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Biology 2020 WAEC Past Questions

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46

The diagram below is an illustration of a cross between plants A and B of the same species. Study it and answer the question below;

 

 

2020 Biology WAEC Objective Past Questions | Kofa Study

 

If the F1 generation are plants with high yield and resistance, the genotype of the F1 generation plants would be 

  • A. YYRR
  • B. YyRr
  • C. yyRr
  • D. yyrr
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47

The diagram below is an illustration of a cross between plants A and B of the same species. Study it to answer the question below;

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The process that gave rise to the F1 generation is 

  • A. self fertilization
  • B. cross fertilization
  • C. out-breeding
  • D. test cross
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48

Replication of DNA molecules is catalysed by an enzyme called 

  • A. polymerase
  • B. ptyalin
  • C. pepsin
  • D. amylase
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49

Who proposed the theory of evolution by natural selection 

  • A. Darwin
  • B. Lamark
  • C. Aristotle
  • D. Linnaeus
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50

Which of the following statements best explains the reason why termites swarm at night?

  • A. Light is not necessary for swarming
  • B. They avoid day-flying birds
  • C. Light destroys their wings
  • D. They can only see in the dark
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