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    Question

    Free floating fresh water fern

    is:
    A Anabaena Correct Answer Incorrect Answer
    B Azolla Correct Answer Incorrect Answer
    C Azospirillum Correct Answer Incorrect Answer
    D None of these Correct Answer Incorrect Answer

    Solution

    Azolla and Salvinia are the two examples of the aquatic plants. These are the free floating ferns.

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