When the cut stump of a plant is fitted with a manometer,the level of mercury rises due to the accumulation of:

$A$ mutant plant is unable to produce materials or precursors that form the Casparian strip. This plant would be:

The destruction of the protoplast is a primary requirement for which of the following important functions?

Given below are two statements about the ascent of sap in plants.
$Statement-I$: Under normal conditions, the sap in the xylem cells shows negative hydrostatic pressure.
$Statement-II$: It also shows high osmotic pressure.
In the light of the above statements, select the correct option given below:

When the concentration of the soil solutes is low,the absorption of water

When the temperature of a soil becomes $1^o C$,then