RodBrieger520 RodBrieger520

03-04-2014
Biology

Answered

During the evolution of life on Earth, the photosynthetic organisms initially responsible for raising atmospheric oxygen concentrations from less than 1 percent to about 20 percent were

Acyanobacteria
Barchaea
Cdiatoms
Dflowering plants
Emosses

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chaospaulo chaospaulo

03-04-2014

B or A the chapter I learned talked about both

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