29_protista - Dr. Donna R. Kashian Office Hours MW: after...

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Dr. Donna R. Kashian Office Hours e-mail: dkashian@wayne.edu 3177 Biological Sciences MW: after lecture until 12:30 or by appointment Phone: 577-8052
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Protists: Chapter 29 Animal –like Protist Amoeba Paramecium Plant- like Protists Algae (red, green, brown) Fungus-like Protist Slime molds
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Protista have a single origin = eucaryotic cell.
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4
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5 Many organelles evolved via endosymbiosis between an ancestral eukaryote and a bacterial cell Chloroplasts Larger bacteria engulfed smaller photosynthetic bacteria Mitochondria Aerobic bacteria engulfed by larger bacteria
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6 Endosymbiosis hypothesis supported by Ribosomes inside mitochondria similar to bacterial ribosomes Chloroplasts and mitochondria replicate by binary fission – not mitosis DNA inside mitochondria and chloroplasts
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7 Please note that due to differing operating systems, some animations will not appear until the presentation is viewed in Presentation Mode (Slide Show view). You may see blank slides in the “Normal” or “Slide Sorter” views. All animations will appear after viewing in Presentation Mode and playing each animation. Most animations will require the latest version of the Flash Player, which is available at http://get.adobe.com/flashplayer.
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Protists: 200,000 species come in different shapes, sizes, and colors (45 phyla) Eukaryotics cells differ from prokaryotes - presence of a cytoskeleton unicellular or multicellular variation in cell covering variation in feeding mode
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Ecological Diversity of Protist Pathogens decomposers Primary producers Symbionts Predators & filter feeders African sleeping sickness
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Cell surface Plasma membrane Extracellular material (ECM) in some Diatoms – Silica shells Cysts Dormant cell with resistant outer covering Used for disease transmission 10 Characteristics of Protists
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Locomotion Flagella Cilia Pseudopodia (“false feet”) 11 Characteristics of Protists cont’
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Nutrition Phototrophs Heterotrophs Phagotrophs – Ingest particulate food matter Osmotrophs – Soluble food matter 12 Characteristics of Protists cont’
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This note was uploaded on 06/13/2011 for the course BIO 1500 taught by Professor Pandolfi during the Winter '08 term at Wayne State University.

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29_protista - Dr. Donna R. Kashian Office Hours MW: after...

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