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Prokaryote Classification

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  • 1. Prokaryote Classification
  • 2. Domains Bacteria and Archaea
    • Classified by Shape
      • Cocci
      • Bacilli
      • Spirilla
  • 3. Domains Bacteria and Archaea
    • Classified by Shape
      • Vibrio
      • Spirochete
  • 4. Domains Bacteria and Archaea
    • Classified by Configuration
      • Pairs
      • Chains
      • Clusters
  • 5.  
  • 6. Domains Bacteria and Archaea
    • Gram Stain
      • Developed by Hans Christian Gram in 1884
      • Still used in laboratories as a “first step” in diagnostics
  • 7. Domains Bacteria and Archaea
    • Gram negative
      • Pink
      • Tend to be more pathogenic (disease causing)
      • Have a thinner cell wall
    • Gram positive
      • Purple
      • Have a thicker cell wall
  • 8. Reproduction of Prokaryotes
    • Binary fission
      • The DNA replicates and attaches to cell membrane.
      • The cell grows.
      • The DNA copies separate, cell grows larger.
      • The cell splits into two daughter cells.
  • 9.  
  • 10. Reproduction of Prokaryotes
    • Endospores
      • A thick, protective membrane formed when conditions are bad.
      • Can survive boiling, freezing, drought, etc
      • Will grow when conditions are favorable.
  • 11. Prokaryotes in the Ecosystem
    • Nitrogen Fixation
    • Recycling Nutrients
    • Cleaning up Pollution
    • Production of Medicines
    • Production of Food Products
    • Digestion of Food for Animals
    • Pathogenic Bacteria
  • 12. Nitrogen Fixation
    • All eukaryotes need nitrogen for basic cellular function.
    • Nitrogen is a major component of proteins and DNA.
    • Bacteria take nitrogen out of the air and convert it to a form plants can use.
  • 13.  
  • 14. Recycling Nutrients
    • Decay is caused by bacteria and fungi.
    • Organic matter is recycled into original elements by bacteria.
    • Composted material important garden component
  • 15. Cleaning up Pollution
    • BIOREMEDIATION uses living things to change polluting chemicals into less harmful chemicals.
      • Mine tailings
      • Oil spills
      • Agricultural Waste
      • Municipal Waste
  • 16. Production of Medicines
    • Genetically modified bacteria produce:
      • Antibiotics
      • Insulin
      • Anti-cancer drugs
  • 17. Dangerous Bacteria
    • PATHOGENIC bacteria cause diseases.
    • These bacteria attack:
      • Animals
      • Plants
      • Protists
      • Fungi
      • Other bacteria!