According to the theory of evolution, photosynthetic organisms evolved before the presence of what?

The answer choice are : Cellular Membrane , Aerobic Organisms, Organic Molecules, Anaerobic.
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The answer is Aerobic Organisms.  It is thought that the early earth atmosphere did not contain oxygen. Photosynthesis, which results in the release of oxygen would have been necessary before Aerobic organisms could evolve.

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