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  3. NEET

NEET AIPMT SOLVED PAPER SCREENING 2004

  • question_answer
    A free living nitrogen-fixing cyan bacterium which can also form symbiotic association with the water fern Azolla is:                                                                                                                                                               

    A) Tolypothrix        

    B) Chlorella                             

    C)  Nostoc                

    D)  Anabaena

    Correct Answer: D

    Solution :

                    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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