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NEET UG BIOLOGY MCQ: EVOLUTION
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Understanding
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Primary source of allelic variation is
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Correct option: A
Due to long periods of evolutionary changes
Option B (Due to abrupt mutations) is correct because mutations are the primary source of new alleles, and while long periods of evolutionary change can lead to allele frequency shifts, the initial variation arises from mutation.
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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.
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.