Question

The correct order of biomagnification of DDT in an aquatic food chain is

• A. Water—0.003 ppb, zooplankton—0.04 ppm, small fish—0.5ppm, large fish—2 ppm, fish-eating birds—25 ppm
• B. Water—0.003 ppb, zooplankton—0.5 ppm, small fish—0.4 ppm, large fish—2 ppm, fish-eating birds—25 ppm
• C. Water—0.003 ppb, small fish—0.04, zooplankton—0.5 ppm, large fish—2 ppm, fish-eating birds—25 ppm
• D. Water—0.003 ppm, fish-eating birds—25 ppm, zooplankton—0.5 ppm, small fish—0.04 ppm, large fish—2.5 ppm

Answer 1

The correct option is A Water—0.003 ppb, zooplankton—0.04 ppm, small fish—0.5ppm, large fish—2 ppm, fish-eating birds—25 ppm

Introduction to Biomagnification
The accumulation of toxic substances like DDT in the organisms of successive trophic levels of a food chain is called biomagnification.

Biomagnification in aquatic food chain
Example of Biomagnification in aquatic food chain is:
Water—0.003 ppb→zooplankton—0.04 ppm→small fish—0.5ppm→large fish—2 ppm→fish-eating birds—25 ppm.

Final answer
(B) Water—0.003 ppb, zooplankton—0.04 ppm, small fish—0.5ppm, large fish—2 ppm, fish-eating birds—25 ppm