Question

Assertion (A): Highest percentage of pesticides is found in tertiary consumers in a food chain. 

Reason (R): Chemicals/pesticides get accumulated progressively at each trophic level.

Options

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

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

Explanation:

Pesticide concentrations increase at higher trophic levels due to biomagnification, so tertiary consumers have the highest concentrations.
This happens because chemicals accumulate progressively at each trophic level, making the reasoning correct and its explanation valid.