A : During evolution early time period was without ozone layer. R : Ozone layer absorbs U.V. rays to

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6.Evolution

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$A$ : During evolution the early time period was without ozone layer.
$R$ : Ozone layer absorbs $U.V.$ rays to some extent.

A

Assertion and Reason both are correct and also correct explanation.

B

Assertion and Reason both are correct but not explanation of assertion.

C

Assertion is correct, but Reason is incorrect.

D

Both Assertion and Reason are incorrect.

Solution

Early time was without ozone. $UV$ rays entered atmosphere.

Standard 12

Biology

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