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How should the change from early atmosphere to present oxygen-rich atmosphere be understood?

Answer and explanation

Correct answer: It was a gradual result of geochemical and later biological processes

The early atmosphere had little free oxygen and later biological processes increased it. In exams, treat atmospheric development as gradual.

Related tags

OriginEvolutionAtmosphereEarly And Modern TheoriesThe Origin And Evolution Of The EarthGeographyClass 11 Mcq

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