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*Growth and Reproduction

*Growth and Reproduction. *Some bacteria can divide every 20 minutes If there were unlimited resources, 1 bacteria could grow into a mass 4000 times the mass of earth in just 48 hours!!!. Bacteria. What is the role of bacteria in our world? List everything you know. Bacteria. Are living:.

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*Growth and Reproduction

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  1. *Growth and Reproduction • *Some bacteria can divide every 20 minutes • If there were unlimited resources, 1 bacteria could grow into a mass 4000 times the mass of earth in just 48 hours!!!

  2. Bacteria What is the role of bacteria in our world? List everything you know

  3. Bacteria Are living: • Made up of cells • Have DNA • Grow and develop • Use energy • Homeostasis • Reproduction

  4. B SMART

  5. 1) Binary Fission • Binary Fission: • Asexual reproduction where organism replicates DNA and divides in half • Produces two identical daughter cells

  6. Reproduction Binary fission

  7. 2) Conjugation • Conjugation: (“bacterial sex”) • Sexual reproduction where organism exchange genetic information

  8. B SMART Come back!!!!!

  9. Shapes S Cocci Bacilla Spirilla

  10. Shapes S S S Streptococus Streptobacilla Streptospirilla S S S S S S S Staphlococus Staphlobacilla Staphlospirilla

  11. Some are BAD and make us ill

  12. Streptococcus Strep throat Pnemonia

  13. Tetanus (lock jaw) Affects nervous system E. coli Some in our intestines … others are pathogens that can cause kidney failure

  14. Bacteria Can be bad … but can be good intestines Feel better with?? decomposers antibiotics

  15. Importance of Bacteria

  16. Decomposers • Break down things into simpler materials and release into the soil • *Help breakdown sewage treatment water

  17. Nitrogen Fixers • Converting nitrogen gas into a form plants can use • Allows nitrogen to cycle through biosphere

  18. Other Uses • E. coli in our intestines • Make vitamins that we cannot make • Oil digestion

  19. Archaebacteria!

  20. Archaea • Lack peptidoglycan walls and have different membrane lipids than Eubacteria • DNA sequences are closer to Eukaryotes than Bacteria

  21. Extremophiles • Extremophiles: • Live in extreme environments!

  22. Halophilic: salt loving

  23. Thermophilic: heat loving

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