Why are C4 plants able to photosynthesize with no apparent photo respiration?

Why are C4 plants able to photosynthesize with no apparent photo respiration?



A. They do not participate in the Calvin cycle
B. They use PEP carboxylasr to initially fix CO2
C. They are adapted to cold, wet climates
D. They conserve water more efficiently
E. They exclude oxygen from their tissues









Answer: B


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