NEET UG BIOLOGY MCQ: EVOLUTION

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Assertion (A): The first living organisms were heterotrophs.

Reason (R): Hot Dilute soup was formed in the ocean.

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Correct option: B

If both (A) and (R) are true but (R) is not the correct explanation of (A)

Option B (If both (A) and (R) are true but (R) is not the correct explanation of (A)) is correct because while both the assertion about heterotrophs and the reason about the hot dilute soup are true, the hot dilute soup doesn't directly explain why the first organisms were heterotrophs.

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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.