How does the study of homologous structures, such as the pentadactyl limb in vertebrates, provide evidence for evolution?
It shows how environmental pressures can induce identical, immediate genetic changes in unrelated species.
It demonstrates that these species share a common ancestor from which the basic anatomical plan was inherited.
It proves that organisms occupying similar ecological niches will always develop identical internal structures.
It indicates that structures are perfectly adapted to their function and do not undergo further evolutionary modifications over time.