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Dioxygen present in the atmosphere is be...

Dioxygen present in the atmosphere is believed to be produced by

A

photosynthesis

B

irradiation

C

thermolysis

D

electroysis

Text Solution

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The correct Answer is:
1
it was the process of photosynthesis that started to convert the `CO_(2)` components of Earth's early atmosphere to dioxyen `(O_(2))` about `2.5xx10^(9)` years ago, its present oxygen-rich state was attained about `5xx10^(8)` years ago.
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