NEET UG BIOLOGY MCQ: EVOLUTION

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Which of the following statements are correct? I. Survival of the fittest is based upon the characteristics that are inherited,  II. Darwin’s variations are small and directional,  III. The fitness is the end result of the ability of adaptation,  IV. Genetic drift is operated in small population,  V. Genetic drift operates in large population,  VI. Genetic drift upset the Hardy-Weinberg equilibrium.  Choose the correct option

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Correct option: D

I, II, III, IV and VI

Option D is correct because all the listed statements except V are correct regarding survival of the fittest, Darwin's variations, adaptation, genetic drift, and Hardy-Weinberg equilibrium.

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The main point of Darwin’s theory is Which one of the following is not a vestigial structure in Homo sapiens? The brain capacities of Homo habilis were Assertion (A): In mammals the forelimbs perform different functions.

Reason (R): The forelimbs in different mammals consist of different sets of bones. Identify the phenomenon in which the members of a species do not interbreed with the members of other species or same species Assertion: Organic compounds first evolved in earth required for origin of life were protein and nucleic acid.
Reason: All life forms were in water environment only.