Biology
Biology, 26.09.2019 20:50, dbenitezmontoya3

Large amounts of oxygen gas appeared in earth's atmosphere about years ago.

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Biology, 28.06.2019 23:00, rokinray
Large amounts of oxygen gas appeared in earth's atmosphere about 2.7 bya years ago, a.after photo-autotrophic prokaryotes evolved b.after eukaryotes evolved c.before anaerobic organisms evolved d.after the first organisms colonized land
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Biology, 12.07.2019 16:30, dessyrob05
Large amounts of oxygen gas first appeared in earth's atmosphere about years ago. 500,000 3.5 million 10 million 2.7 billion 3.5 billion
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Biology, 23.10.2019 00:00, lizdeleon248
The great oxygen event marks the time, approximately 2.5 billion years ago, when there was enough oxygen in the atmosphere to support a major burst of life on earth there was a cataclysmic weather event that absorbed most of the oxygen in the atmosphere and locked it into iron deposits in the oceans there was significant oxygen in the atmosphere there was a massive volcanic eruption that lead to a very rapid increase in oxygen levels on earth photosynthesis was clearly established and producing oxygen.
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Large amounts of oxygen gas appeared in earth's atmosphere about years ago....

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