Question

Name the following:
(i) The pressure with which the molecules of a substance diffuse.
(ii) Two solutions having same concentrations.
(iii) The force developing in shoot responsible for most of the absorption of water.
(iv) The uptake of mineral ions against concentration gradient.
(v) Tissue concerned with upward conduction of water.
(vi) Condition of cell in which the cell contents are shrunken.
(vii) The inward movement of solvent molecules through the plasma membrane of cell.
(viii) The process by which raisins swell up when placed in a beaker of water.
(ix) Movement of molecules from a region of high concentration to a region of low concentration.

Answer 1

(i) The pressure with which the molecules of a substance diffuse is known as osmotic pressure.

(ii) Two solutions that have the same concentrations are known as isotonic solutions.

(iii) The force developing in a shoot responsible for most of the absorption of water is known as transpiration pull.

(iv) The uptake of mineral ions against a concentration gradient is known as active diffusion.

(v) Xylem is the tissue concerned with the upward conduction of water.

(vi) Plasmolysis is the condition of a cell in which the cell contents are shrunken.

(vii) The inward movement of solvent molecules through the plasma membrane of a cell is known as endosmosis.

(viii) The process by which raisins swell up when placed in a beaker of water is known as endosmosis.

(ix) The movement of molecules from a region of higher concentration to a region of lower concentration is known as diffusion.