Question

Assertion (A): The energy which passes to the herbivores does not come back to autotrophs.

Reason (R): The flow of energy in a food chain is unidirectional.

Options

• Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of (A).

• Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of (A).

• Assertion (A) is true, but Reason (R) is false.

• Assertion (A) is false, but Reason (R) is true.

Answer 1

Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of (A).

Explanation:

The energy flow is unidirectional. The energy that autotrophs absorb from the Sun does not return, and the energy that goes to herbivores does not go back to the autotrophs. It is no longer accessible to the previous level as it progresses through the various trophic levels.