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The Evolutionary History of Biodiversity

Protists. The Evolutionary History of Biodiversity. Concept 2: Analyzing the diversity of bacteria, archaea, protists, and fungi (Ch 26, 27, 28, 31). But first...Try This! (from Bacteria and Archaea).

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The Evolutionary History of Biodiversity

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  1. Protists The Evolutionary History of Biodiversity Concept 2: Analyzing the diversity of bacteria, archaea, protists, and fungi (Ch 26, 27, 28, 31)

  2. But first...Try This! (from Bacteria and Archaea) • What features of prokaryotes make it likely that considerable genetic variation will be added to their populations with each generation? • What are the differences between the four major types of nutrition in prokaryotes. Which are only possible in prokaryotes? • Identify three ways that prokaryotes have positively (mutualistically or commensally) affect your life so far today.

  3. But first...Try This! (from Bacteria and Archaea) • What features of prokaryotes make it likely that considerable genetic variation will be added to their populations with each generation? • Rapid cell division with high probability of mutations • Transformation • Conjugation • Transduction

  4. But first...Try This! (from Bacteria and Archaea) • What are the differences between the four major types of nutrition in prokaryotes. Which are only possible in prokaryotes? • Photoautotrophic – like plants! • Photoheterotrophic – prokaryotes only • Chemoautotrophic – prokaryotes only • Chemoheterotrophic – like you (and spiders...)!

  5. But first...Try This! (from Bacteria and Archaea) • Identify three ways that prokaryotes have positively (mutualistically or commensally) affect your life so far today.

  6. Protists You must know: • An appreciation of the “real kingdoms” of Protista. • How chloroplasts and mitochondria evolved through endosymbiosis. • Refer to Ch 28 in Campbell and media resources

  7. Protists • Eukaryotic • Not plants • Not animals • Not fungi • Not necessarily single celled (but most are) • “True” sexual reproduction (and asexual) • Polyphyletic (or… Paraphyletic?... There is debate!) • NOT one kingdom! (and don’t let anyone tell you it is) • INCREDIBLY diverse

  8. Endosymbiosis • The birth of the Eukaryote? • Primary verses secondary endosymbiosis

  9. Endosymbiosis • The birth of the Eukaryote? • Primary verses secondary endosymbiosis

  10. Classification – See page E-2 at back of Campbell • Three categories? • Animal-like • Plant-like • Fungus-like • Nothing-like? • Five “supergroups” of the Eukaryotic domain? • Excavata • Chromalveolata • Rhizaria • Archaeplastida • Unikonta

  11. In Motion…

  12. In Motion…

  13. Ecological Connections • Mutualistic Symbiosis • Photosynthetic dinoflagellates and coral polyps • Protists and termites • Parasitic Symbiosis • Malaria-causing protist Plasodium • Photosynthetic Producers • ¼ of all the world’s photosynthesis done by diatoms, dinoflagenllates, multicellular algae and other protists! • Foundation of many food webs

  14. Let’s Explore!!! • I’d like to introduce you to: • Paramecium aurelia • Didinium • Amoeba proteus • Stentor coeruleus

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