Transport in Plants Question 5
5. Water vapour comes out from the plant leaf through the stomatal opening. Through the same stomatal opening carbon dioxide diffuses into the plant during photosynthesis. Reason out the above statements using one of following options
[2016]
(a) Both processes cannot happen simultaneously.
(b) Both processes can happen together because the diffusion coefficient of water and $CO_2$ is different.
(c) The above processes happen only during night time.
(d) One process occurs during day time, and the other at night.
Show Answer
Answer : b
Hints & Solutions
(b) In actively growing plants, water is continuously evaporating from the surface of leaf cells through stomatal opening exposed to air. This is called transpiration. Through the same stomatal opening carbon dioxide diffuses into the plant during photosynthesis simultaneously as both are the process of simple diffusion occurs in order of diffusion pressure gradient or diffusion coefficient.
