NEET Biology question

Not in NEET syllabus

Opening and closing of stomata is due to

(A)Hormonal change in guard cells
(B)Change in turgor pressure of guard cellsCorrect
(C)Gaseous exchange
(D)Respiration

Answer: (B)

Solution

Stomatal opening and closing are directly governed by changes in the turgor pressure of guard cells: increased turgor (due to K⁺ and water influx) opens the pore, while decreased turgor (due to K⁺

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Question ID VK-127848