Question

Pesticides are considered as hazardous because they

• A. Persist in environment
• B. Do not enter food chain
• C. Affect target organism only
• D. Do not kill natural enemy populations

Answer 1

The correct option is A Persist in environment

Pesticides are non biodegradable as they can't be degraded by the action of microbes. They enter the water bodies on runoff from fields and gets accumulated in the bodies of fishes. In this way they enter the food chain and reach the higher trophic levels They enter the body of humans and cause serious health hazards. Hence, for this reason, pesticides are hazardous as they persist in the environment.

So, the correct answer is 'Persist in environment'.