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(B) $DDT$ (Dichlorodiphenyltrichloroethane) is a persistent organic pollutant that undergoes biomagnification. In birds,high concentrations of $DDT$ i

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Many of the birds' eggs laid did not hatch

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(B) $DDT$ (Dichlorodiphenyltrichloroethane) is a persistent organic pollutant that undergoes biomagnification. In birds,high concentrations of $DDT$ interfere with calcium metabolism. This leads to the thinning of the eggshells. Consequently,these thin-shelled eggs break prematurely during incubation,resulting in a significant decline in the bird population because many of the eggs laid did not hatch.

Column-$I$	Column-$II$
$(1)$ Mercury	$(a)$ Low blood pressure,blindness
$(2)$ Lead	$(b)$ Hyperkeratosis,liver cirrhosis
$(3)$ Arsenic	$(c)$ Bone deformation,testicular atrophy
$(4)$ Cadmium	$(d)$ Abdominal pain,haemolysis
	$(e)$ Anaemia,convulsions

In an area where $DDT$ had been used extensively,the population of birds declined significantly because

Similar Questions

Concentration of $DDT$ in small fishes is..... (in $, ppm$)

Compared to normal water,the $BOD$ of sewage-polluted water is . . . . . . .

Match the columns:

Column-$I$ Column-$II$

$(1)$ Mercury $(a)$ Low blood pressure,blindness

$(2)$ Lead $(b)$ Hyperkeratosis,liver cirrhosis

$(3)$ Arsenic $(c)$ Bone deformation,testicular atrophy

$(4)$ Cadmium $(d)$ Abdominal pain,haemolysis

$(e)$ Anaemia,convulsions

In which of the following aquatic ecosystems is the maximum biomagnification observed?

Differentiate between wet deposition and dry deposition.

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