EvolutionHard

Question

Which was asent in the atmosphere at the time of origin of life ?

Options

A.NH3
B.H2
C.O2
D.CH4

Solution

The atmosphere of earth at the time of origin of life was without free oxygen atoms. The primitive atmosphere chiefly consisthg of methane, ammonia, water vapour, hydrogen gas, and some carbon monoxide.Hydrogen atoms were most numerous and most reactive in primitive atmosphere. They combined with all available oxygen atoms and formed water.

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