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Mammalia

Which is not ...

Question

Which is not a characteristic feature of mammals ?

A

Diphyodont teeth

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B

Ten pairs of carnial nerves

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C

Seven cervical vertebrae

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D

Left aortic arch in the circulatory system

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Solution

The correct option is C Ten pairs of carnial nerves
Characteristics of Mammals are:
1. Diphyodont teeth (most mammals).
2. Seven cervical vertebrae (except manatees and sloths).
3. Left systematic arch in the circulatory system.
4. Twelve pairs of cranial nerves.
So the correct answer is option 'A'.

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