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

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

User Alex Berdyshev
by
7.3k points

2 Answers

6 votes
I would probably go with B. Oxygen, I hope that this helps!
User Manit
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6 votes
oxygen is you answer
User Blitzcrank
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