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Biology 2020 WAEC Past Questions

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26

Which of the following statements about a mixture of a protein-digesting enzyme and starch solution would be correct? The protein-digesting enzyme

  • A. has no effect on the starch solution
  • B. leads to the production of amino acids
  • C. leads to the production of glucose
  • D. digest the starch
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27

The mutualism type of relationship is different from a parasitic relationship because in mutualism

  • A. both organisms involved benefit
  • B. none of the organisms benefits or harm each other
  • C. both organisms harm each other
  • D. only one of the organisms is harmed
View Answer & Discuss (1) WAEC 2020
28

The table below shows the number of some organisms in habitats W and Y. Study it to answer the question below;

Organism                 Number in the habitat
   habitat W habitat Y
Plankton  126 0
Antelope 0 51
Water flea 10 0
Tilapia 23 0
Lion 0 6
Frog 6 0
Grass 0 250

What type of habitat is W?

 

  • A. Rainforest
  • B. Pond
  • C. Desert
  • D. Ocean
View Answer & Discuss WAEC 2020
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29

The table below shows the number of some organisms in habitats W and Y. Study it to answer the question below;

Organism                 Number in the habitat
   habitat W habitat Y
Plankton  126 0
Antelope 0 51
Water flea 10 0
Tilapia 23 0
Lion 0 6
Frog 6 0
Grass 0 250

 

Which of the following statements about habitat W is correct? The 

  • A. absence of lions and antelopes shows that the habitat is terrestrial
  • B. presence of Tilapia and planktons shows that the habitat is not aquatic
  • C. type of organisms present indicate that habitat is aquatic
  • D. absence of grasses indicates that the habitat is terrestrial
View Answer & Discuss WAEC 2020
30

The table below shows the number of some organisms in habitats W and Y. Study it to answer the question below;

Organism                 Number in the habitat
   habitat W habitat Y
Plankton  126 0
Antelope 0 51
Water flea 10 0
Tilapia 23 0
Lion 0 6
Frog 6 0
Grass 0 250

 

The number of lions and antelops in habitat Y shows that the lion 

  • A. is the prey while the antelope is the predator
  • B. is the predator while the antelope is the prey
  • C. and the antelope are preys to each other
  • D. and the antelopes are predators
View Answer & Discuss (1) WAEC 2020
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