Multiple Choice
Recall that C4 plants tend to have higher rates of photosynthesis when compared with C3 plants (under normal 21% O2 atmospheric conditions) . If photosynthetic rates are higher, why aren't all plants C4 plants?
A) Because of the need to regenerate PEP, C4 photosynthesis consumes more energy than C3 photosynthesis.
B) Because of rubisco, C4 photosynthesis consumes more O2 than C3 photosynthesis.
C) Because of mesophyll cells, C4 photosynthesis requires more chlorophyll than C3 photosynthesis.
D) Because of leaf veins, C4 photosynthesis requires more H2O than C3 photosynthesis.
Correct Answer:

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Correct Answer:
Verified
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