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(fossil, extintion the death of every member of a species the dodo bird …
fossil
index fossil
fossil evidence mesosauls fossil found in south America and Africa show that the continent were once joined
fossil record the solidified remains or imprints of once living organisms. Commonly found in sedimentary rock
homologous structures different functions, same anatomy, same ancestors
analogous structures same functions different anatomy different ancestors
extintion the death of every member of a species the dodo bird
mass extinction the death of every member of a species Example : the dodo bird
many spices die out at the same time. Example the
dinosaurs
geologic time scale divides earth 4.6 billion-year history into manageable parts
uniformitarianism the same geologic process that changes earth today have been at work in the past. Large cumulative usually take a very long time Example : Earthquakes
catastrophism The Principal of geologic change ouures suddenly. cataturuphisam event are often unpridictable
plate tectonics the theory that explanes the plate mave around earth surface
superposition principle that states that younger rocks lie above older rocks undisturbed rock layers
effect of continental drift the Panama land bridge formed3 Millon years ago joing north and south America amadilos moved from south to north America
convertible currents move earth tectonic plates
species organisam that share the same characteristics and adaptation can mate with one another produce ferrile offspring
evolution the process by which populations slowly change overtime new species desic an from older species
embryo evidence most embryos look similar in their early stages. Embryos of organisms that have a closer genetic relationship to one another tend to look similar
comparing organisms scientists compare organisms anatomy and DNA to support the theory that species share common ancestors
relative dating