Question

Stomata in angiosperms open and close due to

(a) Their genetic constitution

(b) Effect of hormones

(c) Change of turgor pressure in guard cells

(d) Pressure of gases inside the leaves

Answer 1

Correct option (c) Change of turgor pressure in guard cells

Explanation:

The turgor pressure of guard cell increases due to the osmotic diffusion of water from the surrounding epidermal and mesophyll cells. Thus, the guard cells swell and stomata open.