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प्रश्न
How do the roots of land plants get oxygen for breathing?
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उत्तर
The roots can absorb oxygen from the small air spaces in soil.
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संबंधित प्रश्न
Briefly state the importance of Nitrogen.
Explain the importance of nitrogen of the air for plant growth.
Give a reason why two different rare (inert) gases find application in advertisement signs and fluorescent bulbs.
Match the statements in List 1 with the correct answers in List 2
| List 1 | List 2 | ||
| 1 | An impurity in air | A | Water vapour |
| 2 | The component of air which supports combustion | B | Respiration |
| 3 | The inert component in the air slightly soluble in water | C | Rare gases |
| 4 | The component of air which minimizes the rate of evaporation | D | Sulphur dioxide |
| 5 | The process which involves oxidation of food substance in living organisms | E | Helium |
| 6 | The component of air which finds application in observation balloons | F | Carbon dioxide |
| 7 | The process which involves oxidation of substances, liberating heat and light energy | G | Combustion |
| 8 | The component of air which is heavier than air and fairly soluble in water | H | Nitrogen |
| 9 | The process by which atmospheric carbon dioxide is absorbed by plants resulting in the formation of carbohydrates | I | Photosynthesis |
| 10 | The component of air which is lighter than air and less than 1% in air | J | Oxygen |
Complete the statement given below by filling in the blank with the correct word from the words given:
The component of air which is variable in air above sea level and in air in general ______.
Air is made up of oxygen only.
List uses of oxygen.
The second major component of air is oxygen.
Oxygen is used to oxidize ______.
Observe the picture given in Fig. carefully and answer the following questions.
Why is he putting a cover on his nose?
