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Microbes in Agriculture

Anaerobes wer...

Question

Anaerobes were the first organisms to appear on the primitive earth because

A

They had no enzyme system for oxygen utilization

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B

Free oxygen could not be assimilated

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C

Free molecular oxygen was absent

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D

They were simple in organization

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Solution

The correct option is C Free molecular oxygen was absent
Anaerobes were the first organisms to appear on the primitive earth because free molecular oxygen was absent.

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