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Q. Bird vertebrae are

AIPMTAIPMT 1988Animal Kingdom

Solution:

Bird vertebrae are heterocoelous i.e., the centra of 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).