Home Biology Ecosystem Ecological Succession (NIS) Which of the following is NOT a reason why p…
Biology Ecosystem Ecological Succession (NIS) Single Correct MCQ
Published on: August 14, 2026

Which of the following is NOT a reason why productivity declines from one trophic level to the next?

A
Energy is converted into tissue by many trophic levels.
B
Some of the energy stored in the chemical bonds of reduced carbon compounds is lost as heat as it is metabolized.
C
Carnivores never consume many herbivores because they hide effectively or sequester toxins.
D
Much of the net primary productivity is unavailable to herbivores.

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Verified by Experts
The correct answer is:
A

This statement is NOT a reason for productivity decline, since energy conversion into tissue happens at each level but doesn’t explain the loss.

The real reasons are heat loss during metabolism, unconsumed herbivores, and unavailable primary productivity.

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