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6) Complete the illustration below by filling in with numbers 2 to 6 respectively.
_Ultraviolet radiation, lightning, and lack of oxygen create organic molecules (proteins and DNA) from inorganic molecules.
_Mutation enables cell to perform photosynthesis. Oxygen enters the atmosphere and protocells die off.
_Protocell is formed with borders like cell membranes.
_Heterotrophic prokaryotic cell is formed.
_Primordial seas
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