Bio 111 - Lecture 5

Bio 111 - Lecture 5 - Biology 111 Lecture 5 - Domain...

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Biology 111 Lecture 5 - Domain Eukarya Kingdom Protista September 17, 2007 Review - Eukarya A. All remaining organisms are eukaryotes 1. Membrane bound nucleus 2. Nucleus is large spheric organelle 3. Chromosomes in nucleus 4. Mitosis and Meiosis I. Traditionally 2 Groups: algae and protozoa algae - autotrophic protozoa - heterotrophic - Recent evidence: artifcial groups - Phyla or “algae” can have heterotrophic species - Some algae more closely related to protozoa than to other algae II. “Algae” - autotrophic protists A. Phylum euglenophyta 1. Microscopic, 1 celled 2. Bright green 3. No cell wall, shape shiFter 4. Motile. One visible ±agellum and another shorter one hidden in a pocket 5. mainly Fresh water 6. contain green chloroplasts within the cytoplasm Ex. Euglena has red or yellow eye spot = light sensitive region B. Phylum Pyrrophyta - Dinofagellates - pyrro “fre” dino “whirling” because oF red tides and bioluminescence 1. Microscopic single celled organisms 2. Yellow brown to red accessory pigments mask green chlorophyll 3. Cell walls oF cellulose
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4. Two fagella in perpendicular grooves oF cell wall. (cause the cell to spin) 5. Marine (salt water) and Freshwater - Causes Red Tides - toxins poison ±sh and invertebrate animals - humans are poisoned when eating seaFood during a Fed tide - Can produce bioluminescence - chemicals give oFF light when agitated - basis For the name pyrrophyta C. Phylum Bacillariophyta - Diatoms 1. Microscopic single celled organisms
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This note was uploaded on 09/11/2008 for the course BIO 111 taught by Professor Parfitt during the Fall '07 term at Michigan Flint.

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Bio 111 - Lecture 5 - Biology 111 Lecture 5 - Domain...

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