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प्रश्न
Give Reasons for the following.
We gargle with saline water in case of throat infection.
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उत्तर
The salt solution (saline water) is hypertonic and when we gargle with it, comes in contact of infection causing bacteria in the throat. The water present in the bacterial cell comes out causing plasmolysis and they get killed giving us relief from infection.
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संबंधित प्रश्न
Name the following:
The condition of a cell placed in a hypotonic solution.
Give two examples of turgor movements in plants.
Name the following:
Two solutions having same concentrations.
Choose the correct answer:
If a marine plant is transferred to fresh water, it bursts due to ___________
Mention whether the following statement is true (T) or false (F) and give explanation in support of your answer.
Plasmolysis is reverse of deplasmolysis.
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.
Given below is the figure of an experimental set up to demonstrate root pressure.
(i) Define root pressure.
(ii) What change would you observe in the water level after some time?
(iii) What role is being played by the root pressure in the given experiment?
(iv) Why the oil has been sprinkled on water?
Multiple Choice Question:
Marine fish when thrown under tap water bursts because of:
