Rizzo+lect12

Rizzo+lect12 - Midterm on Friday Section A A-G 3 Kleiber...

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Midterm on Friday Section A A-G 3 Kleiber H-Z SciLec 123 Section B A-Gr 2 Wellman Gs-J 119 Wellman K-Z SocSci 1100 Bring: 1. Pencil 2. Eraser 3. Pen 4. Picture ID
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Tree of Life image © 2007 Tree of Life Web Project.
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Key points: Everything other than land plants, animals, and fungi Referred to as protists or microbial eukaryotes Paraphyletic group
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Lots of ambiguities in resolving early events in evolution of eukaryotes ajor Eukaryote roups
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Lots of ambiguities in resolving early events in evolution of eukaryotes ajor Eukaryote roups
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Many aspects of diversity in eukaryotic microbes: Morphology (unicellular, multicellular) Locomotion (flagella, cilia, pseudopods) Metabolism (autotrophs, heterotrophs) Symbioses (endosymbioses, parasites) Reproduction (sexual, asexual) Importance to humans (pathogens, landscapes)
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The oomycetes are absorptive heterotrophs. This means: 1. They secrete enzymes outside of their “bodies” that digest food molecules and then absorb them 2. They use phagocytosis to capture prey and absorb the nutrients 3. They have a symbiosis with photosynthetic bacteria from which they absorb nutrients 4. They are photosynthetic but still need to absorb inorganic nutrients from the surrounding substrate
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The oomycetes are absorptive heterotrophs. This means: 1. They secrete enzymes outside of their “bodies” that digest food molecules into smaller molecules that can then be absorbed 2. They use phagocytosis to capture prey and absorb the nutrients 3. They have a symbiosis with photosynthetic bacteria from which they absorb nutrients 4. They are photosynthetic but still need to absorb inorganic nutrients from the surrounding substrate
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Rizzo+lect12 - Midterm on Friday Section A A-G 3 Kleiber...

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