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Posterior caudal vertebrae in birds are fused into a __________ that helps support the tail feathers.

1 Answer

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Final answer:

Birds have a fused structure called a pygostyle that supports their tail feathers. It is formed by the fusion of the posterior caudal vertebrae.

Step-by-step explanation:

Birds have a fused structure called a pygostyle that supports their tail feathers. The pygostyle is formed by the fusion of the posterior caudal vertebrae. It plays a crucial role in providing stability and support to the bird's tail feathers during flight.

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