They provide evidence of life evolving through natural selection. Fossilized bones, teeth, shells or even entire organisms can paint a picture of life from long ago, giving us clues about organisms that are long extinct.Scientists compare the anatomy, embryos, and DNA of living things to understand how they evolved. Evidence for evolution is provided by homologous structures. These are structures shared by related organisms that were inherited from a common ancestor. Other evidence for evolution is provided by analogous structures.
