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Spinal Nerves

Which one of ...

Question

Which one of the following characters is not typical of the class Mammalia?

A

Ten pairs of cranial nerves

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B

Thecodont dentition

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C

Alveolar lungs

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D

Seven cervical vertebrae

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Solution

The correct option is A
Ten pairs of cranial nerves

Twelve pairs of cranial nerves are present in mammals. Thecodont dentition, alveolar lungs and seven cervical vertebrae are typical features of class Mammalia.

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