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(D) $DDT$ (Dichlorodiphenyltrichloroethane) is a persistent organic pollutant that undergoes biomagnification in the food chain.In birds,high concentr

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Most of the birds lay eggs,but they do not hatch.

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(D) $DDT$ (Dichlorodiphenyltrichloroethane) is a persistent organic pollutant that undergoes biomagnification in the food chain.In birds,high concentrations of $DDT$ interfere with calcium metabolism.This interference leads to the thinning of eggshells.Consequently,the eggshells break prematurely during incubation,preventing the eggs from hatching and leading to a significant decline in the bird population.

In areas where $DDT$ is used extensively,the bird population declines significantly because...

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