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High concentrations of DDT in fish eating birds causes all the following, except

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premature breaking of eggs

disturbed calcium metabolism

thinning of egg shell

damage to ovaries

answer is D.

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Detailed Solution

Ovaries are not affected by DDT.

High concentrations of DDT disturb calcium metabolism in birds, which causes thinning of eggshell and their premature breaking, eventually causing decline in bird populations.

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