Question

In which type of environment are plants most likely to use a C4 pathway of carbon fixation?

cold and wet
cold and dry
hot and wet
hot and dry

Answer 1

I would try the third one

Answer 2

Without a doubt, hot and dry conditions is when a plant will use a C4 pathway. Photo respiration is when Rubisco binds to oxygen to release carbon dioxide. The will stomata close under hotter conditions, altering the carbon concentration in the leaves of a warm season grass (C4) plant.