<P> Fish scales are dermally derived , specifically in the mesoderm . This fact distinguishes them from reptile scales paleontologically . Genetically , the same genes involved in tooth and hair development in mammals are also involved in scale development . </P>
<P> Fish scales are dermally derived , specifically in the mesoderm . This fact distinguishes them from reptile scales paleontologically . Genetically , the same genes involved in tooth and hair development in mammals are also involved in scale development . </P>
differences in the scales of fishes and reptiles lies in their being
differences in the scales of fishes and reptiles lies in their being
dermally derived
dermally derived