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

Correct answer: D. Ten pairs of cranial nerves

  • A. Alveolar lungs
  • B. Seven cevical vertebrae
  • C. Thecodont dentition
  • D. Ten pairs of cranial nerves

Explanation

Correct option is D. In higher vertebrates (reptiles, birds, mammals) there are 12 pairs of cranial nerves. Class mammals have; Alveolar lungs. Seven cervical vertebrae. Thecodont dentition. 12 pairs cranial nerves.

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Coordination depends on receptors, neurons, synapses and nerve impulses, with reflex actions traced through the reflex arc and the roles of major brain regions. Chemical coordination covers endocrine glands and hormones, including how hormones regulate growth, metabolism, reproduction and internal balance, unlike rapid nervous control.

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