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प्रश्न
Define the following term:
Tonicity
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उत्तर
The relative concentration of the solutions that determines the direction and extent of diffusion is called tonicity.
संबंधित प्रश्न
Differentiate between the following pairs on the basis of what is indicated in the brackets.
Hypotonic solution and Hypertonic solution [condition of a plant cell when placed in them]
Leaves of the sensitive plant wilt and droop down on a slight touch. What mechanism brings about this change?
Define the term:
Plasmolysis
Mention whether the following statement is true (T) or false (F) and give explanation in support of your answer.
Plasmolysis is reverse of deplasmolysis.
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.
What do you mean by transpiration pull ?
Give Reasons for the following.
On sprinkling common salt on grass growing in a lawn, the grass is killed.
Give Reasons for the following.
Drops of water on a leaf of plant like peepal does not enter the leaf by osmosis?
Give a diagrammatic representation of plasmolysis in a cell.
Name the following:
Name the process by which water enters the root hair cell.
