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WAEC Biology 2025 Question 22

Question 22

Feeding Relationships and Energy Flow

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

  1. A.Energy remains constant across trophic levels
  2. B.Energy decreases from the base to the apex of the pyramid
  3. C.Energy increases from the base to the apex of the pyramid
  4. D.Each trophic level is an independent energy source
Show the answer and explanation

Answer: B (Energy decreases from the base to the apex of the pyramid)

Explanation

Energy is lost as heat at every feeding level, so less energy reaches each higher level and the pyramid narrows upward.