1 / 33

Bacteria

Bacteria. VERY SMALL Tip of sewing needle covered in bacteria. Bacteria. Found everywhere there is water Plaque on tooth with toothbrush bristles . Diversity of Prokaryotes. Bacteria are prokaryotes Prokaryotes make up two domains Bacteria (eubacteria) Archaea (archaebacteria).

ursula-norman
Télécharger la présentation

Bacteria

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Bacteria

  2. VERY SMALL Tip of sewing needle covered in bacteria

  3. Bacteria • Found everywhere there is water Plaque on tooth with toothbrush bristles

  4. Diversity of Prokaryotes • Bacteria are prokaryotes • Prokaryotes make up two domains • Bacteria (eubacteria) • Archaea (archaebacteria). Staphylococcus bacteria on hair follicle

  5. Archeabacteria • “ancient” bacteria • Unique cell walls and ribosomes • most live in harsh environments Salty shallow tide pools Deep sea vents Hot springs

  6. Eubacteria • "true" bacteria • largest kingdom • have cell wall, some with flagella • many live in soil or water • some cause disease, decomposition • some are photosynthetic Salmonella invading human cells

  7. Photosynthetic Eubacteria Cyanobacteria (blue green algea)

  8. Structure E. coli

  9. Identifying Prokaryotes Spherical shape = Cocci

  10. Identifying Prokaryotes Rod-shaped = Bacilli

  11. Identifying Prokaryotes Spiral shape = Spirochetes http://www.youtube.com/watch?v=i7BV4IOVKyg&feature=related

  12. Cell Walls

  13. Cell Walls Gram Negative Gram Positive

  14. Movement Flagella help prokaryotes to move toward materials that they need to survive.

  15. http://www.youtube.com/watch?v=J6akNYlkehY&feature=related bacteria re-cap • http://www.youtube.com/watch?v=tqOVYpkZ0qs bacteria song • http://www.youtube.com/watch?v=JnlULOjUhSQ&feature=related white blood cell chase

  16. Arrangement Diplo: in pairs (diplococcus) Diplococcus pneumoniae

  17. Arrangement Diplo: in pairs (diplococcus) Bacillus anthracis

  18. Arrangement Strepto: in long chains Streptococcus pyogenes

  19. Arrangement Staphylo - in clusters Staphylococcus aureus

  20. Metabolism of Prokaryotes Autotrophs • self-feeders Photosynthetic • Light energy Chemosynthetic • obtain energy from hydrogen gas, hydrogen sulfide, or ammonia

  21. Heterotrophs • “Feed off of others” • Saprophytes • Feeds off dead things (decomposers) • Parasites • Feed off living things (cause disease)

  22. Heterotrophs Leprosy

  23. Clostridium botulinum “Botulism” WHAT?!?!

  24. Respiration • Aerobes – require oxygen • Anaerobes – Don’t need oxygen Flesh eating bacteria Tetanus

  25. Reproduction and Growth • Under optimum conditions – divide ever 20 minutes • Binary Fission • Asexual reproduction • Simple Cell Division

  26. Conjugation Two cells exchange DNA through a protein bridge Donor Recipient E.coli

  27. Endospores Dormant state that helps bacteria survive unfavorable conditions Clostridium botulinum

  28. Importance of Bacteria • Benefits to humans • Food Processing • dairy products (cheese, cream cheese, yogurt, etc.) • pickles, sauerkraut, vinegar

  29. Sewage Treatment Plant Bacteria break down waste

  30. Sewage Treatment Plant Bacteria break down waste

  31. Medicine Used to make antibiotics, insulin, other products Bacillus colony Inhibition of fungal growth

More Related