Question

Q. Guard cells are specially designed. How is this feature related to regulate the size of the cells?

Answer 1

Answer:

Two guard cells surround each stomatal pore, and changes in turgor pressure of the guard cells regulate the size of the pore aperture. An increase in guard cell turgor results in stomatal opening, whereas a reduction in turgor leads to stomatal closure (Willmer and Fricker 1996).

Answer 2

Answer:

Guard cells are cells surrounding each stoma(is a pore, found especially in the epidermis of leaves). They help to regulate the rate of transpiration by opening and closing the stomata.

The guard cells will swell (become turgid) when water flows into them, causing the stomatal pore to open. Similarly, when guard cells shrink or become flaccid due to loss of water from them  the stomatal pore closes. Hence, the shape of guard cells change due to change in the amount of water in them.

So, the correct answer is 'Amount of water in cells'.

Explanation: