Bird vertebrae are:
Correct answer: B. Heterocoelous
- A. Acoelous
- B. Heterocoelous
- C. Amphicoelous
- D. Procoelous
Explanation
Bird vertebrae are heterocoelous, i.e. the centra of the vertebrae have saddle shaped ends. Acoelous refers to vertebrae that are flat on both ends (mammals). Amphicoelous means both ends of the centrum are concave (fish). Procoelous means concave in front and convex in back (anurans and reptiles).
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