Which of the following may be used as an anti-transpirant in plants?

When the concentration of solutes in guard cells decreases,then...

What happens to the rate of transpiration when the temperature increases?

In the mechanism of opening of stomata,the important factor is the

Rate of transpiration is increased by

Arrange the events of opening stomata in correct sequence and choose the correct option accordingly.
$I.$ Lowering of osmotic potential of guard cells
$II.$ Decline in guard cell solute
$III.$ Rise of potassium ion level in guard cells
$IV.$ Guard cells absorb water from neighbouring epidermal cells
$V.$ Guard cells become flaccid
$VI.$ Guard cells swell and create a pore between them