Water is mainly transported to shoot tips by the help of

Dixon and Jolly are famous for

An example of a selectively permeable membrane can be best deduced from the passage of water and mineral salts from:

In plants,the movement of water against gravitational force is due to

The effect of root pressure is observable at night and early morning when:

In the elements of xylem,water rises to a certain height in the xylem vessels. Which pressure force in the xylem is useful for maintaining metabolic activities?