Due to low atmospheric pressure,the rate of transpiration will

Describe: Transpiration Pull.

What happens when the rate of transpiration exceeds the rate of absorption?

Wilting of leaves in hot weather is due to

When strips of cobalt chloride paper are placed on either side of a dorsiventral leaf,why do the strips on the lower side become pink more speedily?

$A-$ 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.