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  • Can someone explain In an area where DDT had been used extensively, the population of birds declined significantly because:

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

  • Option 1)

    birds stopped laying eggs

  • Option 2)

    earthy worms in the area got eradicated

  • Option 3)

    cobras were feeding exclusively on birds

  • Option 4)

    many of the birds laid, did not hatch

 

Answers (1)

best_answer

 

Biomagnification -

Biomagnification refers to increase in concentration of the toxicant at successive trophic levels. This happens because a toxic substance accumulated by an organism cannot be metabolised or excreted, and is thus passed on to the next higher trophic level.

- wherein

This phenomenon is wellknown for mercury and DDT.

 

  


Option 1)

birds stopped laying eggs

this is the incorrect option

Option 2)

earthy worms in the area got eradicated

this is the incorrect option

Option 3)

cobras were feeding exclusively on birds

this is the incorrect option

Option 4)

many of the birds laid, did not hatch

this is the correct option

Posted by

Plabita

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