The principal transpiring organ of a plant is:

If $rc$ and $rs$ respectively represent cuticular and stomatal resistances,the total resistance $(R)$ could be expressed as:

In guard cells,the presence of potassium is essential for

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 the following options.

The cells surrounding the stomatal pore are

Guttation occurs through . . . . . . .