Question

    Which of the following anaerobic microorganism fixes atmospheric nitrogen symbiotically

    A Azotobacter Correct Answer Incorrect Answer
    B Clostridium Correct Answer Incorrect Answer
    C Rhizospirrilum Correct Answer Incorrect Answer
    D Rhizobium Correct Answer Incorrect Answer

    Solution

    Rhizobium is a genus of Gram-negative soil bacteria that fix nitrogen symbiotically. 

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