How does embryonic development relate to evolutionary theory?

Embryonic development is a crucial aspect of evolutionary theory because it provides significant evidence for common ancestry among closely related species. During the early stages of development, embryos of different species often exhibit striking similarities in their structures and processes. For instance, many vertebrate embryos share features such as pharyngeal arches and tail structures, which are indicative of a shared lineage.

These embryonic similarities suggest that these species have evolved from a common ancestor. As development progresses, the embryos diverge, leading to the distinctive characteristics of each species. This concept supports the idea of evolutionary change, where small modifications occur over time within a lineage, influenced by various evolutionary pressures. Consequently, the study of embryonic development reveals patterns that are consistent with the branching tree of life, reinforcing the understanding of how species are interconnected through evolution.