Q. No.What shall be the water potential of a root hair cell absorbing water from the soil?
1. Zero
2. Less than zero
3. More than zero
4. Infinite
1. Zero
2. Less than zero
3. More than zero
4. Infinite
The movement of ions against the concentration gradient will be:
| 1. Active transport | 2. Osmosis |
| 3. Diffusion | 4. All of the above |
Opening and closing of stomata are due to the:
1. Hormonal change in guard cells
2. Change in Turgor pressure of guard cells
3. Gaseous exchange
4. Respiration
Loading of phloem is related to:
1. Increase of sugar in phloem
2. Elongation of phloem cell
3. Separation of phloem parenchyma
4. Strengthening of phloem fiber
When water moves through a semipermeable membrane then which of the following pressure develops:
1. O.P.
2. S.P.
3. T.P.
4. W.P.
Osmotic potential and water potential of pure water are respectively:
1. 0 and 0
2. 0 and 1
3. 100 and 0
4. 100 and 100
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 |
Function of companion cells is:
| 1. | Loading of sucrose into sieve elements |
| 2. | Providing energy to sieve elements for active transport |
| 3. | Providing water to phloem |
| 4. | Loading of sucrose into sieve elements by passive transport |
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