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प्रश्न
Give Reasons for the following.
On sprinkling common salt on grass growing in a lawn, the grass is killed.
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उत्तर
Sprinkling salt makes soil solution hypertonic hence grass lose water due to exosmosis.
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संबंधित प्रश्न
Give the equivalent terms for the following:
Pressure of the cell contents on the cell wall
The bending movements of certain flowers towards the sun and the sleep movements of certain plants at night are examples of ______.
Leaves of the sensitive plant wilt and droop down on a slight touch. What mechanism brings about this change?
The following diagram represents a plant cell after being placed in a strong sugar solution.
Guidelines 1 to 5 indicate the following
(1)Cell wall, (2) Strong sugar solution, (3) Protoplasm (4) Large vacuole, (5) Nucleus
(1)What is the state of the cell shown in the cell shown in the diagram?
(2)Name the structure which acts as a selectively permeable membrane.
(3)If the cell had been placed in distilled water instead of strong sugar solution, which feature would not have been seen?
(4)Name any one feature of this plant cell which is not present in an animal cell.
Name the following:
The pressure with which the molecules of a substance diffuse.
Mention whether the following statement is true (T) or false (F) and give explanation in support of your answer.
Plasmolysis is reverse of deplasmolysis.
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:
Comment on the nature (tonicity) of the liquid surrounding the cell.
What is the significance of diffusion?
Give Technical Term for the following.
A solution whose concentration is equal to the cell sap.
Give Technical Term for the following.
A solution whose concentration is greater than that of the cell sap.
