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Question

According to Oparin, which one of the following was not present in the primitive atmosphere of the earth :


A

Oxygen

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B

Hydrogen

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C

Water vapour

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D

Methane

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Solution

The correct option is A

Oxygen



According to Oparin, life evolved in the oceans during a period when the atmosphere was reducing - in the sense that, it was containing H2, H2O, NH3, CH4, and CO2, but no free O2.


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