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

Acold and wet
Bcold and dry
Chot and wet
Dhot and dry

Verified Answer :

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.

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