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प्रश्न
Complete the following cycle given as figure by filling the boxes (a), (b), (c), (d).
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उत्तर
The cycle given above represents the nitrogen cycle occurring in the environment.
The atmospheric nitrogen cannot be taken up by plants and animals as such, this is corrected by some bacteria and blue-green algae present in the soil. These microbes fix the atmospheric nitrogen into usable components which are utilised by other living organisms.
Nitrogen cycle checks the percentage of nitrogen in the atmosphere and maintains it at a constant level.
- Lightning fixes nitrogen.
- Nitrogen-fixing bacteria and blue-green algae fix atmospheric nitrogen.
- Nitrogenous waste from excretion and death.
- Bacteria turn compounds of nitrogen into gaseous nitrogen.
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संबंधित प्रश्न
Talk to the elderly people in your family to find the answers to the following questions, with reference to the foodstuffs mentioned below: Milk, vegetables, grains, flours, sugar, jaggery.
What measures are taken to keep the foodstuffs in the house in good condition, for as long as possible?
Here is Nandini‘s lunch box.
- Are all the items healthy?
- Suggest her to remove one food which is not healthy and add one food which is healthy. Give reasons for change.
We make Idiyappam by _______ method.
Biriyani is a raw food.
Draw one of your favourite raw food and colour it.
Write about any two preservation methods.
Irradiation affects the taste of the food materials.
Write about food preservation methods.
Explain any two methods of food preservation.
List the methods of food preservation.
