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This Concept Map has information related to: CHP 20 Ben Saari, Paleozoic ???? Permian, Paleozoic ???? Devonian, formed on sea floors in deepsea vents, Origins of life 1st eon Archean, Ordovician ???? 488-444, Paleozoic ???? Ordovician, Permian ???? 299-251, First organisms probably heterotropic, Prebiotic Birth Hypothosis the organisms formed on surface, Origins of life requirements for life Source of energy