WAEC - Biology (2015)

• 1

  Which of the following organisms is not a protozoan?

  回答

  (B)

  Ascaris
• 2

  The structure of the cell membrane is a

  回答

  (C)

  middle bi-layer of lipid with a protein layer on either surface
• 3

  Which of the following cells is a specialized cell?

  回答

  (C)

  Guard cell
• 4

  When a Spirogyra filament is placed in a concentrated salt solution for 30 minutes, the cell would become

  回答

  (A)

  plasmolysed
• 5

  Water and salts are both lost from the human body in

  回答

  (D)

  sweat and urine
• 6

  Which of the following features could be used to determine the growth of a seedling?

  回答

  (D)

  Length of radicle
• 7

  A plant that commonly undergoes vegetative propagation by means of leaves is

  回答

  (B)

  Bryophylum
• 8

  Blood pressure is higher in the arteries as a result of

  回答

  (B)

  contraction and relaxation
• 9

  A farmer who wants to keep seeds for three years before planting and wants to prevent them from sprouting uses

  回答

  (C)

  abscisin
• 10

  A person had an accident that affected the skull but not the nose and later lost the sense of smell. The accident must have a affected the

  回答

  (B)

  olfactory lobes of the brain
• 11

  Ability of the human eye to focus images accurately on the retina is called

  回答

  (D)

  accommodation
• 12

  Which of the following processes removes carbon (IV) oxide from the atmosphere?

  回答

  (C)

  Photosynthesis
• 13

  Which of the following characteristic features is not associated with monocotyledonous plants?

  回答

  (A)

  Well differentiated sepals and petals
• 14

  The main difference between a seed and a fruit is that a fruit

  回答

  (B)

  has two scars while a seed is has one
• 15

  A student used the following steps in testing for a non-reducing sugar.
  
  I. added Benedict's solution to the sugar solution
  
  ll. added dilute hydrochloric acid to the sugar and boiled it;
  
  lll. added sodium hydroxide solution to the solution in ll. and boiled;
  
  IV. added Benedict's solution to the cooled solution in lll.
  
  Use this information above to answer the question.
  
  Why did the student add the dilute hydrochloric acid to the sugar solution in step ll? To

  回答

  (B)

  hydrolyse the sugar solution
• 16

  A student used the following steps in testing for a non-reducing sugar.
  
  I. added Benedict's solution to the sugar solution
  
  ll. added dilute hydrochloric acid to the sugar and boiled it;
  
  lll. added sodium hydroxide solution to the solution in ll. and boiled;
  
  IV. added Benedict's solution to the cooled solution in lll.
  
  Use this information above to answer the question.
  
  What is the importance of step ll in the testing process? To

  回答

  (D)

  increase the acid content of the sugar solution
• 17

  A student used the following step in testing for a non-reducing sugar.
  I. added Benedict's solution to the sugar solution
  II. added dilute hydrochloric acid to the sugar solution and boiled it
  III. added sodium hydroxide solution to the solution in II and boiled;
  IV. added Benedict's solution to the cooled solution in III.

  The colour change to be observed in step IV is

  回答

  (B)

  brick-red
• 18

  Which of the following organs of the alimentary canal is not correctly matched with its function?

  回答

  (C)

  Appendix - releases enzymes
• 19

  A person suffering from obstruction of the bile duct is advised not to eat fats and oil because

  回答

  (C)

  bile emulsifies fat and oil
• 20

  A community reaches a climax when

  回答

  (D)

  the composition and size of a community remains constant over a long period
• 21

  Which of the following components make up an ecosystem?

  回答

  (B)

  Living and non-living factors
• 22

  

  

  Study the diagram above and answer the question
  
  The structure labelled I is

  回答

  (A)

  a pitcher
• 23

  Which of the following organisms is an endo-parasite?

  回答

  (A)

  Tapeworm
• 24

  Which of the following organisms is an endo-parasite?

  回答

  (A)

  Tapeworm
• 25

  Oil applied to the surface of water kills the larvae of mosquitoes through

  回答

  (D)

  Suffocation
• 26

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

  回答

  (C)

  Air
• 27

  Which of the following resources is non-renewable?

  回答

  (B)

  Mineral deposit
• 28

  Soil erosion could be prevented by

  回答

  (B)

  cover-cropping
• 29

  Which of the following statements about human blood groups is not true?

  回答

  (A)

  A is dominant over B
• 30

  Which of the following traits is not inheritable? Ability to

  回答

  (D)

  rool the eyeball
• 31

  A woman with blood group A gives birth to a child with blood group O. Which of the following blood groups cannot belong to the father?

  回答

  (C)

  C
• 32

  How many chromosomes will be in a gamete if the normal cell has four chromosomes?

  回答

  (A)

  2
• 33

  

  Use the diagram above to answer this question.
  
  What of the following statements about the cross is correct?

  回答

  (C)

  The gene for the spotted coat is dominant over the gene for the black coat
• 34

  

  Use the diagram above to answer this question.
  
  What are the genotypes of the parents if the gene for skin colour is H?

  回答

  (A)

  Spotted Leopard HH Black Panther hh
• 35

  

  Use the diagram above to answer this question.
  
  What are the genotypes of the parents if the gene for skin colour is H?

  回答

  (A)

  Spotted Leopard HH Black Panther hh
• 36

  According to Mendel's first law of inheritance, segregation of genes occur when

  回答

  (C)

  tall plants and short plants are crossbred
• 37

  Which of the following statements about sex-linked characters is not true?

  回答

  (C)

  Males are usually carriers
• 38

  

  In explaining the term camouflage, to a class, the diagram above show four varieties, P, Q, R, and S of the same species of fish living amongst water plants in a river were used
  
  Which of the varieties is likely to decrease most in number if a predatory fish is introduced into the river?

  回答

  (C)

  R
• 39

  

  In explaining the term camouflage, to a class, the diagram above show four varieties, P, Q, R, and S of the same species of fish living amongst water plants in a river were used
  
  Which of the varieties is most likely to outlive the others?

  回答

  (B)

  Q
• 40

  

  The variety P,Q,R and S Outlive the others because the

  回答

  (C)

  markings of the variety are similar to those of the environment
• 41

  

  The diagram above illustrates a part of the mammalian skeleton . use it to answer this this question
  
  The part of the skeleton illustrated in the diagram is the

  回答

  (C)

  cervical vertebrae
• 42

  

  The diagram above illustrates a part of the mammalian skeleton . use it to answer this this question
  
  The function of the part lebelled I is to

  回答

  (C)

  carry the spinal cord
• 43

  

  The following diagram above show the sequence of events in early cell division. Study the diagram and answer the question.
  
  In which of the following cells is this divisin likely to take plce?

  回答

  (C)

  Muscle cell
• 44

  

  The diagram above is illustration of a crocodile. Use it to answer this question.
  
  Which of the labelled parts enable the animal to stay under water most of the time?

  回答

  (B)

  I, II and V
• 45

  

  The diagram above is illustration of a crocodile. Use it to answer this question.
  
  Two characteristic features of the class to which the crocodile belongs are labelled

  回答

  (B)

  III and IV