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What causes the opening and closing of g...

What causes the opening and closing of guard cells of stomata during transpiration?

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The general mechanism of stomatal movement is based on entry and exit of water molecules in guard cells . When the turgidity increases within the guard cells the stomata open . When guard cells lose water it becomes flaccid and the stomata closses .
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Knowledge Check

  • In grasses the guard cells in stoma are:

    A
    bean shaped
    B
    irregular shaped
    C
    dumbbell shaped
    D
    bell shaped

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