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प्रश्न
Give at least three uses of water to green plants
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उत्तर
(i) Water is major component of protoplasm.
(ii) It is an important raw material for photosynthesis.
(iii) Most metabolic and enzymatic reactions take place in the presence of water.
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संबंधित प्रश्न
Differentiate between Turgor pressure and Wall pressure (explain)
When placed in a more concentrated solution, the cell contents will ______.
Give two examples of turgor movements in plants.
Distinguish between the following:
Turgor pressure and osmotic pressure
Choose the correct answer:
If a marine plant is transferred to fresh water, it bursts due to ___________
Give Reasons for the following.
On sprinkling common salt on grass growing in a lawn, the grass is killed.
A plant cell kept in a drop of water was examined under the low power magnification of a microscope, as shown:
(i) What would you do to bring this cell back to its original condition?
(ii) What scientific term is used for such condition?
(iii) Draw the same cell if it is kept in a strong sugar solution.
The beaker is divided into two chambers A and B. The big circle represents solute and the small circles solvent.
(i) What can you say about the size of the holes in the membrane, if it is to behave semi- permeably between these two?
(ii) Will the solvent molecules pass through the membrane from left to right, from right to left, in either direction or in both directions?
(iii) In which direction will there be a net movement of solvent molecules?
Fill in the Blank
Raisin swells up when kept in a __________ solution.
