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ALGAE lecture - ALGAE Plant like protist(Chapter 28 pp...

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ALGAE Plant like protist (Chapter 28, pp. 564ff) Tamara Avellan February 24 th 2006
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Definition Eukaryotic plant like organisms within the kingdom of PROTISTA. Characteristics: - Autotrophic => Photosynthesis - Cell walls with cellulose - Starch storage - Some are symbiotic
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Classification Groups and divisions: 1) Euglenozoa a. Euglenoids 2) Alveolata a. Pyrrophyta (Dinoflagellates) 3) Stramenopila a. Chrysophyta (Diatoms) b. Phaeophyta (brown algae) 4) Rhodophyta (red algae) 5) Chlorophyta (green algae)
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Euglenoids unicellular Ca. 40 genera have chloroplasts – autotrophic 10-500 um long, variable shapes (flexible pellicle) Reproduction through mitosis (non-sexual) Euglena Two flagella one long, one short Contractile vacuole for water balance Light sensitive stigma Chloroplasts with chlorophyll a&b, carotenoids
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Alveolata Pyrrophyta – Dinoflagellates Unicellular +1000 species Mainly marine, major phytoplankton Two flagella in grooves perpendicular to each other Chlorophyll a&c, carotenoids Reproduction through fission (rare sexual)
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