Question

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

A) cold and wet
B) cold and dry
C) hot and wet
D) hot and dry

Answer 1

D) hot and dry C4 is not an alternative pathway but an additional one.

Answer 2

D) hot and dry. C4 pathway of carbon fixation is used by plants as an adaptive mechanism to prevent or reduce water loss during hot weather condition. In carbon fixation, C4 is not an alternative pathway but an additional one.