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  4. The number of bones, in each half of the lower jaw of a mammal, is

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Q. The number of bones, in each half of the lower jaw of a mammal, is

JIPMERJIPMER 2013Locomotion and Movement

Solution:

Lower jaw or mandible of humans on either side consists of a single bone, the dentary. Both dentaries remain united anteriorly at mandibular symphysis. Therefore, mandible is a single bone which consists of two dentary bones (practically two bones but theoretically a single bone).