2.2 Comparing bacteria and archaea

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4 Terms

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Bacteria and archaea

  • first form of life on earth

  • most abundant organisms on earth

  • smallest and simplest life forms

  • both shaped like spheres, rods, and spiral

2
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Bacterias habitats

  • Anaerobic - found in human guts

  • Mesophiles less extreme environments majority of bacteria

  • extremophiles possible but rare

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Archaea habitats

methanogenic - found in landfill sites, cattle guts, swamps

Extremophiles - very extreme environments deep sea vents and hot springs

mesophiles possible but rare

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Reproduction of both Archaea and bacteria

  • Both reproduce asexually

  • A cell grows, and a single chromosome is copied

  • When it reaches an optimal size, it separates into 2 identical cells

  • can reproduce in 15-20 min