The trunk of a tree shrinks in the day due to

Which process is shown in the figure below?

Maximum water loss in plants takes place through which of the following?

Select the incorrect statement from the following.

$A$ metal ion involved in stomatal regulation is

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