WAEC Biology 2018 Objective — Question 32

Question 32 of 50 from the West African Examinations Council (WAEC) Biology 2018 Objective paper, with the correct answer and a full explanation.

In an ecosystem, the least efficient energy transfer link is from the

A. secondary consumers to decomposersCorrect
B. sun to producers
C. primary consumers to secondary consumers
D. producer to primary consumers

Explanation

Energy transfer efficiency generally decreases at higher trophic levels; the link from secondary consumers to decomposers is the least efficient stage.

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