Chapter 28 Bacteria and Archaea

Chapter 28 Bacteria and Archaea -...

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Chapter 28 Bacteria and Archaea Chapter 28 Bacteria and Archaea The Prokaryotes The Simplest and Most Abundant Living Things Summary *How are Bacteria and Archaea related? *Importance of prokaryotes *How prokaryotes are studied *Bacteria vs. Archaea *Prokaryotes vs. Eukaryotes *Prokaryotes cell surface features *Genetic variation *Metabolism *Key Lineages Introduction *Approximately 5000 species of bacteria and archaea have been identified, there are probably 10’s of millions of species on Earth. *400 different species live in your GI tract, 500 in your mouth. *Abundance: There are 10 12 bacteria on your skin; and billions in a tsp of soil. Why do Biologists Study Bacteria and Archaea? *The Bad *The Good *Decomposition – breakdown dead organisms and return nutrients to the soil. *Fixation – conversion of inorganic elements to a form used by living things. *Extremophiles have enzymes that work in extreme conditions that may be useful for industry. Ex. Taq DNA polymerase for PCR.
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This note was uploaded on 09/08/2011 for the course BIOL 1403 taught by Professor Dini during the Fall '09 term at Texas Tech.

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Chapter 28 Bacteria and Archaea -...

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