NEET UG BIOLOGY MCQ: EVOLUTION

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There are two opposing views about origin of Modern man. According to one view, Homo eretus in Asia were the ancestors of modern man. A study of variations of DNA however suggested African origin of modern man. What kind of observation on DNA variation could suggest this?

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Correct option: C

Greater variation in Asia than in Africa

Option A (Greater variation in African than in Asia) is correct because greater genetic variation in a population suggests it is the origin from which other populations migrated.

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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.