64.The C⁴ plants are photosynthetically more efficient than C³ plants because: A. They have more chloroplasts B. The CO² compensation point is more C. CO² generated during photorespiration is trapped and recycled through PEP carboxylase D. CO² efflux is not prevented
It have less CO2 compensation points and chlorophyll concentration is more than in C3 plants. Atmospheric CO2 is fixed by PEP carboxylase in mesophyll cells and is accepted by phosphoenolpyruvate (PEP) in the mesophyll cells to produce 4 carbon organic oxaloacetic acid. Thus, option C is correct.
