$A$ : During evolution the early time period was without ozone layer.
$R$ : Ozone layer absorbs $U.V.$ rays to some extent.
Assertion and Reason both are correct and also correct explanation.
Assertion and Reason both are correct but not explanation of assertion.
Assertion is correct, but Reason is incorrect.
Both Assertion and Reason are incorrect.
Definitions / Explanation : Hominid features & Evolutionary biology.
After about how many years of formation of earth, life appeared on this planet?
Stanley Miller $(1950)$ was successful in synthesizing
The concept of chemical evolution is based on
Inorganic evolution means