• # question_answer Water vapour comes out from the plant leaf through the stomatal opening. Through the same stomatalopening carbon dioxide diffuses into the plant during photosynthesis. Reason out the above statements using oneof following options: A)  Both processes cannot happen simultaneouslyB)  Both processes can happen together because the diffusion coefficient of water and $C{{O}_{2}}$ is differentC)  The above processes happen only during night timeD)  One process occurs during day time, and the other at night

Water vapour comes out and $C{{O}_{2}}$ diffuses simultaneously through stomatal opening because diffusion coefficient of water and $C{{O}_{2}}$ is different and it moves along its concentration gradient.