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This Concept Map has information related to: Shayna Grant Ch. 20, 4 needs are time, Hypothosises are prebiotic broth, time periods are silurion, macromolecules assembled by protobionts, Era's 2ND Palieozoic, time periods are triossic, Mesozoic gave rise to dinosaurs, time periods are permion, Chapter 20 different Era's, Chemical evolution there is 4 needs