What are stomata of a plant? and what purpose do they serve?

Question

please help me

Answer 1

Stomata are the tiny pores on the surface of the leaves.  Number of stomata are more on the dorsal surface than the ventral surface of the leaves. These tiny pores are guarded by guard cells which control the opening and closing of these pores.  The stomata are responsible for gaseous exchange and the release of water vapour during respiration and transpiration respectively. The guard cells are kidney shaped or dumbbell shaped.   In xerophytic plants ( desert plants ) they are sunken ( below the epidermal layer) to avoid a heavy loss of water. The transpired water is reabsorbed by the adjacent cells to conserve the little water they have in the desert conditions.

Answer 2

Stomata are tiny little mouth like openings and they eat or feed on carbon Dioxide, they are usually on the undesides of leaves and can actually get clogged with gink if plant gets mucky. They also serve to help eveaporate mouistute when plants get over watered and I think they release the oxygen form the plant.

Answer 3

Stomata are small pores on the underside of leaves that allow water to leave the plant through transpiration.  They can be opened or closed to control how much water transpires.  The opening and closing of the stomata is controlled by guard cells, which surround the pore.  The whole process of closing and opening the stomata involves the movement of water and potassium ions.... err, but I'm getting too much into this.

Hope that helped.