NEET UG BIOLOGY MCQ: EVOLUTION

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Assertion: The first cells used RNA as their
hereditary molecule.

Reason: DNA evolved from RNA.

View answer and explanation

Correct option: B

If both Assertion and Reason are true but Reason
is not the correct explanation of Assertion

Option B (If both Assertion and Reason are true but Reason is not the correct explanation of Assertion) is correct because while it's believed that the first cells used RNA and DNA evolved from RNA, the latter isn't the direct reason for the former.

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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.