can support is known as

• population density
• carrying capacity
• population growth
• maximum population

37. The producers in a food chain in an aquatic environment are

• birds
• phytoplankton
• zooplankton
• fishes

38. The frog is considered a better swimmer than the Toad because it

• has more pronounce webbed digits
• has much stronger and longer hind limbs
• lives in water most of the time
• is more streamlined than the Toad

39. The Bacteria that reduce nitrates in the soil gaseous nitrogen are referred to as

• nitrifying bacteria
• denitrifying bacteria
• putrefying bacteria
• saprophtytic bacteria

40. A pyramid of numbers is constructed by

• comparing living and non-living things
• measuring productivity
• conducting census
• labelling the organisms

41. The main reason for immunizing children is to

• destroy pathogens in their bodies
• increase the production of white blood cells
• stimulate the production of antibodies
• stimulate the production of antigens

42. Rhizobium which lives in the root nodules of leguminous plants is an example of the association known as

• commensalism
• epiphytism
• mutualism
• sapropytism

43. Acscaris lumbricoides is a parasitic

• flatworm
• round worm
• arthropod
• elastic worm

44. The following organisms are pests of plants except

• birds
• nematodes
• rodents

45. The absence of alimentary canal in the parasitic flatworm can be attributed to the fact that

• its body does not feed
• it has no enzymes
• its body absorbs digested food
• it has suckers on the solex

46. Which of the following human activities would help prevent endangered species from extinction?

• uncontrolled gardens
• regular clearing of the forest vegetation
• temporary maintenance of species in zoological gardens
• regular irrigation of their natural habitats

47. Which of the following statements is not a reason for conserving wildlife?

• attraction of tourists into the country
• serving as a source of food
• serving as a source of income
• increasing the amount of rainfall

48. In genetics, linkage refers to the linking of the gene of the

• same chromosomes
• different chromosomes
• same nucleus
• different nuclei

49. A man’s blood group is AB. What is the probability of the man giving birth to a child with blood group O?

• 0%
• 25%
• 50%
• 100%

50. When a man who is Rh-positive marries a woman who is Rh-negative, there will be incidence of

• still births
• sicklers
• albinos
• living children

51. The genotype ratio of the offspring of a hybrid ie 1:2:1, which of the following laws illustrates this ratio?

• use and disuse
• dominance
• segregation
• linkage

52. A gene that is located on the X-chromosome is said to be

• expressed in females only
• defective
• sex-linked
• expressed in males only

53. If a boy has blood type O and his mother has blood type A, what is the genotype of the father?

• bb
• aa
• ao
• ab

54. A man who suffers from haemophilia marries a woman who is a carrier, what percentage of their children are likely to be haemophilia?

• 25%
• 50%
• 75%
• 100%

55. Which of the following traits may be considered in marriage counselling?

• height
• finger prints
• rhesus factor
• colour of skin

56. Which of the following structures is formed during cell division in animal cells?

• cell membrane
• cytoplasm
• centrosome
• ribosome

57. The function of the drone in a colony of bees is to

• clean the cells
• mate with the queen
• protect the colony
• lay eggs

58. Which of the following features is used by chameleons to escape predation?

• fearsome appearance
• coiling tail
• offensive smell
• adaptive colouration

59. A scientist who was involved in the development of evolution theory is

• lamarck
• mendel
• morgan
• pasteur

60. Darwin noticed that organisms in similar habitats across the world looked alike. This illustrates

• convergent evolution
• adaptive radiation
• co-evolution
• descent with modification

ANSWERS

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