If a pond food chain gets polluted by DDT, the tissue conce…

Physics NEET Full Syllabus Mock Test 180 Question New Syllabus Mock Test - 2 PCB MCQ (Single Correct)

If a pond food chain gets polluted by DDT, the tissue concentration of DDT would be the highest in:

Aquatic weed

Herbivorous fish

Carnivorous fish

None of these

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If a pond gets polluted, then out of the given options, concentration of DDT would be the highest in a carnivorous fish. This is because, concentration of toxicants increase at successive trophic levels as these get accumulated when organisms cannot metabolise or excrete them. Since, out of the given options, a carnivorous fish occupies the highest trophic level in an aquatic food chain, concentration of DDT would be the highest in big fishes.

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