bacteria basics notes - I Basics of Bacteria A BacteriaThe...

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I. Basics of Bacteria A. Bacteria - The smallest and most common micro-organisms. are prokaryotes Uni-cellular organisms that lacks a nucleus (Prokaryotes) B. The two domains of prokaryotes are: Archaea (OLDEST) & Eubacteria (more common) 1. Three characteristics of Eubacteria are: a. Cell Wall-protects and determines shape b. Cell membrane surrounds cytoplasm c. Google a picture of e-coli E.Coli -lives in your gut and does not hurt you Contaminated food can make you sick Eubacteria- can be found living in fresh and salt water, on land, in the human body Bacteria that is found in your gut helps to break down food. Archaebacteria -can be found living in EXTREME environments: --Live in oxygen-free environments, such as thick mud and animal digestive tracts/ --Live in salty environments --Live in hot springs and deep sea levels
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Unformatted text preview: How Prokaryotes are classified 1) 3 basic Shapes (bascilli, spirilla, cocci) Bascilli-rod shaped Spirilla-round Cocci-spiral 2) The chemical nature of their cell walls 3) The way they move 4) The way they obtain energy METABOLIC DIVERSITY Heterotrophs-obtain energy by consuming organic molecules Autotrophs-some bacteria make their own food. Bacteria grows thru BINARY FISSION BINARY FISSON-type of asexual reproduction which an organism replicates it’s DNA and divides in half, producing two identical daughter cells. Some bacteria can reproduce very quickly. GENETIC DIVERSITY Conjugation-transfers DNA between bacteria. This can be advantageous so that bacteria can change and evolve and perhaps become resistant....
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  • Fall '12
  • Donto
  • Bacteria, Nucleus, eubacteria, (Prokaryotes), animal digestive tracts/, deep sea levels, Autotrophs-some bacteria

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