Ancient cyanobacteria released ______, which assisted in creating the atmosphere as we know it today. a. hydrogen b. oxygen c. lead d. ore

asked Nov 13, 2017 218k views

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

a. hydrogen
b. oxygen
c. lead
d. ore

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6 votes

I would probably go with B. Oxygen, I hope that this helps!

Manit answered Nov 14, 2017

by Manit

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6 votes

oxygen is you answer

Blitzcrank answered Nov 17, 2017