Question

Statement I:Natural aging of a lake by enrichment of nutrients is known as eutrophication. Statement II:Increase of concentration of pollutant at successive trophic levels in aquatic food chain is known as biomagnification.

• A. Both statements I and II are true.
• B. Both statements I and II are false.
• C. Statement I is true. But II is false.
• D. Statement I is false. But II is true.

Hint:

Eutrophication can lead to oxygen depletion in water bodies, while biomagnification affects higher trophic level species more severely.

Answer 1

The Correct Option is A

Step 1: The first statement, "Natural aging of a lake by enrichment of nutrients is known as eutrophication," is correct. Eutrophication is the process where a body of water becomes overly enriched with minerals and nutrients, leading to excessive growth of plants and algae. Step 2: The second statement, "Increase of concentration of pollutant at successive trophic levels in aquatic food chain is known as biomagnification," is also correct. Biomagnification refers to the increasing concentration of toxic substances in organisms at each trophic level of the food chain. Thus, both statements are true.