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प्रश्न
Give reasons for the following:
If you sprinkle some common salt on grass growing on a lawn, it is killed at that spot.
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उत्तर
Common salt, when sprinkled on the grass, causes the plasmolysis of grass cells, ultimately leading to their death. Hence, if we sprinkle some common salt on grass growing on a lawn, it is killed on the spot.
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संबंधित प्रश्न
The diagram given below represents a plant cell after being placed in a strong sugar solution. Study the diagram and answer the questions that follow:
- What is the state of the cell shown in the diagram?
- Name the structure that acts as a selectively permeable membrane.
- Label the parts numbered 1 to 4 in the diagram.
- How can the above cell be brought back to its original condition? Mention the scientific term for the recovery of the cell.
- State any two features of the above plant cell which is not present in animal cells.
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 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.
Differentiate between the following:
Plasmolysis and Deplasmolysis.
Name the following:
The process by which wilting or drooping of leaves occurs.
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
Flaccidity is the reverse of turgidity.
Excessive use of fertilisers in agricultural fields reduces the yield of crops. Justify the statement.
The hydrostatic pressure of the cell sap on the cell wall is called ______.
Give the equivalent term for the following:
Pressure exerted by the cell contents on the cell wall.
