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
Option C Mammals have twelve pair of cranial nerves. Ten pairs of cranial nerves are present in fish and amphibians. Reptiles and birds also have 12 pairs of cranial nerves.
