WAEC Biology 2015 Objective — Question 31

Question 31 of 50 from the West African Examinations Council (WAEC) Biology 2015 Objective paper, with the correct answer and a full explanation.

An organism at the start of a food chain which provides the total input of energy into an ecosystem is the

A. sun
B. producerCorrect
C. consumer
D. decomposer

Explanation

The organism at the start of a food chain is the producer (green plant), which captures energy (originally from the sun) and introduces it into the ecosystem.

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