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NEET Biology NEET PYQ-Cell The Unit Of Life

  • question_answer
    A free living nitrogen-fixing cyan bacterium which can also form symbiotic association with the water fern Azolla is: [AIPMT (S) 2004]

    A) Tolypothrix

    B) Chlorella

    C) Nostoc

    D) Anabaena

    Correct Answer: D

    Solution :

    [D] Anabaena is a free living nitrogen fixing cyanobacterium which can form symbiotic association with water fern Azolla.
    Blood groups Antigen on RBC Antibodies in serum
    A A anti b
    B B anti a
    AB A&B —
    O — anti a & anti b
    Hence, blood group AB has no antibodies in serum.


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