Question

Which one of the following characters is not typical
of the class Mammalia?
(a) Thecodont dentition
(b) Alveolar lungs
(c) Ten pairs of cranial nerves
(d) Seven cervical vertebrae

Answer 1

Answer:

Mammals have some key characteristic features like four-chambered hearts, seven cervical vertebrae, muscular diaphragm, mammary gland, placenta, 12 pairs of cranial nerves and lungs with alveoli. Mammals have thecodont teeth meaning the teeth fits in a socket in the jawbone.

So, the correct answer is (c)

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