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प्रश्न
Blue green algae fix _________ directly from air to enhance fertility of soil.
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उत्तर
Blue green algae fix atmospheric nitrogen directly from air to enhance fertility of soil.
Explanation:
Plants and animals cannot take atmospheric nitrogen directly. Certain bacteria and blue-green algae present in the soil fix nitrogen from the atmosphere and convert it into compounds. Once nitrogen is converted into these usable compounds, it can be utilised by plants from the soil through their root systems.
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संबंधित प्रश्न
Define chemoautotrophs.
Describe nitrogen cycle.
Very Short Answer Question:
Name the bacteria responsible for conversion of nitrite to nitrate.
Match the following.
| Microorganism | Role Played |
| Nitrosomonas | Nitrogen fixation |
| Azotobacter | Ammonification |
| Pseudomonas species | Nitrification |
| Putrefying bacteria | Denitrification |
How do human activities affect nitrogen cycle?
The process of nitrogen-fixation by bacteria does not take place in the presence of
Suggest a suitable word for the following statement.
Agent which spreads pathogens from one place to another
Free-living soil bacteria such as Pseudomonas sp. are responsible for the ______ process in the nitrogen cycle.
What is nitrification?
Which of the following statement is incorrect with regard to combustion?
