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Ancient cyanobacteria released ______, which assisted in creating the atmosphere as we know it today. A. oxygen B. ore C. hydrogen D. lead
Ancient cyanobacteria released OXYGEN, which assisted in creating the atmosphere as we know it today.
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Asked 6/20/2014 9:13:16 AM
Updated 6/20/2014 9:32:37 AM
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Ancient cyanobacteria released OXYGEN, which assisted in creating the atmosphere as we know it today.
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Added 6/20/2014 9:32:37 AM
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