Lecture 10 Outline Chapter 28

Lecture 10 Outline Chapter 28 - Crampton Bio II Fall 2009...

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Crampton – Bio II Fall 2009 Lecture 10: THE PROTISTS Slide 1: Eukaryotes: membranous nucleus membrane bound organelles e.g. mitochondria e.g. chloroplasts e.g. golgi apparatus ... more complex cellular structure Slide 2: Protist is a convenient term that means “eukaryote that isn’t a fungus, animal or plant (it is a paraphyletic group) Protists are not monophyletic! Slide 3: An introduction to protists Usually unicellular (or form small multi-cellular colonies) Nutritionally diverse Mostly occur in water Sexual and asexual reproduction Possess specialized organelles Highly diverse Slide 4: 1. Photoautotrophs (photoautotrophs): Plant-like Alga/e Have chloroplasts (a class of PLASTID). Plastids are major organelles found in algae and plants 2. Ingestive (heterotrophs – food particles): Animal-like Protozoa 3. Absorbtive (heterotrophs – organic molecules): Fungus-like Oomycetes + others 4. Photosynthetic / Heterotrophic (Mixotrophic) Animal/Plant like e.g. Euglena Euglena can switch to heterotrophy in absence of light 1
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Crampton – Bio II Fall 2009 Slide 5: REVISION: From Prokaryote to Eukaryote The Endosymbiotic Model Small prokaryotes enter host or engulfed prey or parasites Host gain a selective advantage (e.g. energy from mitochondrial ancestors) Host and endosymbionts become single organism Mitochondria: All eukaryotes have mitochondria (or their recent ancestors had them). Mitochondrial DNA very similar to DNA of some bacteria Slide 6: Slide 7: Early branching order not yet resolved. Possibly no single ‘root’ – i.e. multiple origins from different bacterial groups Phylogeny recently been substantially improved based on congruent data from various sources. Your textbook (8 th edition) covers these updates. Remember phylogenies are UCF! 2
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Crampton – Bio II Fall 2009 Slide 8: A guided tour to Protista: Focus less on the specific names of organisms and more on why the organisms are important. ...” Focus on:
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This note was uploaded on 11/08/2011 for the course BSC 2011C taught by Professor Klowden/crampton during the Fall '11 term at University of Central Florida.

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Lecture 10 Outline Chapter 28 - Crampton Bio II Fall 2009...

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