Stomata are absent in:

$A-$ 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.

Observe the diagram and answer the following.
$(a)$ Which of these shows a higher water content $(i)$ or $(ii)$?

Water vapour comes out from the plant leaf through the stomatal opening. Through the same stomatal opening,carbon dioxide diffuses into the plant during photosynthesis. Reason out the above statements using one of the following options.

In angiosperms,the opening and closing of stomata are based on which of the following?

Transpiration pull is maximum under which of the following conditions?