18.4 Bacteria and Archaea Bacteria are living single-celled prokaryotes.

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KEY CONCEPT Bacteria and archaea are both single-celled prokaryotes.

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Presentation transcript:

18.4 Bacteria and Archaea Bacteria are living single-celled prokaryotes.

18.4 Bacteria and Archaea Bacteria Shapes –rod-shaped Lactobacilli: rod-shapedSpirochaeta: spiral Spirochaeta: Spiral Enterococci: spherical – spiral – spherical

18.4 Bacteria and Archaea Bacteria Structures flagellum pili cell wall DNA plasma membrance –flagellum –pili –DNA –cytoplasm –ribosomes

18.4 Bacteria and Archaea Bacteria reproduce asexually through binary fission.

18.4 Bacteria and Archaea Bacterial Diseases Lyme Disease – Ticks Tetanus – break in skin TB (tuberculosis) – inhaled Strep Throat – direct contact with mucus/ wounds Bubonic Plague Food Poisoning (E. Coli, Salmonella) Syphilis – sexual activity Chlamydia – sexual activity Gonorrhea – sexual activity

18.4 Bacteria and Archaea Controlling Bacteria Wash Hands Disinfectants Food Storage (cold) Food Processing (hot) Sterilization (heat) Vaccines Antibiotics

18.4 Bacteria and Archaea Good Bacteria!!!! Decomposers Nitrogen Fixers In human intestines (help digestion, produce vit. K) Used in food production (yogurt, soy sauce, pickles) Clean up oil spills Produce Oxygen (cyanobacteria)