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Kingdom Protista

Kingdom Protista. Eukaryotes Most with one cell ( Unicellular ) Some with many cells ( Multicellular ): seaweed Autotrophs or Heterotrophs Protists contains organisms that do not fit into the other eukaryotic kingdoms Protists evolved from prokaryotes (bacteria) Protista can be:

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Kingdom Protista

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  1. Kingdom Protista • Eukaryotes • Most with one cell (Unicellular) • Some with many cells (Multicellular): seaweed • Autotrophs or Heterotrophs • Protists contains organisms that do not fit into the other eukaryotic kingdoms • Protists evolved from prokaryotes (bacteria) • Protista can be: Animal-like, Plant-like, Fungus-like

  2. Movement in Protista1.Flagella: long, whip-like projection Most have just 1 or 2 flagella

  3. Paramecium caudatum 2.Cilia: Short, hair-like projections. Too many cilia to count

  4. 3.Pseudopods: Temporary projections of the cytoplasm. Change shape constantly Amoeba proteus

  5. Reproduction 1.Binary Fission: Split into 2 identical cells 2.Conjugation: Exchange pieces of DNA. Then split in 2. Increase genetic diversity

  6. 1. Animal-like Protista • All heterotrophic (like animals). Need to consume other organisms Trypanosoma: parasite blood Vorticella: cilia, freshwater

  7. Trichonympha: Intestine of termites Trychonympha breaks down cellulose in wood. Paramecium: Freshwater, cilia, unicellular

  8. 2. Plant-like Protista = Algae • All autotrophic, like plants. Photosynthesis • Have chlorophyll inside chloroplasts. Volvox: freshwater Diatoms: aquatic with a shell - produce most O2 on Earth

  9. Green algae (seaweed) Marine, multicellular Euglena: freshwater, Unicellular, flagellum

  10. Plankton: verysmall floating organisms in freshwater and marine environments. Plankton = Phytoplankton + Zooplankton 1. Zooplankton: heterotrophic organisms 2. Phytoplankton: autotrophic organisms –photosynthesis Phytoplankton produce most of the oxygen on Earth!!

  11. Phytoplankton from Space

  12. All heterotrophs – Decomposers: Absorb nutrients from dead or decaying organic matter Slime mold on mulch 3. Fungus-like Protista Phytophthora infestans: Potato blight – destroyed potato crops in Ireland in 1844-1851

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