1. | Active Transport | 2. | Osmosis |
3. | Facilitated Diffusion | 4. | Passive Transport |
List I | List II | ||
A. | Cohesion | I. | More attraction in liquid phase |
B. | Adhesion | II. | Mutual attraction among water molecules |
C. | Surface tension | III. | Water loss in liquid phase |
D. | Guttation | IV. | Attraction towards polar surfaces |
Options: | A | B | C | D |
1. | II | I | IV | III |
2. | II | IV | I | III |
3. | IV | III | II | I |
4. | III | I | IV | II |
A: | Mass flow is faster than diffusion. |
B: | Mass flow is the result of pressure difference between the end points. |
C: | Different substances involved in mass flow move at different paces. |
D: | Mass flow can result through either a positive or a negative hydrostatic pressure gradient. |
1. | (A), (C), (D) only | 2. | (B), (C), (D) only |
3. | (A), (B), (C) only | 4. | (A), (B), (D) only |
1. | in same direction with the help of different carriers located at a common site |
2. | in same direction with the help of different carriers located at different sites in the same cell |
3. | in same direction with the help of same carrier |
4. | in opposite direction with the help of same carrier |
I: | The process of translocation through phloem is unidirectional but through xylem, it is bidirectional |
II: | The most readily mobilized elements are phosphorus, sulphur, nitrogen and potassium. |
Statement I: | The forces generated by transpiration can lift a xylem-sized column of water over 130 meters height. |
Statement II: | Transpiration cools leaf surfaces sometimes 10 to 15 degrees, by evaporative cooling. |
1. | size of the stomatal aperture |
2. | distribution of stomata on the upper and lower epidermis |
3. | cohesion and adhesion between water molecules |
4. | root pressure |
Which of the following was proved by girdling experiment?
1. | Apoplastic movement of water occurs through intercellular spaces |
2. | Symplastic movement of water occurs through interconnected protoplast |
3. | Xylem is responsible for uptake of water |
4. | Phloem is responsible for translocation of food |
Which of the following physical properties of water is/are responsible for providing water, the high tensile strength and high capillarity during ascent of sap in the plants?
1. Surface tension and cohesion
2. Cohesion, adhesion and surface tension
3. Cohesion only
4. Adhesion and cohesion