Question

What are guard cells? Write two examples.​

Answer 1

Answer:

Guard cells are located in the leaf epidermis and pairs of guard cells surround and form stomatal pores, which regulate CO2 influx from the atmosphere into the leaves for photosynthetic carbon fixation. Stomatal guard cells also regulate water loss of plants via transpiration to the atmosphere.

Answer 2

Answer:

Guard cell are the kidney shaped cell that surround the stomata and are responsible for opening and closing of stomatal pore. When potassium ions accumulate in the guard cells, they absorb water and become swollen and turgid. Due to their turgidity the stomatal pores open up completely and transpiration oocurs.