C4 Photosynthesis

Question

C4 photosynthesis
A) is advantageous because RUBP carboxylase has a high affinity for CO2.
B) is advantageous because PEP carboxylase has a high affinity for CO2.
C) the stomata can remain open during the day.
D) evolved just once.
E) none of the above

Accepted Answer

C4 photosynthesis is advantageous because PEP carboxylase has a high affinity for CO2, allowing plants to efficiently fix carbon even under low CO2 conditions.