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    Question

    Which of the following is the algal symbiotic of Azolla

    responsible for biological N fixation?
    A Azotobacter Correct Answer Incorrect Answer
    B Azospirillum Correct Answer Incorrect Answer
    C Anabaena Correct Answer Incorrect Answer
    D None of the above Correct Answer Incorrect Answer

    Solution

    Anabaena and azolla are in symbiosis and do biological nitrogen fixation in rice crop.

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