WAEC - Biology (1995)

• 1

  At what level of organisation is Amoeba?

  Відповідь

  (C)

  Cellular
• 2

  Which of these could be regarded as an advantage of complexity in higher organisms?

  Відповідь

  (D)

  Cellular differentiation leads to internal structural specialization
• 3

  Which of the following organisms is one-celled and free-living?

  Відповідь

  (D)

  Chlamydomonas
• 4

  One of the differences between plant and animal cells is that in plants

  Відповідь

  (E)

  carbohydrates are stored as starch, but as glycogen in animals.
• 5

  Carbondioxide enters the stomata during photosynthesis through the process known as

  Відповідь

  (C)

  diffusion
• 6

  Which of the following groups carry out similar functions in living things?

  Відповідь

  (B)

  Sclerenchyma, cartilage and chitin
• 7

  Which of the following statements is correct?

  Відповідь

  (C)

  triceps muscle originated at the scapula and head of the humerus
• 8

  Which of the following pairs of tissues is responsible for strengthening the plant?

  Відповідь

  (C)

  Collenchyma and Sclerenchyma
• 9

  Which of the following is not a tissue found in plants?

  Відповідь

  (D)

  Dermis
• 10

  Higher organisms use a transport system and not diffusion only to distribute nutrients because

  Відповідь

  (A)

  the ratio of their surface area to volume is small
• 11

  In complex food relationships in a community, the primary, secondary and tertiary consumers are referred
  to as

  Відповідь

  (C)

  heterotrophs
• 12

  The cell membrane of a cell is said to be semi-permeable because

  Відповідь

  (D)

  it is actively selective in allowing substances pass through it
• 13

  

  The function of the part labelled I is

  Відповідь

  (B)

  trapping solar energy
• 14

  

  The part labelled ll is the

  Відповідь

  (A)

  stoma
• 15

  

  The structure that will be stained blue-black by iodine is labelled

  Відповідь

  (A)

  I
• 16

  In the anaerobic stage of respiration, the net ATP molecules produced per
  glucose molecule

  Відповідь

  (B)

  two
• 17

  Reabsorption of the metabolic products along the kidney tubules is made possible by the

  Відповідь

  (D)

  presence of network of capillaries around the convoluted tubules
• 18

  Hormones are transported around the mammalian body by

  Відповідь

  (C)

  blood
• 19

  Which of the following is not a function of insulin?

  Відповідь

  (E)

  Stimulates muscles to oxidize glucose.
• 20

  Which of the following is the correct route of transmission of impulses along a reflex arc?

  Відповідь

  (A)

  Receptor → sensory neurone → synapse → intermediate neurone → synapse → motor neurone → effector
• 21

  Which of the following statements is false?

  Відповідь

  (C)

  Taste buds and olfactory cells are active when wet as well as when dry
• 22

  The following are directly involved in transmission of sound waves to the brain except

  Відповідь

  (D)

  eustachian tube
• 23

  The term syncarpous is used to describe a flower when the carpels are

  Відповідь

  (A)

  many and fused
• 24

  Which of the following structures are characteristics of insect pollinated flowers?

  Відповідь

  (C)

  Brightly coloured petals, scent nectar
• 25

  Which of the following statements is not correct?

  Відповідь

  (E)

  Territorial defence encourages food scarcity in a habitat
• 26

  Which of the following is an advantage of dispersal of fruits and seeds? It allows

  Відповідь

  (C)

  even distribution of plants and reduction of intraspecific competition
• 27

  The series of changes that occur in a seed by which the embryo develops into a seedling is known as

  Відповідь

  (D)

  germination
• 28

  Which of the following organisms has a symbiotic relationship with green algae?

  Відповідь

  (C)

  Hydra
• 29

  At the end of photosynthesis, the green leaf is tested for starch and not glucose, because

  Відповідь

  (B)

  the glucose formed is immediately converted to starch
• 30

  Which of these processes removes carbon from the atmosphere?

  Відповідь

  (C)

  Photosynthesis
• 31

  Which of the following conditions is not necessary for photosynthesis to occur in plants?

  Відповідь

  (B)

  There must be xylem tissue used to conduct water
• 32

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

  Відповідь

  (C)

  pH of soil
• 33

  Which of the following is characteristics of a swamp?

  Відповідь

  (C)

  The ground is flooded most of the time
• 34

  Very low annual rainfall, sparse vegetation, high day temperatures and cold nights are the characteristics
  of the biome known as

  Відповідь

  (E)

  desert
• 35

  

  Which of the following conclusions
  cannot be drawn from the graphs?

  Відповідь

  (E)

  The quantity of ions absorbed is inversely proportional to the quantity of carbohydrate (sugar) synthesized.
• 36

  

  The graphs above show the results of experiments which investigated the effect of temperature and oxygen on the rate of uptake of certain ions labelled X and Y by a plant root. Use them to answer the question

  Which of the temperature ranges will likely favour the plant best?

  Відповідь

  (D)

  45 - 50^oC
• 37

  Which of the following is the correct chain for the organism found in an aquatic community?

  Відповідь

  (D)

  Phytoplankton, Paramecium, Waterflea, Prawn, Tilapia, Shark
• 38

  In a food chain the position occupied by an organism is called

  Відповідь

  (A)

  the trophic level
• 39

  Which of these statements about food chain is not correct?

  Відповідь

  (C)

  All organisms in a food chain are animals
• 40

  Which of these is not applicable to the circulation of water- in nature?

  Відповідь

  (A)

  Water removed from oceans are Permanently lost
• 41

  An association between two organisms in which both benefit is called

  Відповідь

  (C)

  symbiosis
• 42

  Which of the following is not an outcome of ecological succession?

  Відповідь

  (A)

  There is a progressive change in species structure, organic matter and energy flow
• 43

  Which of the following is not an effect of over-crowding on a population?

  Відповідь

  (C)

  Commensalism
• 44

  

  The diagram above represent the shape of major group of bacteria
  The groups staphylococci and streptobacilli are represented by

  Відповідь

  (D)

  IV and VII
• 45

  Prevention of erosion could best be carried out by

  Відповідь

  (B)

  contouring of slopping ground and afforestation
• 46

  The following are useful measures for conserving forest except

  Відповідь

  (B)

  encouraging the use of charcoal for industrial and domestic purposes
• 47

  The following practices are aimed at soil conservation except

  Відповідь

  (D)

  bush clearing
• 48

  Which of the following natural resources is most readily available to all organisms?

  Відповідь

  (D)

  Air
• 49

  Which of the following is an example of discontinuous variation?

  Відповідь

  (C)

  Blood group
• 50

  Hereditary variation is best described as

  Відповідь

  (A)

  characters transmitted from generation to generation
• 51

  An individual with blood group AB can receive blood from those in blood group(s)

  Відповідь

  (E)

  A, B, AB and O
• 52

  The statement that the environment determines which organisms survives to reproduce

  Відповідь

  (C)

  supports the idea of survival of the fittest
• 53

  Which of the following is a definition of heredity? It is the

  Відповідь

  (D)

  transfer of characteristics from parents to offspring
• 54

  Which of the following is not a reason why an offspring looks different from its parents?

  Відповідь

  (D)

  Mutation which gives rise to new combination of gene
• 55

  The pair of genes expressed in a heterozygous individual is described as

  Відповідь

  (C)

  dominant gene