Pure water has maximum water potential. Water potential in the leaf tissue becomes greater than pure water under conditions of excessive humidity when the leaves cannot lose water by transpiration. Hence, water is lost as droplets via hydathodes by the process of guttation.

Correct Option: D

Pure water has maximum water potential. Water potential in the leaf tissue becomes greater than pure water under conditions of excessive humidity when the leaves cannot lose water by transpiration. Hence, water is lost as droplets via hydathodes by the process of guttation.

Movement of ions against concentration gradient involves the expenditure of energy. Diffusion involves the movement of solute particles from region of higher concentration to a region of lower concentration. Pinocytosis is cell drinking. Brownian movement is the random to and fro movement of atoms and molecules.

Correct Option: B

Movement of ions against concentration gradient involves the expenditure of energy. Diffusion involves the movement of solute particles from region of higher concentration to a region of lower concentration. Pinocytosis is cell drinking. Brownian movement is the random to and fro movement of atoms and molecules.

Osmosis is the movement of solvent particles from a region of low solute concentration to a region of high solute concentration through a selectively permeable membrane. Active absorption involves use of ATP.

Correct Option: C

Osmosis is the movement of solvent particles from a region of low solute concentration to a region of high solute concentration through a selectively permeable membrane. Active absorption involves use of ATP.

D.P.D. or suction pressure (S.P.) = O.P. – T. P.
Hence D.P.D. for A = 4 bars, B = 0 bars, C = 5 bars, D = 4 bars
We know that direction of movement of water is from lower D.P.D. (S.P.) to higher D.P.D. (S.P.). Thus flow will be from B to A, C, and D.

Correct Option: C

D.P.D. or suction pressure (S.P.) = O.P. – T. P.
Hence D.P.D. for A = 4 bars, B = 0 bars, C = 5 bars, D = 4 bars
We know that direction of movement of water is from lower D.P.D. (S.P.) to higher D.P.D. (S.P.). Thus flow will be from B to A, C, and D.

Active transport always involves the expenditure of energy for the movement of substances against concentration gradient.

Correct Option: B

Active transport always involves the expenditure of energy for the movement of substances against concentration gradient.