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Question

With the help of a flow hart, show the phenomenon of biomagnifications of DDT in an aquatic food chain.


Solution

The increased concentration of toxic materials at each trophic level of a food chain is called biomagnification or biological concentration.

When the agricultural fields are sprayed with dichlorodiphenyltrichloroethane (DDT), it is carried into water bodies with low concentration. It gets accumulated by the zooplankton and its concentration goes on increasing at each trophic level in a food chain—from small fish to large fish and birds

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