1. Bacteria

2. Classification unicellular prokaryotes 2 Domains Achaea –Kingdom Archaebacteria (ancient) –found in marshes, swamps, hot sulfur springs, Great Salt Lake, deep ocean vents Bacteria –Kingdom Eubacteria (true) –found in almost any habitat Bacteria

3. Classification Kingdom Archaebacteria cell walls without peptidoglycan (carbohydrate) autotrophic or heterotrophic live anaerobically live in harsh environments (great salt lakes, hot springs) ex: Methanogens (in digestive tract of animals), Halophiles (salt-loving) Bacteria

4. Classification Kingdom Archaebacteria cell walls without peptidoglycan (carbohydrate) Bacteria

5. Classification Kingdom Archaebacteria live in harsh environments (great salt lakes, hot springs) Bacteria

6. Classification Kingdom Eubacteria cell wall contains peptidoglycan (carbohydrate) autotrophic or heterotrophic free living (ponds, streams, on dead organisms) or deadly parasites ex: streptococcus, Escherichia coli, anabaena Bacteria

7. Classification Kingdom Eubacteria ex: streptococcus, Escherichia coli, anabaena Bacteria

8. Cell structure cell wall nucleic acid capsule flagella pili ribosomes plasmid Bacteria

9. Cell structure endospore –tough protein coat formed inside cell; used to survive harsh conditions Bacteria

10. Classifying Bacteria bacteria are classified according to: shape arrangement staining properties Bacteria

11. Classifying Bacteria shape spherical –coccus/cocci rod –bacillus/bacilli spiral –spirillum/spirilli Bacteria

12. Classifying Bacteria arrangement pairs –diplo… clusters –staphlo… chains –strepto… Bacteria

13. Classifying Bacteria arrangement Bacteria

14. Classifying Bacteria staining properties gram stain negative –thin layer of peptidoglycan –stains pink gram stain positive –thick layer of peptidoglycan –stains purple Bacteria

15. Life processes nutrition heterotrophs –parasitic ex: staphylococcus aureus –saprophytic Bacteria

16. Life processes nutrition photosynthetic autotrophs –energy from sunlight –ex: anabaena Bacteria

17. Life processes nutrition chemosynthetic autotrophs –energy from chemicals –ex: Nitrobacteria Bacteria

18. Life processes respiration obligate aerobes –require O 2 to live –ex: tuberculosis obligate anaerobes –can not live in presence of O 2 –ex: botulism facultative anaerobes –lives with or without O 2 –ex: E. Coli Bacteria

19. Life processes reproduction binary fission –split in two (asexual reproduction) Bacteria

20. Life processes reproduction conjugation –transfer of genetic material to an acceptor bacterium –sexual reproduction Bacteria

21. Life processes reproduction spores –buds form and produce new cells –spores can survive a long time before “hatching” Anthrax spores Bacteria

22. Advantages of bacteria human intestine food production- –milk, buttermilk, yogurt, sour cream, cheese ecology –decomposers –nitrogen fixation producers Bacteria

23. Disadvantages of bacteria diseases Bacteria

24. Disadvantages of bacteria diseases most bacteria affect host be producing toxins endotoxin –toxic substance bound to cell wall exotoxin –secreted substance toxic treatment antibiotics –medication used to help kill or assist immune system in destruction of bacteria Bacteria