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2010-06-08 23:43:08

Biodiversity Notes
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  1. Homologous Trait
    Conserved traits among organisms with a common ancestor
  2. Phylogenetic tree
    A diagrammatic representation of genetic distances between populations, species or higher taxa
  3. Chemoautotroph
    A simple organism, such as protozoan, that derives its energy from chemical processes rather than photosynthesis
  4. Heterotroph
    An organism that is incapable of synthesizing its own food and, therefore, must feed upon organic compounds produced by other organism
  5. Chemoheterotroph
    An organism that uses oxidation of organic molecules to generate energy
  6. Bacteria
    A single celled organism with no nucleus
  7. Halophile
    An organism that lives in a high saline environment
  8. Methanogen
    Organisms taht produce methane as a result of metabolism in an anoxic environment
  9. Thermus Aquaticus
    A species of bacterium that can tolerate high temperatures and is the source of the heat-resistant enzyme Taq DNA Polymerase
  10. Prokaryotes
    Tiny unicellular organisms that don't have a nucleus or organelles
  11. Clonal Cell Division
    After division, instead of separating, cells stay attached to each other and differentiate
  12. Metazoa
    A major group of mostly multicellular, eukaryotic organisms, their body plan eventually becomes fixed as they develop, most are motile and all are heterotrophs
  13. Bilateral Symmetry
    Only one plane will divide the organism into mirror image halves
  14. Pentaradial Symmetry
    Symmetry in five planes. Each plane is identical. Often seen in Star Fish
  15. Cambrian Explosion
    This mass radiation of species diversity marks the beginning of a major division in geological time known as the Phanerozoic