Who proposed the "Relay pump theory" of ascent of sap?

Assertion $A$: In the process of ascent of sap,water rises as a continuous column.
Reason $R$: The cohesive force between water molecules is very high.
Which option is correct for Assertion $A$ and Reason $R$?

Given below are two statements.
Statement $I$ - Presence of capillary water is essential.
Statement $II$ - High concentration of solutes in soil water reduces the rate of absorption of water.
In the light of the above statements,select the correct option given below:

$A$ plant experiencing rapid transpiration will exhibit which of the following?

Keep some freshly cut flowers in a solution of food colour. Wait for some time for the colour to rise in the flower. When the stem of the flower is held up to the light,coloured strands can be seen inside. Can this experiment demonstrate which tissue is conducting water up the stem?

The path of water movement from soil to xylem is: