NEET UG BIOLOGY MCQ: EVOLUTION

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Which of the following statements are correct? I. Bird originated 150 million years ago, II. Mammals originated 200 million years ago,  III. Multicellular organisms 1 billion years ago. The correct combination is

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Correct option: D

I, II and III

Option D (I, II and III) is correct because all three statements about the origin of birds, mammals, and multicellular organisms are accurate.

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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.