First slide

Transpiration

Question

During active transpiration, choose the processes that occur in a leaf.
A. The water vapor diffuses from the intercellular spaces of mesophyll of leaf into the atmosphere through stomata
B. The oxygen of the leaf is diffused into the atmosphere through stomata.
C. The ${CO}_{2}$ of atmosphere diffuses into the leaf from atmosphere.
D. The ${CO}_{2}$ of leaf diffuses into the atmosphere through stomata.

Easy

A

A, B and D are correct
B

A, B and C are correct
C

B and C only are correct
D

Only D is correct

Solution

During active transpiration in a day there is more diffusion of ${CO}_{2}$ from atmosphere into leaf through stomata. The vapor pressure in a leaf is more than atmosphere and the $O_{2}$ concentration is more in the leaf than in the atmosphere. Hence water vapour and O2 are diffused from leaf to atmosphere and ${CO}_{2}$ from atmosphere into leaf through stomata.

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