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OpenStudy (anonymous):
Anyone Know Science Cause Noody Helping Me In There ... Ill medalll Which of these was the first source of oxygen in our atmosphere Question 6 options: Oxygen produced by living things on land Oxygen released by volcanoes Oxygen released by living cyanobacteria in the ocean which then was released into the atmosphere the original accretion of the Earth
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OpenStudy (dangerousjesse):
What's your first guess?
OpenStudy (anonymous):
Ans. Oxygen released by living cyanobacteria in the ocean which then was released into the atmosphere
OpenStudy (dangerousjesse):
Can you explain the process of that release and what it's called, @rukhsar
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