Question

opening and closing of stomata is due to :



A)diffusion
B)osmosis
C)filtration
D)imbibition

Answer 1

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Answer 2

Diffusion.

• Opening and closing of stomata exist due to turgor changes in guard cells.
• When guard cells are swollen, the stomatal pore is open, while in flaccid conditions, the stomatal aperture closes or wraps.
• Other theories explain the opening and the closing of the stomatal pore. Guard cells control the locking and unlocking of stomata.
• The turgor pressure, the osmotic flow of water in the guard cells, regulates the opening and closing of stomata.
• When the guard cells become swollen, they expand, causing stomata to unlock.