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

Read the following statements carefully and choose the right answer from the codes given below:
$I$. $PMA$ and silicon oil of low viscosity are considered as antitranspirants.
$II$. $BAP$,$NAA$,and cobalt chloride are also used as antitranspirants.
$III$. Abscisic acid $(ABA)$ affects the mechanism of opening and closing of stomata.
$IV$. Starch of guard cells is converted into $PEP$ (phosphoenolpyruvate) ions by the process of hydrolysis.
$V$. Potometer works on the principle of potential difference between the tip of the tube and that of the plant.
$VI$. Transpiration rate is directly proportional to the relative humidity.

How much percentage of water is utilized for cell expansion and plant growth (in $\%$)?

Root pressure exceeds over transpiration pull during

When sugar in guard cells is converted into starch,the stomatal pore $..........$

Assertion : Light is a very important factor in transpiration.
Reason : Light induces stomatal opening and darkness closing of stomata. Therefore,transpiration increases in light and decreases in dark.