prokaryotic cells

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  • Prokaryotic cells
    • few organelles
      • NOT membrane bound
    • contains
      • DNA
        • NOT contained within nucleus
      • ribosomes
      • cell wall
      • flagella
    • first appeared approximately 3.5 billion years ago 
    • extremophiles
      • live in extreme conditions
        • temperature
        • salinity (salt concentration)
        • pH
    • unicellular

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