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प्रश्न
Differentiate between the following:
Plasmolysis and Deplasmolysis.
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उत्तर
| Plasmolysis | Deplasmolysis | ||
| 1. | In this, the protoplasm of the cell shrinks away from the cell wall. It results in the flaccid condition of the cells and the plant. | 1. | In this, the protoplasm of the cell swells up and touches the cell wall. It results in the turgid condition of the cells and the plant. |
| 2. | Caused due to exosmosis. | 2. | Caused by endosmosis. |
| 3. | It takes place when a plant cell is kept in a hypertonic solution. | 3. | It takes place when a plasmolysed celI is kept in a hypotonic solution. |
| 4. | It results in the flaccid condition of the plant. | 4. | It results in the turgid condition of the plant. |
APPEARS IN
संबंधित प्रश्न
A plant cell may burst when :
The diagram below represents a process in plants. The setup was placed in bright sunlight. Answer the following questions:
a) Name the physiological process depicted in the diagram.
Why was oil added to the water?
b) When placed in bright sunlight for four hours, what do you observe with regard to the initial and final weight of the plant? Give a suitable reason for your answer
c) What happens to the level of water when this setup is placed in:
- Humid conditions?
- Windy conditions?
d) Mention any three adaptations found in plants to overcome the process mentioned in (i).
e) Explain the term ‘Guttation’.
The state of a cell in which the cell wall is rigid and stretched by the increase in volume due to the absorption of water is called.
Give the equivalent term for the following:
The condition in which the cell contents are shrunken.
Mention whether the following statement is true or false Correct the false statement by altering the last word only.
Cells that have lost their water content are said to be deplasmolysed.
What is the difference between ‘flaccid’ and ‘turgid’? Give one example of flaccid condition in plants.
Name the following:
The process by which wilting or drooping of leaves occurs.
Excessive use of fertilisers in agricultural fields reduces the yield of crops. Justify the statement.
Given below is the figure of a plant cell showing different kinds of pressure acting upon it. Study the figure and answer the questions that follow:
- In the figure, 1, 2 and 3 represent:
- Cytoplasm, Nucleus, Vacuole respectively
- Vacuole, Cytoplasm, Cell wall respectively.
- Cytoplasm, Cell membrane and vacuole respectively.
- Cytoplasm, Cell wall and Vacuole respectively.
- B in the figure represents:
- Osmotic pressure
- Turgor pressure
- Wall pressure
- Diffusion pressure
- A in the figure represents:
- irnbibition pressure
- Wall pressure
- Turgor pressure
- Osmotic pressure
- C in the figure represents:
- Turgor pressure
- Osmotic pressure
- Wall pressure
- Imbibition pressure
- Draw a neat and labelled diagram of a plasmolyzed plant cell.
