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Kingdom Protista

Kingdom Protista. The kingdom of misfits - organisms which are not fungi, not plants and not animals. 200,000 species. - microscopic to macroscopic - unicellular or colonial - free-living or parasitic - autotrophic or heterotrophic - all are eukaryotes.

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Kingdom Protista

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  1. Kingdom Protista The kingdom of misfits - organisms which are not fungi, not plants and not animals

  2. 200,000 species • - microscopic to macroscopic • - unicellular or colonial • - free-living or parasitic • - autotrophic or heterotrophic • - all are eukaryotes

  3. Animal –like Protists or Protozoa • Classified by how or if they move • Zoomastigina • Sarcodina • Ciliophoroa • Sporozoa

  4. Animal-like Protists – Phylum Zoomastigina • Phylum Zoomastigina or flagellates • Move with flagella • Absorb food directly through cell membranes • Some live in ponds and streams • Some live inside other organisms

  5. Animal-like Protists Phylum Sarcodina • Phylum Sarcodina • move with pseudopods • Best known examples are the amoebas • No specific shape • Use pseudopods to capture food and to move • phagocytosis

  6. Animal-like Protists Phylum Ciliophoroa • Have cilia • Usually more complex • Many specialized organelles • Contractile vacuoles • Gullet • Anal pore • Trichocysts

  7. The Paramecium • Two types of nuclei • Macronucleus • Micronucleus • Influence type of reproduction • Binary fission • Conjugation

  8. Conjugation • Form of sexual reproduction • Exchange of genetic material • Result is two genetically identical paramecia • May account for diversity

  9. Phylum Sporozoa • No structures for movement • Parasitic – form spores which pass from one host to the next • Infect fishes, worms, insects, birds and human

  10. Plant-like Protists • Contain chlorophyll and are photosynthetic • Also examples of algae (red alga, brown alga and green alga) Phylum Euglenophyta Phylum Pyrrophyta Phylum Chrysophyta

  11. Phylum Euglenophyta • Similar to flagellates • Found in ponds and streams • Reproduce by binary fission • Contain chlorophyll • Light-sensing eyespots

  12. Phylum Pyrrophyta • Often called dinoflagellates • Most are photosynthetic • Some are heterotrophic • Marine and fresh-water • “fire” plants

  13. Phylum Chrysophyta • Include yellow-green algae, golden algae, and diatoms • Contain cell walls with pectin • Diatoms produce silica

  14. Colonial wonder of nature • Volvox are flagellated protists which always form spherical colonies • The parent colony will release the daughter colonies

  15. Fungus-like Protists • Lack chlorophyll • Absorb food through cell walls • Include: • Cellular slime molds • Acellular slime molds • Water molds

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