The Anatomical Record
Homology: organs or body parts for different function but of common evolutionary descend; e.g. front limbs of mammals
Development: Embryology recounts Evolutiontraits and organs of evolutionary ancestors occur during embryo development; e.g. gill slits, bony tail, fur in human embryos
Vestigial structures: remnants of evolutionhave no apparent function in modern species but link to function in evolutionary ancestors; e.g. pelvic bones in whales, vermiform appendix in humans (has important digestive function in rodents)