Question

Biomagnification of DDT in aquatic food chain from (0.003ppb) in water to fish eating birds would be

• A. (25ppm)
• B. (2ppm)
• C. (5ppm)
• D. (10ppm)

Answer 1

The correct option is A (25ppm)

Biomagnification

Biomagnification refers to the phenomenon of increase in the accumulation of toxic substances within organisms at each successive level of the food chain.

The concentration of DDT present in the food chain is as follows-

Water (0.003 ppb)→zooplankton (0.04 ppm)→small fish(0.5 ppm)→large fish(2 ppm)→fish-eating birds(25 ppm)

Therefore fish-eating birds contain 25ppm of DDT.

Final answer

(C) 25 ppm