9
QuizMultiple Choice

Humans and the Energy Cycle

Question 9 • SC332 Environmental Science B

Which of the following is true concerning energy flow through an ecosystem’s food chain?

Answer
A
Primary consumers collect their energy from the sun.
B
The sun is the final receiver of energy in an ecosystem.
C
Energy is lost at each successive energy level in the chain.
D
Tertiary consumers account for the largest store of energy.

Explanation

Energy is lost at each successive trophic level, often as heat and through life processes, so less energy is available to organisms higher in the food chain. Producers capture energy from sunlight; primary consumers get energy by eating producers. Therefore, “Energy is lost at each successive energy level in the chain” is true.

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