Which of the following is $NOT$ included in the stomatal apparatus?

Early in the morning,excess of water collects in the form of droplets near the tip of leaves of herbaceous plants,this is due to

Which of the following leaves would dry up last?

Differentiate between the following: Guttation and Transpiration.

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.

Which one is true about guttation?