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all of the fossils that have been discovererd / scientist can learn about the history of the Earth
New VS. Old
-fossils found in new layers of Earths crust tend to have physcial or molecular similarties to present day orgnaisms
-older fossils are less similar to present day organisms
Evidence To Evolution
-modern spieces and extincit species share and ancetsor
Common Ancetsor- most recent specie in which 2 different species have evolved
* structual DNA supports this theory
* fossils give evidence
* DNA/ hypothesis
*transtional character of extinct species to see how changes happened
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