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प्रश्न
Give Reasons for the following.
Freshwater fish cannot survive in seawater.
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उत्तर
The seawater is saline (having more concentration of salts) and acts as a hypertonic solution for the freshwater. So freshwater fish cannot survive in seawater as it causes the plasmolysis of the cells of the fish and ultimately the fish will die.
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संबंधित प्रश्न
When placed in a more concentrated solution, the cell contents will ______.
Give two examples of turgor movements in plants.
Show by a series of diagrams, the change which a plant cell will undergo when placed in
Hypertonic salt solution
Explain why:
We gargle with saline solution in case of throat infection.
Give Reasons for the following.
We gargle with saline water in case of throat infection.
Give Reasons for the following.
Plants growing in fertilized soil are often found to wilt if the soil is not adequately watered. Why?
In the figure below ‘A’ shows a cell in the normal state and ‘B’ shows the same cell after leaving it in a certain solution for a few minutes.
(i) Describe the change which has occurred in the cell as seen in B.
(ii) Give the technical term for the condition of the cell as reached in B and as it was in A.
(iii) Define the process which led to this condition.
(iv) What was the solution-isotonic, hypotonic or hypertonic, in which the cell was kept?
(v) How can the cell in B, be brought back to its original condition?
(vi) Name the parts numbered 1 to 3.
Give a diagrammatic representation of plasmolysis in a cell.
Fill in the Blank
The pressure which develops in the cortical cells of root which force a part of the water upward ____________.
Fill in the Blank
A plasmolysed cell has __________ protoplast.
