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प्रश्न
Write a note on nitrogen fixation?
उत्तर
The process of bio-fixation of nitrogen is called nitrogen fixation. It is usually carried out by industrial nitrogen fixation, i.e., manufacturing of ammonium salts and urea or chemical fertilisers or by nitrogen-fixing bacteria (Azotobacter and Rhizobium). These bacteria convert the atmospheric nitrogen into water-soluble nitrates for the use of plants.
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संबंधित प्रश्न
Long Answer Question:
Explain biological nitrogen fixation with example.
How do human activities affect nitrogen cycle?
When we breathe in air, nitrogen also goes inside along with oxygen. What is the fate of this nitrogen?
Polio drops are not given to children suffering from diarrhoea. Why?
Match Column - I with Column - II.
| Column - I | Column - II | ||
| (a) | Nitrococcus | (i) | Denitrification |
| (b) | Rhizobium | (ii) | Conversion of ammonia to nitrite |
| (c) | Thiobacillus | (iii) | Conversion of nitrite to nitrate |
| (d) | Nitrobacter | (iv) | Conversion of atmospheric nitrogen to ammonia |
Choose the correct answer from the options given below.
The blue-green algae that take part in nitrogen fixation are also called ______.
Name the cell which is responsible for nitrogen fixation in cyanobacteria.
Name any two nitrifying bacteria in soil.
Consider the following statements. Which of the statements given below is incorect?
Match the following:
| Column A | Column B (Organisms) | ||
| (1) | Symbiotic nitrogen fixation | (a) | Nitrobacter |
| (2) | Denitrification | (b) | Cyanobacteria |
| (3) | Free living nitrogen fixers | (c) | Rhizobium |
| (4) | Nitrification | (d) | Paracoccus |
