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OpenStudy (anonymous):

WILL GIVE MEDAL Scientists think that early organisms pumped oxygen into the atmosphere as a result of what process? reproduction photosynthesis respiration growth

OpenStudy (anonymous):

photosynthesis

OpenStudy (anonymous):

I'm going to say respiration, but if I'm wrong, please don't get mad at me.

OpenStudy (anonymous):

It's photosynthesis because early organisms were cyanobacteria, blue-green algae.

OpenStudy (anonymous):

Yeah your right. Sorry. :-)

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