Sources of Evolution Fossil Record: 1) Evidence from the fossil record: Fossils found in ________ ________ of rock are much more similar to species _____ ______ than fossils of older rock Fossils appear in ___________ order in the rock layers. _________ are found in _______ rock. Not all organisms appear in the fossil record at the same time. I.e. the fossil history of vertebrates show that ____ are the ________ followed by _________ than _______ than ________ suggesting that amphibians evolved from fish. 2) Evidence from Transitional fossils: 3) Evidence from Biogeography: ______________ _______ environments are more likely to be populated by related species Animals found on _______ closely resemble animals found on the closest continent Fossils of the _____ species can be found on the coastline of neighboring continents Closest related species are almost never found in exactly the same location or habitat. 4) Evidence from Anatomy: Homologous structures: Analogous structures: Vestigial structure: (i.e. human appendix and tailbone) (wings of bird vs. wing of fly) 5) Evidence from Embryology: Study of early pre-birth stages suggest similarities among species (fish, chicken, human, pig) 6) Evidence from DNA: Scientists can determine _________ similarity and _________ by looking at and ________ DNA. They can also see how traits are passed down and how the genes for the traits could change by mutation.