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

Alveolar lungs

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Ten pairs of cranial nerves

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Seven cervical vertebrae

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Thecodont dentition

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Solution

The correct option is B Ten pairs of cranial nerves
In higher vertebrates (reptiles, birds, mammals) there are 12 pairs of cranial nerves
Alveolar lungs, seven cervical vertebrae, and thecodont dentition are typical of class Mammalia.

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