$A-$ The inner wall of each guard cell,towards the pore or stomatal aperture,is thick and elastic.
$R -$ Cellulose microfibrils are oriented longitudinally in the cell walls of the guard cells.

  • A
    $A$ and $R$ are correct
  • B
    $A$ and $R$ are incorrect
  • C
    $A$ is correct,$R$ is incorrect
  • D
    $A$ is incorrect,$R$ is correct

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