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प्रश्न
Differentiate between the following:
Turgor pressure and wall pressure
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उत्तर
| Turgor Pressure | Wall Pressure | ||
| 1. | The hydrostatic pressure that endosmosis creates against the cell wall is known as turgor pressure. | 1. | The force that the cell wall exerts against turgor pressure is known as wall pressure. |
| 2. | Turgor pressure acts on the cell wall. | 2. | Cell wall pressure is generated by the cell wall. |
| 3. | Turgor pressure keeps plant stems upright, expands leaves and aids in the opening and closing of stomata, among other things. | 3. | Wall pressure maintains cell and plant structure. |
| 4. | The direction of Turgor pressure is towards the outside. | 4. | The direction of wall pressure is towards the inside of the cell. |
संबंधित प्रश्न
Give the equivalent terms for the following:
Loss of water through a cut stem.
Give reason for the following:
It is better to transplant seedlings in a flower-bed in the evening and not in the morning.
Give reason for the following:
A plant cell, when kept in a hypertonic salt solution for about 30 minutes, turns flaccid.
The below diagram represents a plant cell after being placed in a strong sugar solution. Guidelines 1 to 5 indicate the following:
1. Cell wall
2. Plasma membrane.
3. Protoplasm
4. Large vacuole
5. Nucleus
Study the diagram and answer the questions that follow :
(i) What is the state of the cell shown in the diagram?
(ii) Name the structure which acts as a selectively permeable membrane.
(iii) If the cell had been placed in distilled water instead of a strong sugar solution which features: would not have been present?
(iv) If the cell in the diagram possessed chloroplasts where would these be present?
(v) Name any one feature of this plant cell which is not present in animal cells.
Give Technical Term for the following.
The pressure exerted by cell contents on a plant cell wall.
Name the following:
The condition in which the contents of a cell exert pressure against the cell wall making it distended.
Fill in the Blank
Wilting and drooping of leaves is due to loss of ________.
Deplasmolysis occurs when a plasmolysed cell is placed in ______.
Addition of salt to pickles is a method of killing the bacteria by ______.
The figure given below is a diagrammatic representation of a part of the cross-section of the root in the root hair zone. Study the same and then answer the questions that follow:
- The parts labelled as 1, 2, 3 and 4 are:
- Root hair, Xylem vessel, Soil particles, Cortex respectively.
- Xylem vessel, Soil particles, Root hair, Cortex respectively.
- Root hair, Xylem vessel, Cortex, Soil particles respectively.
- Cortex, Soil particles, Xylem vessel, Root hair respectively.
- The process that enables the passage of water from soil into the root hair is:
- Diffusion
- Active transport
- Osmosis
- Passive absorption
- The kind of force which exists between a liquid and any surface is called as:
- Cohesive force
- Adhesive force
- Capillarity
- Suction force
- The kind of force between the same kind of liquid molecules is:
- Capillary force
- Transpirational pull
- Adhesive force
- Cohesive force
- Sometimes exudation of water occurs from the margin of the leaves in the early morning or night. It is termed as:
- Transpiration
- Guttation
- Bleeding
- Osmosis
