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Evidence that supports evolution
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Evidence 1: Biogeography
Some organisms tend to be SIMILAR but different in geographically separate areas Ex: zebra in Africa and horses in Mongolia This is due to having a COMMON ancestor but then “evolving” once they were isolated (Gondwanaland)
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Evidence 2: The Fossil Record
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Caste
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Moulds
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Frozen relics Mammoth calf
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Organisms preserved in amber
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Organisms preserved in tar pits
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Bone and teeth replaced with stone
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How fossils form
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Evidence 3: Comparative Anatomy
By looking at the structures found in different species of animal, we can see evidence of a COMMON ORIGIN… Ex: Wings of a bird and wings of a bat; bones in the hand of a human and bones in the flipper of a whale
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Homologous (same) structures
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Analogous (different) structures
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Vestigial (not used) organs
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Evidence 4: Comparative embryology
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Evidence 5: Molecular Biology
Every living thing uses DNA Some amino acids are THE SAME between species We are just 2 amino acids difference to a gorilla!
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Evidence 6: Domestication
We have SELECTED specific traits over generations to turn: A wolf into a poodle! A crabapple into a “granny smith” We select traits and breed plants and animals for specific purposes and “change” it over time
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