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NEET UG BIOLOGY MCQ: EVOLUTION

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According to one of the most accepted theory, the earth atmosphere before any life had originated consists of

{\mathrm{H}_2}\mathrm{O},{\mathrm{H}_2},\mathrm{N}{\mathrm{H}_2}

and

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Correct option: A

\mathrm{C}{\mathrm{H}_4}

Option A (

\mathrm{C}{\mathrm{H}_4}

) is correct because methane was a key component of the early Earth's atmosphere.

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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.