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Asked by Sarah

4.   Ancient cyanobacteria released ______, which assisted in creating the atmosphere as we know it today. 

A. oxygen
B. lead
C. hydrogen
D. ore

A?
10 years ago

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Answered by Reed
yes
10 years ago
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4.   Ancient cyanobacteria released ______, which assisted in creating the atmosphere as we know it today. 

A. oxygen
B. lead
C. hydrogen
D. ore

A?

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