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This Concept Map has information related to: ben cary, primitive cells first were prokariotic, Origin of life Chapter 20 indicated by micro fossils, chemical evolution requiures chemical building blocks, prokariotic and anarobic, Origin of life Chapter 20 time periods devonian, chemical evolution requiures absence of oxygen, cambrian known as algea bacteria and fungi, Origin of life Chapter 20 formed early cells, Origin of life Chapter 20 formed arobes, Origin of life Chapter 20 assembally with RNA