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 Shows gradual change over time  Simpler = older and deeper in the rocks

 Give an actual glimpse of the past  Direct evidence as to what existed before  history of incremental development from one species to another  Evidence for common descent & common ancestry

 The remains of a dead organism, usually found in rocks  Can be bones,casts, footprints, burrows, or whole bodies trapped in amber (insects trapped in fossilized tree sap  When formed in rock, minerals fill the pores and crystallize  Hard tissues fossilize better than soft

 Similar sequences indicate how closely related organisms are to one another

 Cytochrome c, a protein needed for cellular respiration, is found in all living things Number of DNA base differences out of about 300

 Similar structures with different functions  Suggest common ancestry

 Structures that exist but appear to have no function  Suggest common ancestor with functioning versions of those structures

 Similar looking embryos suggest common ancestry

 Similar behaviors suggest common ancestry  Ex. Head movements of all waterfowl

Forces organisms to adapt, or go extinct Explains why you find fossils of sea creatures in a place that’s now a prairie manitoba/story/2010/07/16/mb- ancient-fish-fossil-manitoba.html mosasaur-fossils-found-in_n_ html

 The existence of similar species on separate continents supports continental drift theory  AKA Paleogeography