At approximately 4-5 weeks of embryonic development, all vertebrates have a structure called a pharyngeal pouch. This structure eventually develops into gills in fish and forms structures of the car, jaw, and neck in other vertebrates. The similarity in embryological stages leads us to conclude that these organisms-
Embryos and Evolutionary History
Pharyngeal pouch
Pharyngeal pouch
Fish
Reptile
Bird
Human
are found in the same species
are genetically identical
are unrelated
share a common ancestor