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. |
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 |
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
Match List - I with List-II.
List-I | List-II |
a. Cohesion b. Adhesion c. Surface tension d. Guttation |
i. More attraction in the liquid phase ii. Mutual attraction among water molecules iii. Water loss in liquid phase iv. Attraction toward polar surfaces |
Choose the correct answer from the options given below:
Options: | (a) | (b) | (c) | (d) |
1. | iii | i | iv | ii |
2. | ii | i | iv | iii |
3. | ii | iv | i | iii |
4. | iv | iii | ii | i |
The process responsible for facilitating loss of water in liquid form from the tip of grass blades at night and early morning is:
1. Root pressure
2. Imbibition
3. Plasmolysis
4. Transpiration
Transpiration and root pressure cause water to rise in plants by:
Guttation is the result of:
1. Root pressure
2. Diffusion
3. Transpiration
4. Osmosis