Question

what is the work of guard cell explain me

Answer 1

the work of guard cell is to guard the stomata.the guard cell swell when water flows into them causing the stomatal poreto open similarly the pore closes if the guard cells shrink

Answer 2

Here is you answer
1.regulate the rate of transpiration.
2.protect the stomatal pore
3.controls opening and closing of stomata
4.a allows gas exchange
_______________________
Hope it helps
with regards SMITA