Question

How do the guard cells regulate opening and closing of stomatal pores ?

Answer 1

The opening and closing of the pore is a function of guard cells.
The guard cell swell when water flow into them, causing the stomatal pore to pay.
similarly the pore closes if the guard cell shrink

Answer 2

1.) The opening and closing of guard cells takes place when there is excess amount of water in them.
2.) That is why guard cells swell up resulting in opening of stomata.
3.) when there is lack of moisture and water in guard cells, they shrivel you and the stomatal opening close up
4.) this is caused to prevent excess water disposal and regulates water supply of plant
5.) is part of the process of transpiration
6.) also takes care of disposal of unwanted nutrients and toxins..
7.) regulates body temperature