Question

State the main function of guard cells.​

Answer 1

• Stomata are tiny pores present in the epidermis of leaves and young stems that help in gas exchange and transpiration. ​

• The opening and closing of stomata are regulated by the water movement in and out of the guard cells.​

• When water moves into the guard cells, they swell up (turgid) and the stomatal pore opens. ​

• When the water moves out of the guard cells, they shrink (flaccid) and the stomatal pore closes. ​