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Solution


Q.

Fish diet can play significant role in biological magnification of pesticides like DDT because:
1 harmful chemicals get washed into water bodies and enter the aquatic food chains.  
2 fishes can also produce these chemicals in their bodies.  
3 fishes increase in number rapidly.  
4 fishes have special enzymes in their body to digest these pesticides.  

Ans.

(1)

Biological magnification occurs when the harmful chemicals used in the crop fields get washed into water bodies and enter the food chains.