Evolution Of Prokaryotes

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Evolution Of Prokaryotes
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Different Types Of Prokaryotes
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Prokaryotes Vs. Eukaryotes
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Bacteria
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Bacteria
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Archeabacteria (Halophiles)
Great Salt Lake (Utah)
Owens Lake (California)
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Archaebacteria (Thermophiles) In Yellowstone
National Park
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Archaebacteria (Thermophiles) In Yellowstone
National Park
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Deep Sea Vents
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Deep Sea Vents
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Bacteria Shape
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Bacteria Shape (Cocci)
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Bacteria Shape (Spirilla)
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Gram Staining
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Gram Staining
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Gram-Positive Bacteria
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Gram-Negative Bacteria
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Gram-Positive Gram-Negative Bacteria
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Genetic Recombination

• Transformation
• Conjugation
• Transduction

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Transformation

• A bacterial cell takes in DNA from its external
  environment
• The new DNA is then substituted in the chromosome
  of the bacterial cell

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Conjugation
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Conjugation
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Conjugation
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Transduction

• DNA transfer by a bacteriophage (virus)

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Transformation
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Conjugation
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Transduction
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How Are Bacteria Helpful?

• Sewage treatment
• Break down the remains of plant and animal waste,
  recycling carbon and nitrogen
• Decomposers
• Recycle compounds from dead organisms
• Producing and processing food
• Bacteria ferment the lactose in milk to produce
  buttermilk, sour cream, and yogurt
• Bacteria digest the protein in milk to produce
  unripened cheeses (cottage cheese, ricotta)
• Bacteria digest certain carbohydrates in foods to
  ferment sauerkraut and pickles
• Ferment beer and wine
• Nitrogen fixation
• Useful in mining minerals and petroleum
• Clean up environmental disasters (oil spills)

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Bacteria