In the given figure,which component has thin outer walls and highly thickened inner walls?

The difference between apple and mulberry type of stomatal distribution is:

Stomata in angiosperms open and close due to

Identify the purposes of transpiration.
$I -$ Transpiration creates a transpiration pull for absorption and transport in plants.
$II -$ 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.

During stomatal opening (photoactive),which of the following does not occur?

Stomata open in the night at alkaline or neutral $pH$ (in the atmosphere of ammonia vapours). This statement was given by