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Ayushree
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Asked: 2025-09-26T11:32:01+00:00 In:

Q.9. Assertion (A): The maximum concentration of chemicals and pesticides occurs at the first trophic level. Reason (R): The chemical and pesticides are not biodegradable.

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Poll Results

0%A. Both A and R are true, and R is the correct explanation of A.
0%B. Both A and R are true, and R is not the correct explanation of A.
0%C. A is true but R is false.
100%D. A is false but R is true. ( 1 voter )
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The correct answer is [C] A is true but R is false.
The maximum concentration of chemicals and pesticides occurs at the highest trophic level, not the first. These chemicals are non-biodegradable, so they accumulate through the food chain, causing biomagnification.

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    1 Answer

    1. ANSWER: [D]

      Explanation: The correct answer is D. A is false but R is true.

      Assertion (A) is false → Maximum concentration of pesticides is found at the highest trophic level (top consumers), not the first level.

      Reason (R) is true → Pesticides are non-biodegradable and accumulate in organisms, causing biomagnification.

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