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Bacteria Presentation

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  • Hi, archae are not bacteria at all. The name archaebacteria is old and mistaken. Archae (as bacteria) are prokaryotes (unicellular without nucleus), but they are very different from bacteria and constitute the third branch of the three of life.
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Bacteria Presentation

  1. 1. Bacteria!
  2. 2. The Bacteria Cell <ul><li>Bacteria are EVERYWHERE! </li></ul><ul><li>And most bacteria are either harmless or helpful… </li></ul><ul><li>Bacteria are prokaryotic – </li></ul><ul><li>… which means…? </li></ul><ul><li>Prokaryotic cells can accomplish all the tasks necessary for life. </li></ul>
  3. 3. Bacteria Shapes <ul><li>Bacteria come in 3 different shapes: </li></ul><ul><ul><li>Spherical </li></ul></ul><ul><ul><li>Rod-like </li></ul></ul><ul><ul><li>Spiral </li></ul></ul>
  4. 4. Bacteria Structure <ul><li>Bacteria are cells, too. </li></ul><ul><li>They have: </li></ul><ul><li>A cell wall </li></ul><ul><li>A cell membrane </li></ul><ul><li>Cytoplasm </li></ul><ul><li>Genetic Material </li></ul><ul><li>Flagella/Cilia </li></ul><ul><li>They don’t have: </li></ul><ul><li>A nucleus…remember, they are prokaryotic </li></ul>
  5. 5. Two Kingdoms of Bacteria <ul><li>Archaebacteria </li></ul><ul><li>These are ancient bacteria </li></ul><ul><li>They exist in extreme environments </li></ul><ul><li>They are anaerobic </li></ul><ul><li>Eubacteria </li></ul><ul><li>Live everywhere that archaebacteria don’t </li></ul><ul><li>(like on and in you!) </li></ul><ul><li>Some are autotrophic and some are heterotrophic </li></ul>San Francisco Bay Salt Ponds A variety of eubacteria
  6. 6. Bacteria Reproduction <ul><li>Asexual Reproduction </li></ul><ul><li>Binary Fission </li></ul><ul><li>Bacteria make exact copies of each other </li></ul><ul><li>This makes more of the same </li></ul><ul><li>Sexual Reproduction </li></ul><ul><li>Conjugation </li></ul><ul><li>Bacteria combine their genetic material </li></ul><ul><li>This creates variety in bacteria – but not more </li></ul>
  7. 7. Survival Needs <ul><li>Obtaining Food </li></ul><ul><ul><li>Autotrophic/Photosynthesizing </li></ul></ul><ul><ul><li>Heterotrophic </li></ul></ul><ul><li>Respiration </li></ul><ul><ul><li>Some need O 2 , some don’t </li></ul></ul><ul><li>Endospore Formation </li></ul><ul><ul><li>For survival in harsh conditions </li></ul></ul>
  8. 8. Bacteria and the Living World (most bacteria are harmless or helpful) <ul><li>Fuel </li></ul><ul><li>Methane is a gas produced by archaebacteria during respiration </li></ul><ul><li>Food </li></ul><ul><li>Do you like?: </li></ul><ul><ul><li>Cheese </li></ul></ul><ul><ul><li>Yogurt </li></ul></ul><ul><ul><li>Apple Cider </li></ul></ul><ul><ul><li>Olives </li></ul></ul><ul><ul><li>Sauerkraut </li></ul></ul><ul><ul><li>Pickles </li></ul></ul><ul><ul><li>Buttermilk </li></ul></ul><ul><ul><li>Sour Cream </li></ul></ul><ul><ul><li>Then you like bacteria! </li></ul></ul>Methane gas power generator
  9. 9. Bacteria and the Living World <ul><li>Natural Recycling </li></ul><ul><li>Bacteria are Decomposers </li></ul><ul><li>They also convert nitrogen gas in the air into nitrogen that plants need to grow. </li></ul><ul><li>Clean-up </li></ul><ul><li>Bacteria are used to clean up: </li></ul><ul><ul><li>Oil-spills </li></ul></ul><ul><ul><li>Gasoline leaks </li></ul></ul>Health and Medicine <ul><li>They can keep you healthy! </li></ul><ul><ul><li>- They help make insulin </li></ul></ul><ul><ul><li>- Help digestion </li></ul></ul><ul><ul><li>- Make vitamins </li></ul></ul>

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