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Monerans : Bacteria

Monerans : Bacteria. Friend or Foe. Prokaryotes. Bacteria = Prokaryotes Discovered when Robert Hooke and Anton van Leeuwenhoek invented the microscope Bacteria are the smallest living organism Unicellular and lack nucleus. Classifying Prokaryotes. 2 Different Groups: Eubacteria

adrienne-roderick
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Monerans : Bacteria

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  1. Monerans:Bacteria Friend or Foe

  2. Prokaryotes • Bacteria = Prokaryotes • Discovered when Robert Hooke and Anton van Leeuwenhoek invented the microscope • Bacteria are the smallest living organism • Unicellular and lack nucleus

  3. Classifying Prokaryotes • 2 Different Groups: • Eubacteria • Great variety • Live almost anywhere (land, water, & in humans) • Cell wall contains peptidoglycan (carbohydrate) • Archaebacteria • Chemically different because lack peptidoglycan • DNA more like that of eukaryotes • Live in harsh environments (no oxygen, very salty, & high temperatures)

  4. Identifying Prokaryotes • Identified by Shape, Chemicals in Cell Walls, Way they Move, & Obtaining Energy • Shapes: • Bacilli = Rod Shaped • Cocci = Spherical Shaped • Spirilla = Spiral & Cork-screw

  5. Obtaining Energy • Heterotrophs • Chemoheterotrophs = take in organic molecules • Photoheterotrophs = photosynthetic (use sunlight) & need organic molecules for energy • Autotrophs • Chemoautotrophs = make organic molecules from carbon dioxide • Photoautotrophs = use light energy and water to carbon compounds and oxygen (like plants)

  6. Living Conditions • Obligate Aerobes = need oxygen to live • Obligate Anaerobes = needs no oxygen • Falcultative Anaerobes = can live with or without oxygen

  7. Reproduction • Binary fission = cell grows to double its size, DNA copied, and then splits • Conjugation = DNA exchanged by bridge that forms and passes on genes • Endospores = spores formed when in bad conditions to live. Spores are dormant, then awaken when good conditions

  8. Bad Bacteria • Pathogens = disease causing (i.e. E. coli )

  9. Good Bacteria • Vaccines = preparation of weak pathogen • Antibiotics = block the regrowth and reproduction of pathogens • Decomposers = help the ecosystem recycle nutrients • Human Uses: • Clean oil spills because some digest petroleum • Purifying water by removing waste products • Making vitamins • Foods & Drinks to help Human Body digestion

  10. Probiotic Kefir Milk L. casei L. acidophiles L. plantarum L. rhamnosus S. diacetylactis S. florentinus B. bacterium longum Leuconostoc cremoris B. bacterium breve Lowfat Milk Ice Cream Whey Protein Strawberries Ice Bacteria Shakes!!!!

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