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Question
What is the significance of diffusion?
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Solution
Significance of Diffusion
(i) It helps in the exchange of respiratory gases.
(ii) It helps in the transport of food molecules without the plant body.
RELATED QUESTIONS
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?
Differentiate between the following:
Plasmolysis and deplasmolysis
Give reason for the following:
Potato cubes, when placed in water, become firm and increase in size.
Show by a series of diagrams, the change which a plant cell will undergo when placed in
Hypertonic salt solution
Name the following:
Movement of molecules from a region of high concentration to a region of low concentration.
Give Reasons for the following.
Freshwater fish cannot survive in seawater.
Name the following:
Condition of cell in which the cell content are shrunken.
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
Cells that have lost their water content are said to be deplasmolysed.
Explain the Term: Endosmosis
