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Assertion: Genetic drift refers to chang...

Assertion: Genetic drift refers to changes in the allele frequency occuring by chance.
Reason: Sampling errors often lead to the elimination of certain alleles and fixation of others, reducing genetic variability.

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  4. In 1953 S.L. Miller created primitive earth conditions in the labortor...

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  7. Assertion: Primitive atmosphere was of reducing type. Reason: First ...

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  16. Assertion: Founder effect may lead to formation of new species. Reas...

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  18. Assertion: Disruptive selection changes the population towareds one pa...

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