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Biology 8 Online
OpenStudy (sleepyjess):

Which of the following processes is assumed to have produced the oxygen present in the atmosphere? a. formation of microspheres b. photosynthesis c. evolution of RNA and DNA d. sexual reproduction

OpenStudy (destinymasha):

if i had to say anything, it would be b PHOTOSYNTHESIS because photosynthetic activity are responsible for the majority of the oxygen.

OpenStudy (anonymous):

help me

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