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Guard cells help in:

  1. A
    Transpiration
  2. B
    Guttation
  3. C
    Fighting against infection
  4. D
    Protection against grazing

Solution & Step-by-step Explanation

Guard cells surround the stomatal pore. They regulate the opening and closing of stomata, which primarily facilitates gas exchange and transpiration (loss of water vapor from the plant surface).

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Guard cells help in:
A
Transpiration
B
Guttation
C
Fighting against infection
D
Protection against grazing

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