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प्रश्न
Give Reasons for the following.
Salt and sugar are used in preserving food.
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उत्तर
Salt and sugar increase the concentration of food, destroying bacteria by plasmolysis.
संबंधित प्रश्न
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?
Choose the correct answer:
Plasmolysis will occur when the cell is placed in a __________
Give Reasons for the following.
Freshwater fish cannot survive in seawater.
Give a diagrammatic representation of plasmolysis in a cell.
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:
When a plant wilts, the sequence of events will be as follows:
Name the two organelles in a plant cell that contain their own genetic material and ribosomes.
When a cell in solution shrinks and loses its shape, then the solution is ______.
