Multiple Choice
Over evolutionary time, photosynthesis has, in effect, introduced challenges to itself by producing an oxygen atmosphere because:
A) rubisco is an oxygenase.
B) rubisco is a carboxylase.
C) O2 is a strong oxidant.
D) rubisco is an oxygenase and O2 is a strong oxidant.
E) rubisco is an oxygenase and O2 is a strong reductant.
Correct Answer:

Verified
Correct Answer:
Verified
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