3-11-08 notes

3-11-08 notes - March 11, 2008 Final exam 100 questions 50...

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March 11, 2008 Final exam 100 questions 50 questions from material from the last quarter of the semester (since exam 3) Remaining 50 questions o 2/3 from Safran’s lecture o 1/3 from Davies’ lecture 4. Ecology and human uses Fungi can be: Decomposers—fungi are essential for the cycling of dead material o Break down complex organic molecules, including cellulose, lignin of plant cell walls o Convert organic compounds to inorganic nutrients Symbionts—mutualists o Symbiosis: interspecific relationship where partners are in direct contact o Mutualism= +/+ interaction o Lichens: Mutualism between: Fungus—provides structure Alga or cyanobacterium—provides food Ex. Mycorrhizae: “Fungus roots” Mutualism between fungus and plant Endomycorrhizae—extend hyphae through root cell wall Ectomycorrhizae—hyphae form on root surface Pathogens o About 30% of 100,000 known species of fungi are parasites, mostly on or in plants
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o Dutch elm disease, Chestnut blight
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3-11-08 notes - March 11, 2008 Final exam 100 questions 50...

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