Protists_Lab_5_2010_student - Lab 5 Protists pp.89-108...

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Lab 5: Protists pp.89-108
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Diversity Once a "catch-all” kingdom protista Now in Domain Eukarya Includes everything that’s not plant, animal prokaryote or fungus. Looking to the phylogeny, its a paraphyletic group (all the yellow groups) Today we study the circled ones
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Diversity unicellular (mostly), filamentous, colonial or multicellular marine (major component of plankton), freshwater or moist terrestrial habitats autotrophic (photosynthetic), heterotrophic (parasitic or saprophytic), or mixotrophic Types: the Protozoa (animal-like), the Algae (plant-like), and the Fungus-like Protists We will examine 7 major groups, focusing on: Nutrition Autotrophs, Heterotrophs or Mixotrophs Locomotion Ecological Roles/Importance
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A. Euglenozoans Characterized by structure of flagella and mitochondria Flagella emerge from pocket at one end of cell Euglena Mixotrophic Ecology: freshwater, eaten by invertebrates or small vertebrates Characterized by their kinetoplast (mass of DNA) in mitochondria 2 parasites: Trypanosoma gamebiense W. African sleeping sickness (vector is tsetse fly) Trypanosoma levisi Infects rats (vector is flea) i. Euglenids II. Kinetoplastids
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B. Alveolates Characterized by alveoli (sac) under cell membrane I. Apicomplexan “complex at apex” of cell, used to penetrate host tissue
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  • Fall '07
  • staff
  • Bacteria, Brown algae, Red algae, G. Green Algae

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