32. Vertebrates
Chordates
32. Vertebrates Chordates
4PRACTICE PROBLEM
Wide shreds of evidence from fossils and developing embryos suggests that the mammal's ear bones were once jawbones. If they truly were, what is the advantage of having the jawbones and earbones separated like the modern mammals have?
Wide shreds of evidence from fossils and developing embryos suggests that the mammal's ear bones were once jawbones. If they truly were, what is the advantage of having the jawbones and earbones separated like the modern mammals have?