NEET UG BIOLOGY MCQ: EVOLUTION

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Read the following statements and find out correct statements:

A) More individuals acquire peripheral character value at both ends of distribution curve - Directional selection.

B) Change in gene frequency occurs by chance - Genetic drift.

C) More individuals acquire mean character value - Stabilizing selection.

D) Sudden disappearance of dinosaurs from the earth - 200 mya.

View answer and explanation

Correct option: C

B and C

Option B is correct because genetic drift is defined as a change in gene frequency by chance, and the sudden disappearance of dinosaurs occurred approximately 66 million years ago (mya), not 200 mya.

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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.