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प्रश्न
Why is water important for plants and animals?
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उत्तर
Importance of water for plants:
1. Plants need water to prepare their food, for germination and growth to produce fruits, flowers, etc.
2. For conduction of food prepared by plants to other-parts of plant i.e., for translocation.
3. Large number of plants live in water; water provides nutrients and oxygen for their survival. Crops need water for their growth. Water in the form of rain, washes the dust and smoke deposited on leaves by vehicles and helps the stomata in exchanging gases.
Importance of water for animals:
1. Lot of water is lost by the body of animals by sweating, in the form of urine and evaporation while doing various activities, so to make up for the lost water animals consume a lot of water in the form of drinking.
2. Water keeps the animals fresh and is a natural medicine for their many ailments.
3. Water is a good solvent and helps in the process of digestion, blood circulation, excretion, etc. in the body of organisms.
4. Water is essential for the cleanliness of animals and their surroundings
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संबंधित प्रश्न
Give the percentage of water in the following:
Rice and wheat grains
Give the importance of water in household purpose
State whether the following statement is true or false. If false, write the correct statement.
Water finds application as a means of transporting goods.
State whether the following statement is true or false. If false, write the correct statement.
Purification of water is carried out to remove – dissolved gases e.g. carbon dioxide and dissolved minerals like magnesium salts.
State whether the following statement is true or false. If false, write the correct statement.
Respiration uses up water from the atmosphere.
State whether the following statement is true or false. If false, write the correct statement.
Sodium carbonate and sodium sulphate do not form an aqueous solution.
Match the statements in List I, 1-10 with their correct answer in List II, A to J.
| List I | List II |
| 1. Sodium carbonate and water | A: Seawater |
| 2. Chemical used in sedimentation during purification of water | B: The preferred place for an organism |
| 3. vapourisation | C: Liquid state |
| 4. Kerosene and water | D: Aqueous solution |
| 5. A solution which can dissolve more of solute at a given temperature | E: Dissolved gases and minerals |
| 6. Water as a habitat for marine life | F: Unsaturated solution |
| 7. A water-borne disease | G: Immiscible mixture |
| 8. Existence of water between 0°C and 100°C | H: Liquid to a gaseous state |
| 9. Taste in water is due to | I: Dysentery |
| 10. The most impure form of water | J: Alum |
Explain the meaning of the following term:
Saturated solution
Using R.O. (Reverse Osmosis) plant at home eliminates lot of non-potable water. The best way to effectively use the expelled water of R.O. plant is ______.
______ forests are found in pichavaram near Chidambaram
