WAEC Biology 2025 Objective — Question 32
Question 32 of 50 from the West African Examinations Council (WAEC) Biology 2025 Objective paper, with the correct answer and a full explanation.
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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 pyramidCorrect
- C. Energy increases from the base to the apex
- D. Each trophic level is an independent energy source
Explanation
The pyramid of energy represents the flow of energy through an ecosystem. At each trophic level, energy is lost primarily as heat due to metabolism and other biological processes, so energy decreases from the base to the apex.
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