Ancient cyanobacteria released ______, which assisted in creating the atmosphere as we know it today.
A. ore
B. lead
C. oxygen
D. hydrogen
Ancient cyanobacteria released OXYGEN, which assisted in creating the atmosphere as we know it today.
Expert answered|Score 1|
jobel008|Points 32|
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Asked 7/12/2018 8:09:52 AM
Updated 5/11/2020 12:02:57 AM
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