Question

Q6. How do guard cells regulate the opening and closing of the stomata?

Answer 1

the guard cells are present in the leaves . this cells control the opening and closing of stomata present when water comes at the top of the leaves that guard cells open and the water released

Answer 2

The opening and closing of the pore is a function of the guard cells. The guard cells swell when water flows into them, causing the stomatal pore to open. Simillarly the pore closes if the guard cells shrink