WAEC - Biology (2000)

• 1

  Amoeba obtains its oxygen requirements

  回答

  (C)

  through diffusion of air into its body
• 2

  Which of the following best describes a colony of volvox?

  回答

  (A)

  Asexually reproduced cells held together in a mass, but independent of each other
• 3

  The hydra has two body layers of cells called

  回答

  (B)

  ectoderm and endoderm
• 4

  All the following organelles have membranes except

  回答

  (D)

  cell wall
• 5

  Which of these has the most complex level of organization?

  回答

  (C)

  Heart
• 6

  The unit contained in a cell structure responsible for changes in form and shape of organisms is called

  回答

  (B)

  gene
• 7

  The plant cell mostly stores food as

  回答

  (D)

  starch
• 8

  The presence of a large member of mitochondria in a cell indicates that

  回答

  (B)

  the cell is very active
• 9

  Which of the following statements is incorrect about diffusion?

  回答

  (D)

  Molecules move from region of lower concentration to that of higher concentration.
• 10

  In which of the following organisms is ammonia excreted as a waste product?

  回答

  (C)

  Amoeba
• 11

  The following are the functions of supporting tissues in plant except

  回答

  (D)

  secretory
• 12

  Which of the following organisms has the largest surface area-to-volume ratio?

  回答

  (C)

  Amoeba
• 13

  Which of the following plant parts does not perform supportive function?

  回答

  (B)

  Epidermis, sclerenchyma and xylem
• 14

  The following are useful effect of micro-organisms except

  回答

  (D)

  decay of meat
• 15

  Which of the following structures is not present in the vascular bundles of a dicot stem?

  回答

  (C)

  lntra-fascicular cambium
• 16

  When a mammal respires anaerobically for a long time

  回答

  (C)

  lactic acid accumulates in the muscles
• 17

  

  Which of the labelled structures in the diagram are involved with the entry
  of carbondioxide for photosynthesis?

  回答

  (B)

  I, II, III and VI
• 18

  

  Which of the labelled structures in the diagram will shrink when plasmolysis
  occurs?

  回答

  (A)

  I
• 19

  

  The condition shown in the above diagram is due to

  回答

  (C)

  excess water in structure labelled I
• 20

  

  Which of the following solutions will induce the condition shown in the diagram?

  回答

  (B)

  Hypotonic solution
• 21

  Which of the following conditions will cause a decrease in body temperature?

  回答

  (D)

  Relaxation of the erector muscles
• 22

  The organs constantly in touch with the liver are

  回答

  (D)

  stomach and gall bladder
• 23

  Which of the following is responsible for the increased heart beat of a boy who saw a python? increased
  production of

  回答

  (A)

  adrenalin
• 24

  The nerves that arise from the brain are known as

  回答

  (C)

  cranial nerves
• 25

  The neurone that relay the message of effector organs are called

  回答

  (A)

  efferent neurones
• 26

  Each neurone consists of the following structures' except

  回答

  (D)

  white matter
• 27

  The simplest form of nervous pathway which links receptors with effectors is known as the

  回答

  (B)

  reflex arc
• 28

  Which of the following parts of the eye is sensitive to light?

  回答

  (A)

  Retina
• 29

  What happens to an ovule of a flower, after fertilization? It

  回答

  (C)

  becomes a seed
• 30

  Which of the following is not a dry indehiscent fruit?

  回答

  (A)

  Legume
• 31

  Which of the following groups consists of only micro-nutrients?

  回答

  (C)

  Manganese, molybdenum and zinc
• 32

  The first stable product of photosynthesis is

  回答

  (B)

  glucose
• 33

  Which of the following statements about nitrogen is not correct? Nitrogen is needed for

  回答

  (B)

  activating certain enzymes
• 34

  A very poor growth in plants and discolouration of leaves signifies the deficiency of

  回答

  (C)

  potassium
• 35

  Vitamin C which is water soluble is

  回答

  (C)

  ascorbic acid
• 36

  Vitamin C deficiency results in

  回答

  (C)

  scurvy
• 37

  Members of the vitamin B complex are

  回答

  (A)

  water-soluble
• 38

  Which of the following statements about phosphorous is not correct?

  回答

  (A)

  Helps to regulate the acid-base balance of the body
• 39

  Vitamin E is concerned with

  回答

  (B)

  reproduction
• 40

  A balanced meal for an adult person may consist of

  回答

  (C)

  four slices of yam and stew, two pieces of beef, one cup of tea with milk and two oranges
• 41

  Which of the following food substances turns bright red when warmed with suddan III solution?

  回答

  (D)

  Fat
• 42

  Mammals require a relatively high amount of carbohydrates because

  回答

  (D)

  they yield energy for activities.
• 43

  All the available places on earth which support life constitute the

  回答

  (C)

  biosphere
• 44

  The abiotic factor which determines the depth to which light penetrates in a pond is

  回答

  (B)

  turbidity
• 45

  Which of the following organisms is a producer?

  回答

  (A)

  Spirogyra
• 46

  Which of the following groups consists of heterotrophs?

  回答

  (C)

  Man, Mucor and Mushroom
• 47

  Which of the following organisms will not bring about decomposition?

  回答

  (D)

  Spirogyra
• 48

  Which of the following is not released during decay of living matter?

  回答

  (B)

  Oxygen
• 49

  In commensalism

  回答

  (C)

  one of the organisms gains while the other neither gains nor loses
• 50

  Parasitism can best be defined as an association between two organisms in which

  回答

  (D)

  one organism gains and the other loses
• 51

  Which of the following best describes the adaptation of the earthworm to its habitat?

  回答

  (A)

  Living in burrow during the day to prevent desiccation
• 52

  Trypanosomiasis is associated with

  回答

  (D)

  tsetse fly
• 53

  The major reason why foods should be properly covered is that

  回答

  (A)

  micro-organisms in air would contaminate the food
• 54

  Which of the following is not a means of conserving natural resources?

  回答

  (D)

  Bush burning
• 55

  Which of the following resources is non-renewable?

  回答

  (C)

  Mineral deposits