How are stomata adapted to their function?

How are stomata adapted to their function?

It moves by diffusion through small holes in the underside of the leaf called stomata . Guard cells control the size of the stomata so that the leaf does not lose too much water in hot, windy or dry conditions.

How is guard cell structurally adapted for gaseous exchange?

Thin/elastic outer wall; it bulges outwards; Thick/less elastic inner wall; it curves to open the stomata/straightens to close the stomata; Has chloroplasts; for photosynthesis/synthesized sugar (glucose/sucrose/fructose) that is osmotically active.

What are guard cells Specialised to do?

Guard cells are highly specialized cells that form tiny pores called stomata on the leaf surface. The opening and closing of stomata control leaf gas exchange and water transpiration as well as allow plants to quickly respond and adjust to new environmental conditions.

How is Aerenchyma adapted to its function?

The large air-filled cavities provide a low-resistance internal pathway for the exchange of gases between the plant organs above the water and the submerged tissues. This allows plants to grow without incurring the metabolic costs of anaerobic respiration.

Are stomata guard cells?

Guard cells are cells surrounding each stoma. They help to regulate the rate of transpiration by opening and closing the stomata.

How big is a guard cell?

Guard cells are highly consistent in size and shape, averaging 20 µm in length and 9 µm in width.

How is the guard cell adapted to its job?

A guard cell within stomates (pores) have the capability of opening and closing, to minimize water loss from evaporation. Why is a plant cell well adapted to its job?

How are palisade cells adapted to their function?

The guard cells are adapted in the following ways. Structurally they have thickened inner walls surrounding the pore they form. As they become turgid with water the outer walls allow some stretching whilst the thick inner walls do not.

When do guard cells become flaccid or turgid?

The guard cells become turgid when the water concentration is high within the cell than the surrounding. Conversely, the low concentration of water within the cell than the surrounding makes the guard cells flaccid .

What makes the guard cell thick or thin?

The cell of guard cells is thick towards the opening of the stomatal aperture. Conversely, the outer convex wall of the guard cells is thin. The chemical composition of the cuticle decides the types of molecules that can enter a leaf stoma.