Question

Why are stomata and guard cells called turgor operated valves?

Answer 1

stomata and guard cells called turgor operated valves because gases exchange takes place witin the cells and maintains a turgor pressure between cells ,responsible for cellular reaspiration these get operated as valves to maintain turgor pressure

Answer 2

stomata and guard cells are called turgor operated valves because Each stomataconsists of a minute pore called stomasurrounded by two guard cells. Thestoma acts as a turgor operated valvewhich closes and opens according to the turgidity of guard cells. The guard cells are the only epidermal cells that contain chloroplasts.