A snake does not have legs. Nevertheless, it has tiny hip-like bones in its midsection where legs could reasonably attach. The bones have no function.
How do the hip bones of a snake provide evidence for the evolution of snakes?
A. The hip bones are vestigial structures that show evolutionary descent from an ancestor that had legs.
B. The hip bones are analogous structures with the leg bones of other animals, and show how they all evolved from a common ancestor.
C. The hip bones are vestigial structures that show that snakes, worms, and other legless animals evolved by adaptive radiation.
D. The hip bones are homologous structures with the vertebrae and other bones of the snake, and show the sequence in which the vertebrate skeleton evolved.
