according to embryology, why do fish and birds have a common ancestor?; pelvic bones in whales are an example of structures.; which is an example of using comparative anatomy to study evolutionary relationships?; which traits do human embryos have that link them to a common ancestor with fish and reptiles?; which are accurate descriptions of comparative anatomy? select three options.; what does the diagram suggest about the evolutionary relationship between these two mammals?; the diagram shows a chicken embryo and a human embryo.; evidence for evolution reveals that closely related organisms have many characteristics.