Q. No.
Stomatal movement is not affected by:
1. Temperature
2. Light
3. O2 concentration
4. CO2 concentration
1. Temperature
2. Light
3. O2 concentration
4. CO2 concentration
| 1. | Both processes can happen together because the diffusion coefficient of water and CO2 is different |
| 2. | The above processes happen only during the night-time. |
| 3. | One process occurs happen only in the daytime and the other at night |
| 4. | Both processes cannot happen simultaneously |
In a ring-girdled plant:
2. the root dies first
3. the shoot and root die together
4. Neither root nor shoot will die
Which one of the following is correctly matched?
1. Passive transport of nutrients-ATP
2. Apoplast- Plasmodesmata
3. Potassium- Readily mobilized
4. Bakanae of rice seedlings-F Skoog
| 1. | Calcium | 2. | Potassium |
| 3. | Sulphur | 4. | Phosphorus |
The rupture and fractionation do not usually occur in water column in vessel/tracheid’s during the ascent of sap because of:
1. Lignified thick walls
2. Cohesion and adhesion
3. Weak gravitational pull
4. Transpiration pull
Xylem translocates:
1. Water, minerals salts, some nitrogen and hormones
2. Water only
3. Water and mineral salts only
4. Water, mineral and some organic nitrogen only
What is the direction of movement of sugars in phloem?
1. Bi-directional
2. Non-multidirectional
3. Upward
4. Downward
If a cell A with DPD, 4 bars is connected to cells B, C, D whose OP and TP are respectively 4 and and 4, 10 and 5 and 7 and 3 bar, the flow of water will be:
1. C to A, B and D
2. A and D to B and C
3. A to B, C and D
4. B to A, C and D
Plant cells submerges in distilled water will become:
1. Turgid
2. Flaccid
3. Plasmolysed
4. Impermeable.
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