Stomata when open lead to:

Of the processes which occur in leaves,the one which may lower their temperature (cooling effect) is

Phenylmercuric acetate $(PMA)$ results in which of the following effects?

The opening and closing of stomata are due to:

By which process is water lost from the plants in the form of water droplets?

$A.$ In dry atmosphere,the relative humidity is low,so the rate of transpiration increases.
$B.$ Slow breeze promotes the rate of transpiration.
$C.$ $ABA$ promotes transpiration.
$D.$ $A$ high salt concentration in soil water increases transpiration.