A) Proterozoic
History, 26.03.2020 04:20 chrisimichaels7497
During which eon did oxygen begin to build up the most in Earth’s atmosphere?
A) Proterozoic
B) Archean
C) Hadean
D) Phanerozoic
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During which eon did oxygen begin to build up the most in Earth’s atmosphere?
A) Proterozoic
A) Proterozoic
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