(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 ofstomata?
Answer:
(a) The guard
cells are bean-shaped which are found in dicot plants.
(b) The guards cells
in figure (i) are turgid as, they pull the inner wall of the cell outside
thus,they have more water, (ii) cells are flacid, this condition results when
cells lose water andclose stomatal pore.
(c) The 
ions when move
from neighbouring cells to guards cells, lowering their water potential as a
result the water moves inside making them turgid and thus opening stomata.
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