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Biomagnification of DDT causes decline i...

Biomagnification of DDT causes decline in bird population by:

A

bringing disturbance in calcium metabolism

B

thinning of egg shell

C

Premature breaking of eggs

D

All the above

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The correct Answer is:
D
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Biomagnification of DDT caused decline in bird population by:

How has DDT caused decline in bird population ?

Assertion: Biomagnification of DDT can enhance the decline in bird population. Reason: DDT causes thinning of egg shell and their premature breaking by disturbing calcium metabolism.

A : Biomagnification of DDt can enhance the decline in bird population. R : DDT causes thicking of egg shell and their delayed breaking by disturbing calcium metabolism.

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NTA MOCK TESTS-NTA NEET SET 71-BIOLOGY
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