NEET 2002 Biology question

Opening and closing of stomata is due to the : -

(1)Hormonal change in guard cells
(2)Change in Turgor pressure of guard cellsCorrect
(3)Gaseous exchange
(4)Respiration

Answer: (2)

Solution

Stomata open when the guard cells become turgid (K ions enter, water enters by osmosis, and the thin outer wall bulges so that the thick inner wall is pulled apart), and close when the guard cells lose water and become flaccid. Thus the

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Question ID VK-089095