NEET Biology question

First autotrophs on the primitive earth was/were

(A)Aerobic
(B)anaerobicCorrect
(C)Both (a) and (b)
(D)Photosynthetic protist

Answer: (B)

Solution

Autotrophs are of two types (i) Chemoautotrophs The organisms performing chemosynthesis are called chemoautotrophs. They were anaerobic. Chemoautotrophs has the ability to synthesis organic molecules from inorganic raw materials. Such mode of nutrition is present even now in some bacteria, *e*.*g*., sulphur bacteria,

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Question ID VK-121296