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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
APPEARS IN
संबंधित प्रश्न
Give the percentage of water in the following:
Bread
Write True or False for the following statement.
Tap water does not contain dissolved impurities.
State whether the following statement is true or false. If false, write the correct statement.
Respiration uses up water from the atmosphere.
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
Name the following
The natural process by which circulation of water takes place from the earth’s surface to the atmosphere and back to the earth’s surface.
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 ______.
Analogy
Ground water : ______ :: Surface-water : lakes
Transpiration is a process in which plants ______.
How do the areas covered with concrete affect the availability of ground water?
