Question

Pygostyle is complex formed by fusion of

• A. Thoracic and lumbar vertebrae
• B. Tail vertebrae
• C. Skull bones
• D. All of the above

Answer 1

The correct option is B Tail vertebrae

A) The thoracic and lumbar vertebrae are not involved in the formation of pygostyle.

B) Pygostyle is a triangular plate formed of the fused caudal (tail) vertebrae, typically supporting the tail feathers in birds.

C) The skull of birds consists of five major bones: the frontal (top of head), parietal (back of the head), premaxillary and nasal (top beak), and the mandible (bottom beak).
D) Pygostyle is formed by the fusion of the tail vertebrae.
So the correct answer is 'Tail vertebrae'.