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प्रश्न
Give Reasons for the following.
Plants growing in fertilized soil are often found to wilt if the soil is not adequately watered. Why?
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उत्तर
The concentration of water molecules being less outside, endosmosis takes place resulting in the wilting of the plants.
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संबंधित प्रश्न
Movement of molecules of a substance from the region of their higher concentration to the region of their lower concentration without the involvement a separating membrane, is called
Choose the correct answer:
Grapes when placed in a strong sugar solution shrink because of __________
Two potato cubes each 1 cm3 in size, were placed separately in two containers (A and B), the container A having water and the other (B) containing concentrated sugar solution. After 24 hours when the cubes were examined, those placed in water were found to be firm and had increased slightly in size and those placed in concentrated sugar solution were found to be soft and somewhat decreased in size. Use the above information to answer the questions that follow:
Name and define the physical process being investigated in this experiment.
A leaf cell of a water plant was placed in a liquid other than pond water. After sometime, it assumed a shape as shown below:

Redraw in the space provided, the diagram of the cell if it is soon placed in ordinary water for some time.
Give Reasons for the following.
It is necessary to maintain a normal osmotic concentration of the blood.
Give Reasons for the following.
On sprinkling common salt on grass growing in a lawn, the grass is killed.
Give Reasons for the following.
We gargle with saline water in case of throat infection.
Give a diagrammatic representation of plasmolysis in a cell.
