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प्रश्न
Explain why:
The leaves of wilted lettuce, if kept in cold water, become crisp.
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उत्तर
The leaves of the wilted lettuce become crisp when kept in cold water because they take up water due to endosmosis in hypotonic solution.
संबंधित प्रश्न
A candidate in order to study the process of osmosis has taken 3 potato cubes and put them in 3 different beakers containing 3 different solutions. After 24 hours, in the first beaker the potato cube increased in size, in the second beaker the potato cube decreased in size and in the third beaker there was no change in the size of the potato cube. The following diagram shows the result of the same experiment:
(i) Give the technical terms of the solutions used in beakers, 1, 2 and 3.
(ii) In beaker 3, the size of the potato cube remains the same. Explain the reason in brief.
(iii) Write the specific feature of the cell sap of root hairs which helps in absorption of water.
(iv) What is osmosis?
(v) How does a cell wall and a cell membrane differ in their permeability?
Name the following:
The condition of a cell placed in a hypotonic solution.
Complete the following statements:
Hypotonic solution is one in which the solution kept outside the cell has lower solute concentration than ……………… the cell.
Show by a series of diagrams, the change which a plant cell will undergo when placed in
Hypotonic salt solution
Name the following:
The process by which raisins swell up when placed in a beaker of water.
Choose the correct answer:
Grapes when placed in a strong sugar solution shrink because of __________
What do you mean by transpiration pull ?
Give Technical Term for the following.
A solution whose concentration is equal to the cell sap.
Fill in the Blank
The pressure which develops in the cortical cells of root which force a part of the water upward ____________.
Explain the term:
Diffusion
