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SSC General Science & Technology Sample Paper NCERT Sample Paper-7

  • question_answer
    Which of the following is found in rice field?

    A)  Azolla

    B)         Rhizobium

    C)  Anihoceros       

    D)  Rhodospirillum

    Correct Answer: A

    Solution :

    [a] Azollapinnatais an aquatic pteridophyte. It shows symbiotic association with nitrogen fixing blue-green algae. If it is grown in the rice field, it increases the production of rice by 50 %.


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