Ascent of Sap

Which of the following helps in ascent of sap?

Xylem sap is made up of 

Select the odd one out:

What is responsible for guttation?

A column of water within xylem vessels of tall trees does not break under its weight because of

Choose the correct match given in Column I with their role given in Column II.

Cohesion theory of ascent of sap is based on

Which of the following is more during the night $?$

Ascent of sap in plants explains

Sap in xylem flows out through the cut end of the well-watered stem of a plant, this phenomenon is called:

The continuation of excretion of watery liquid for some time from the stem of a well-watered plant, after cutting off the shoot slightly above the base, is due to

Root pressure can be measured by means of:

Ascent of sap refers to the movement of water from

Guard cells differ from epidermal cells in having

The movement of materials through the vascular tissue of plants is called

Root pressure on a tree is typically about $2-6$ atm. This is sufficient to raise the water level up to a few feet. Tall trees get water at the top due to:

In an experiment to monitor the ascent of sap, the following treatments were carried out to a twig dipped in water. In which case wilting will be observed? 

Dixon and Jolly are associated with-

Root pressure is maximum when:

The ultimate cause for the movement of water against gravity in a tree is :