ANTH 1102 Lecture Notes - Lecture 13: Radiocarbon Dating, Carbon-14, Relative Dating
30 Mar 2017
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Document Summary
Over long periods of time environmental isolation with genetic changes that lead to new species. Cant observe reproduction with fossils- cant know if they"re same species through that assign fossils to a taxon (like species) by. Shared traits that different groups have based on shared ancestor or shared adaptation. Shared traits that different groups have not based on shared ancestor or shared adaptation. Two ways to give fossils and speciation dates. Molecular mtdna dating- when species diverged from each other. Used when we don"t have access to dna. From solar radiation, neutrons are excited and they hit hydrogen atom, knocks off proton, turns to carbon 14. Plants are taking in carbon dioxide and carbon 14 while alive. Animals eat the plants/ other animals that ate the plants. When you die, stop taking in carbon 14, so it keeps trying to go back to being stable as nitrogen 14.
