Evo-devo, short for evolutionary developmental biology, is a field of study that explores the relationship between evolution and development. It examines how changes in the developmental processes of organisms can lead to evolutionary changes over time. By understanding how genes control development, scientists can gain insights into how new traits and species arise. Researchers in evo-devo often study model organisms, such as fruit flies and zebrafish, to uncover the genetic and molecular mechanisms behind development. This approach helps explain the diversity of life forms and how evolutionary pressures shape the development of organisms throughout their lifecycles.