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Question
Give Reasons for the following.
Plants growing in fertilized soil are often found to wilt if the soil is not adequately watered. Why?
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Solution
The concentration of water molecules being less outside, endosmosis takes place resulting in the wilting of the plants.
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Give Reasons for the following.
Salt and sugar are used in preserving food.
Differentiate between:
Osmosis and Diffusion
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?
Multiple Choice Question:
When a plant wilts, the sequence of events will be as follows:
Explain the term:
Plasmolysis
