Question

Which one of the following gets biomagnified at different levels in a food chain?

Options

• Carbon monoxide

• CFC’s

• DDT

• Manure

Answer 1

DDT

Explanation:

Manure is beneficial to the soil because it enriches it by adding essential nutrients. In contrast, substances like carbon monoxide (CO) and chlorofluorocarbons (CFCs) do not contribute nutrients to the soil and therefore do not enter the food chain. DDT (Dichlorodiphenyltrichloroethane) is a pesticide that undergoes biomagnification. It accumulates in the tissues of organisms at each trophic level, and its concentration increases as it moves higher in the food chain.