Life cannot originate from inorganic materials at present b…

Biology Evolution Skill Builder Single Correct MCQ

Published by: CGP EDU Academic Team

Published on: August 21, 2026

Life cannot originate from inorganic materials at present because:

High degree of environmental pollution

High amount of oxygen in the atmosphere

Very high atmospheric temperature

Absence of raw material

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The correct answer is:

The primitive atmosphere was of a reducing nature. It was transformed into an oxidizing atmosphere due to the emergence of cyanobacteria (oxygenic photoautotrophs). They used water to get hydrogen and released oxygen into the atmosphere.

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