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  1. 1. What are bacteria like? flagellum genetic material capsule cell wall• Unicellular• Prokaryote cytoplasm cell• Most are heterotrophs. membrane• Some form colonies.• Habitat: all types
  2. 2. Bacteria nutritionHeterotrophs Autotrophs Parasites Saprophytes Symbionts Photosynthesis
  3. 3. Bacteria nutrition • feed off living things Parasites Heterotrophs • cause illnesses (tuberculosis, cholera) • live on dead or decomposing matter • are used to make food Saprophytes milk • live in the bodies cheese of other living things yoghurt Symbionts intestinal bacteria
  4. 4. Bacteria nutritionAutotrophs cyanobacteria carbon dioxide P H O T O S Y N T H E S I S oxygen + organic substances
  5. 5. How are bacteria classified?Coccus Vibrio curved - spherical rod shapedBacillus Spirillumrod-shaped helical
  6. 6. How do bacteria reproduce and interact? Binary fission Sporulation Environmentalminutes conditions 0 unfavourable 30 resistant spores 60 favourable 90 growth of bacteria 1.500 1.000amount 50of bacteria(in millions) 5 15 20 Time (in hours)