Bahd7aniuca Bahd7aniuca

08-05-2016
Biology

contestada

Before there was any life on earth, which gas was absent from earth’s ancient atmosphere?

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englishhw englishhw

08-05-2016

Oxygen was absent from the atmosphere it has only been present for the past 2.7-2.8 billion years but the earth is approximately 4.5 billion years old.

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ayhuhka ayhuhka

10-06-2019

Oxygen is your answer.

thanks and hope help

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