Observe the diagram and answer the following:
(a) Are these types of guard cells found in monocots or dicots?
(b) Which of these shows a higher water content (i) or (ii)?
(c) Which element plays an important role in the opening and closing of stomata?
(a) Bean-shaped guard cells are located in dicots
(b) In (i) stomata are open and turgid and thus have a higher water level than in (ii) which is mostly closed and quite flaccid
(c) Potassium is the key element