Case in point – The Reptile to Mammal series – the Ear
Humans (and all mammals) have a 3-bone ear structure where three tiny bones link in a line between the ear drum and nerve system. Reptiles on the other hand, have a single bone making the same connection. An attractive feature designed so we can speak, eat, move and listen all at the same time through articulated joints. For evolution to accomplish this feat it would involve concordant DNA code addition of the three tiny bones, the cartilage that holds them in line, auditory nerve changes, muscles, cartilage, jaw structures, blood vessels and the like with no plan, and according to evolution - by thousands of accidentally coordinated mutations over millions of years!