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Write short notes on the following featu...

Write short notes on the following features of the eutherians.
(a) Dentition, (b) Endoskeletion.

Text Solution

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a. Dentition : The Dental formula of eutherians is i 3/3, c 1/1j pm 4/4, m 3/3, dentition is the codont, heterodont, diphyodont.
b. Endoskeleton : Skull is dycondylic. Most mammals have seven cervical vertebra, vertebae are of the amphiplatyan type, sacral vertebrae are two or five, ribs are double-headed.
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