Evidence of Evolution

Master evolution evidence: homologous, analogous, vestigial structures, DNA, embryology!

Evidence for Evolution Match the piece of evidence with the most appropriate description. Homologous Structures Same structure, different function due to unique environments Analogous Structures Different structure, same function due to similar environments Vestigial Structures Body structure in a present day organism that no longer serves its original purpose DNA Used to determine how genetically related two species are Embryology Similarities in early stages of development Fossils Remains of ancient life that have preserved Sort the following examples into the different kinds of evidence for evolution. Analogous Structures A bat wing and a butterfly wing are both used for flight, but butterflies do not have bones. An anteater tongue and butterfly proboscis are both used to get into tight spots and obtain food. Homologous Structures A human and a cat have almost identical radius and ulna bones. All forelimbs of vertebrates have the same pattern of bones. DNA Evidence Humans, cows, chickens, and chimpanzees all have a gene that encodes the hormone insulin. There is a 1% difference between chimpanzees and humans. Embryological Evidence A lizard, turtle, pig, and human all look almost identical in the early stages of development. All vertebrate embryos (including humans) have gill slits and a tail during early development. Vestigial Structures Whales have pelvic bones that do not attach to legs. The appendix of humans, the eyes of a blind mole rat, and the underdeveloped hind legs found in some snakes.