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प्रश्न
Differentiate between the following
Endosmosis and Exosmosis
उत्तर
| PEndosmosis | Exosmosis |
| It occurs when a cell is placed in a hypotonic solution. | It occurs when a cell is placed in a hypertonic solution. |
| Water moves into the cell. | Water moves out of the cell |
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संबंधित प्रश्न
Give reason for the following:
Potato cubes, when placed in water, become firm and increase in size.
The following diagram represents a plant cell after being placed in a strong sugar solution.
Guidelines 1 to 5 indicate the following
(1)Cell wall, (2) Strong sugar solution, (3) Protoplasm (4) Large vacuole, (5) Nucleus
(1)What is the state of the cell shown in the cell shown in the diagram?
(2)Name the structure which acts as a selectively permeable membrane.
(3)If the cell had been placed in distilled water instead of strong sugar solution, which feature would not have been seen?
(4)Name any one feature of this plant cell which is not present in an animal cell.
Explain why:
The leaves of wilted lettuce, if kept in cold water, become crisp.
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:
Account for the softness and decrease in size of the potato cubes which were placed in sugar solution.
Give Reasons for the following.
On sprinkling common salt on grass growing in a lawn, the grass is killed.
Give Reasons for the following.
We gargle with saline water in case of throat infection.
Give Reasons for the following.
Plants begin to die when the excess of soluble fertilizers are added to the soil?
In an experiment, two sets of apparatus were set up as shown below:
In A there is a concentrated sugar solution inside the thistle funnel and red ink in the water outside the funnel. In B there is a concentrated glucose solution with red ink inside the thistle funnel and water outside the thistle funnel.
In both A and B the level of liquid inside the funnels rises up the tubes. In A the sugar solution turns red and in B, the water turns red.
Study the given observations and answer these questions:
- Name the process by which red ink moves in A and B.
- Which type of pressure forces the water molecules to move towards thistle funnels and cause a rise in the water level?
- Where does this process occur in plants and animals?
- What material could be used as a semi-permeable membrane?
Name the following:
The pressure through which water can rise upto some feet.
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.
