A) Na
B) K
C) ABA
D) Auxins
Correct Answer: B
Solution :
It has been now experimentally proved that opening of stomata is an energy consuming process and not closing. The turgidity of guard cells is usually controlled by \[{{K}^{+}},C{{l}^{-}}\] and \[{{H}^{+}}\]. The opening of stomata is initiated by excretion of \[{{H}^{+}}\] by guard cells, intake of \[{{K}^{+}}\] and \[C{{l}^{-}}\]- and closing is controlled by abscisic acid.
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