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NEET Biology Biological Classification And System Of Classification / जैविक वर्गीकरण और वर्गीकरण की प्रणाली Question Bank Economic Importance of Bacteria

  • question_answer
    Which of the following is free-living aerobic non- photosynthetic nitrogen fixing bacterium [CBSE PMT 1997; BHU 2003]

    A)            Rhizobium                               

    B)            Azotobacter

    C)            Nostoc                                      

    D)            Azospirillum

    Correct Answer: B

    Solution :

     


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