What does the similarity of vertebrate limbs suggest about how the different classes of vertebrates evovled?

Answer 1

It suggests that the invertebrate classes have a common origin. Because the limbs are not outwardly similar in structure or function today, these are examples of homologous structures.

Answer 2

The five classes of vertebrates, Fish, Amphibians, Reptiles, Birds and Mammals all share some basic similarities in their limbs: Fish fins and the limbs of the tetrapods all start proximally with a single bone (humerus) joined to two more bones (radius & ulna) then divide further into multiple wrist bones (carpal bones) and finally the phalanges at the distal end of the limb.

This points to the idea that all five classes came from a common ancestor that shared this basis limb/fin structure.

Answer 3

I don't believe in evolution.