WB JEE Medical WB JEE Medical Solved Paper-2015

  • question_answer 154) Which one of the followings is not a characteristic feature of mammals?

    A)  Diphyodont tooth

    B)  Ten pairs of cranial nerves

    C)  Seven cervical vertebrae

    D)  Left aortic arch in the circulatory system

    Correct Answer: B

    Solution :

     In higher vertebrates (reptiles, birds, mammals) there are 12 pairs of cranial nerves. These are Olfactory (1) Optic (2) Oculomotor (3) Trochlear(4) Trigeminal (5) Abducent (6) Facial (7) Vestibulocochlear (8) Glossopharyngeal (9) Vagus (10) Accessory (11) and Hypoglossal (12)

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