Question

The range of biomagnification of DDT in an aquatic food chain, if starting from 0.003 ppb level in water may go at fish-eating bird level upto:

• A. 0.3 ppm
• B. 3.0 ppm
• C. 30.0 ppm
• D. 0.003 ppm

Answer 1

The correct option is B 3.0 ppm

The pesticides and nondegradable. They have much affinity for fats. Hence, they tend to move into living organisms. They get concentrated as they move up the food chains. For example at each trophic level, the accumulation of insecticide is increased by 10 times. For example, if the goat gets one part per million of DDT from the grass is it will have 10 parts per million in its tissues. The man eating the good will have 100 PPM. The man-eating tiger will have thousand PPM. If the food chain is still greater the accumulation will still be higher. Is increasing accumulation of insecticide and the higher organism is called biomagnification which is biological amplification.

So, the correct option is '3ppm'