Are there vertebrae in most joints in the body

The image shows the evolution of a species of fish. a few fish from a population developed different social behaviors and evolved into different species. two fish according to the image, the fish underwent . the new species of fish had mating seasons that were different from that of the original fish. because of the differences in mating seasons, the fish underwent reproductive isolation. this mode of isolation would be .

What are the proteins in connectivity tissues of your foot examples of?

Which structure in the cardiovascular system connect arteries to veins?