Question

Animals of class Mammalia have

• A. Seven cervical vertebrae
• B. Seven cranial nerve
• C. Single ventricular chamber
• D. Fourteen cervical vertebrae

Answer 1

The correct option is A Seven cervical vertebrae

Mammals have seven cervical vertebrae and not fourteen cervical vertebrae, a number that remains remarkably constant. Mammals have 12 cranial nerves and not seven and they have two ventricular chambers and not one. Hence, option A is correct.