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Chapter 28

Chapter 28. Evolution of Eukaryotic Diversity Kingdom Protista. History of Classification. I. Endosymbiotic Theory. II. Kingdom Protista. Most diverse of all kingdoms Classification difficult; created more for convenience. A. General Characteristics. Eukaryotic

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Chapter 28

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  1. Chapter 28 Evolution of Eukaryotic Diversity Kingdom Protista

  2. History of Classification

  3. I. Endosymbiotic Theory

  4. II. Kingdom Protista • Most diverse of all kingdoms • Classification difficult; created more for convenience

  5. A. General Characteristics • Eukaryotic • Most single-celled, some colonial, some multicellular • Neither animals, plants or fungi • Auto or heterotrophs; some mixotrophs • Many have either cilia or flagella with 9+2 microtubule arrangement at some point in life cycle • Varied life cycle: alternation of generation, to predominant multicellular diploid life, or predominant multicellular haploid life

  6. B. 3 Major Categories • Animal-like (protozoa) • Algae or plant-like (photosynthetic) • Fungal-like

  7. III. Animal-Like Protists • Called Protozoa • May have given rise to animals • Asexual or sexual reproduction • Many form cysts (resistant bodies) and wait out stressful conditions • Usually non-photosynthetic heterotrophs

  8. Rhizopoda(Amoeba) • amoeba video

  9. Actinopoda(Actinopods, Foraminiferans) Radiolarian Foraminifean

  10. Zoomastigina(zooflagellates) Giardia lamblia Trypansoma Trichomonas vaginalis

  11. Ciliophora(Ciliates) Stentor Video

  12. Apicomplexa(Sporozoa)

  13. IV. Algae and Plant-like Protists • Photosynthetic!! • Many have flagella and are often mistaken to be animal-like protists • All have chll a, carotenoids, other forms of chll, and other accessory pigments • Not considered true plants due to lack of plant structures such as a waxy cuticle

  14. Euglenophyta(Euglenoids) videos

  15. Dinoflagellata(Dinoflagellates) video

  16. Bacillariophyta(Diatoms) video

  17. Chrysophyta(Golden Algae)

  18. Chlorophyta(Green Algae) • Volvox Video

  19. Phaeophyta(Brown Algae)

  20. Rhodophyta(Red Algae)

  21. Fungal-like Protists • Form filaments (spore-bearing bodies) similar to fungus

  22. Acrasiomycota(cellular slime molds)

  23. Myxomycota(Plasmodial Slime Molds)video

  24. Oomycota(Water molds, downey mildews, white rust)

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