Introduction to Bacteria 2 types of bacteria



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Bacteria ppt

Reproduction of Bacteria

Bacterial Cell & Nucleiod DNA Ring

DNA replication

Cell wall synthesis

Cell separation

Binary Fission



Bacteria Survival

Endospore-
  • they are the major cause of food poisoning
  • they can withstand boiling, freezing, and extremely dry conditions
  • allows the bacteria to survive for many years

Bacillus subtilis

Endospore-the black section in the middle


  • highly resistant structures
  • can withstand radiation, UV light, and boiling at 120oC for 15 minutes.

Bacteria Survival

Bacteria Survival – Food sources

parasites – bacteria that feed on living things

saprophytes – use dead materials for food (exclusively)

decomposers get food from breaking down dead matter into simple chemicals
      • important- because they send minerals and other materials back into the soil so other organisms can use them


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