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NEET Biology NEET PYQ-Kingdom Plantae

  • question_answer
    A water fem which is used as a green manure in rice fields is:                                   [AIPMT 2000]

    A) Salvinia

    B) Mucor

    C) Aspergillus

    D) Azolla

    Correct Answer: D

    Solution :

    [d] Singh (1977) has reported the use of Azolla as a precious green compost for rice c.ultivation. The leaves of   Azolla (water fern) contain upto 80,000 Anabaena which fix atmospheric nitrogen and make it available to Azolla which, in turn, makes it available to soil on decomposition.


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