Nitrogen Cycle As Resource
Nitrogen Cycle As Resource
Nitrogen Cycle
Nitrogen comprises 78 to 79 per cent of the earth’s atmosphere. It is an important constituent of plant and animal protein, which forms the structural and functional component of cells. Nitrogen is also present in DNA, RNA, vitamins, urea and alkaloids. Before studying the nitrogen cycle, you should understand the following processes.
Nitrogen Cycle in Nature
Atmospheric nitrogen is used only by a few simple organisms. Nitrogen is converted to complex compounds in organisms. These are finally converted to nitrogen in the atmosphere. The cyclic pathway by which nitrogen is circulated continuously through the living and nonliving components of the biosphere is called the nitrogen cycle
Which of the following are correct : (a) Nitrogen comprises 78 to 79 per cent of the earth’s atmosphere. (b) Nitrogen is present in DNA, RNA, vitamins, urea and alkaloids. (c) Atmospheric nitrogen is used only by a few simple organisms. | |||
| Right Option : D | |||
| View Explanation | |||
Human -caused changes to the nitrogen cycle are expected to result in | |||
| Right Option : D | |||
| View Explanation |
________________ is converted to complex compounds in organisms. | |||
| Right Option : C | |||
| View Explanation | |||
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