The opening and closing of stomata is controlled by the activity of

  • A
    guard cells
  • B
    epidermal cells
  • C
    mesophyll cells
  • D
    lenticels

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$II -$ It supplies water for photosynthesis.
$III -$ It transports minerals from the soil to all parts of the plant.
$IV -$ It cools leaf surfaces by $10-15^{\circ} C$ through evaporation.
$V -$ It maintains the shape and structure of plants by keeping cells turgid.

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