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JAMB Biology 1991 Question 31

Question 31

Support and Movement

Which of the following vertebrae lacks a centrum?

  1. A.Atlas
  2. B.Axis
  3. C.Thoracic
  4. D.Lumbar
Show the answer and explanation

Answer: A (Atlas)

Explanation

The atlas is a ring of bone with no centrum; its centrum has joined the axis to form the odontoid process.