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Biology 2025 WAEC Past Questions

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31

When Tilapias' population in a pond reaches the carrying capacity, the population

  • A. alternatively increases and decreases
  • B. remains unchanged
  • C. increases only
  • D. decreases only
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32

Which of the following statements about the pyramid of energy is correct?

  • A. Energy remains constant across trophic levels
  • B. Energy decreases from the base to the apex of the pyramid
  • C. Energy increases from the base to the apex of the pyramid
  • D. each trophic level is an independent energy source
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33

Which of the following sequences represents the trend in eutrophication?

  • A. Heavy mineralization→ lack of oxygen→ massive algal growth
  • B. Excessive nitrates→ massive algal growth →lack of oxygen→death of aquatic organisms
  • C. Excessive phosphates→lack of oxygen→massive algal growth→ death of aquatic organisms
  • D. massive algal growth→excessive nitrates→lack of oxygen
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34

Which of the following statements correctly describes the term population? The number of 

  • A. Tilapia in a lake
  • B. fungus and snail on leaf litter
  • C. bees and butterflies on a flower
  • D. flatworms and roundworms in the gut of an animal.
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35

What is the population density of Ageratum sp. of frequency 1,850 on a land area measuring 100m\(^2\)?

  • A. 18.50/m\(^2\)
  • B. 18.05/m\(^2\)
  • C. 0.50/m\(^2\)
  • D. 0.05/m\(^2\)
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