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प्रश्न
Which one of the following organisms does not have the ability to fix atmospheric nitrogen?
विकल्प
Nostoc
Ulothrix
Rhizobium
Azotobacter
MCQ
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उत्तर
Ulothrix
Explanation:
- Nostoc, Rhizobium, and Azotobacter are well-known nitrogen-fixing organisms. Nostoc is a cyanobacterium that fixes nitrogen. Rhizobium is a symbiotic nitrogen-fixing bacterium found in legume root nodules. Azotobacter is a free-living nitrogen-fixing bacterium.
- Ulothrix, on the other hand, is a green alga and does not have the ability to fix atmospheric nitrogen.
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