NEET Biology question

Assertion: The earliest organisms that appeared on the earth were non-green and presumably anaerobes. Reason: The first autotrophic organisms were the chemoautotrophs that never released oxygen.

(A)Assertion is True, Reason is True; Reason is correct explanation for Assertion
(B)Assertion is True, Reason is True; Reason is not correct explanation for AssertionCorrect
(C)Assertion is True, Reason is False
(D)Assertion is False, Reason is True

Answer: (B)

Solution

The primitive atmosphere was devoid of free oxygen, so only anaerobic, heterotrophic organisms could survive and these were indeed non-green, making the Assertion true; the Reason is also true because the first autotrophs were chemoautotrophs that derived energy

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Question ID VK-121058