Question

how do guard cells regulate opening and closing ​

Answer 1

When water flows on the stomata, the guard cells gets swollen, thus, causing the stomatal pore to open up.

When the water gets dried or used up, the guard cells shrink causing the closure of stomatal pore.

Answer 2

Answer:

Stomatal pores in plants regulate the amount of water and solutes within them by opening and closing theirguard cells using osmotic pressure. In order for plants to produce energy and maintain cellular function, their cellsundergo the highly intricate process of photosynthesis. Critical in this process is the stoma.