Week9_Section_Nhat_key

Week9_Section_Nhat_key - Nhat Pham BIMM120 nmpham@ucsd.edu...

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Nhat Pham  BIMM120 nmpham@ucsd.edu 11/30/09 OH: Mon 5pm-7pm Bonner 3126 Handout #9 DISCUSSION 1. Define the following classifications of bacteria based on their metabolic properties:  autotroph, heterotroph, phototroph, chemotroph, lithotroph. By carbon source: Autotroph: Use CO 2  as C source Heterotroph: Use organic compounds as C source By energy source: Phototroph: carry out photosynthesis to produce energy Chemotroph: obtain energy from chemicals Organotroph: energy from organic chemicals Lithotroph: energy from inorganic chemicals Note: Most bacteria are classified as a combination of 2 or more of the above. For  example, cyanobacteria are photolithoautotrophs: they use CO as C source, are  capable of obtaining energy from sunlight and inorganic chemicals 2. Demonstrate the process of eutrophication. Eutrophication usually results from excess release of chemical nutrients (e.g. nitrogen or  phosphorous compounds from runoff, sewage, manure, fertilizer, etc.) into the environment.  The following effects could result from this event: - Altered quality of the environment. For example, the chemicals (e.g. ammonia and  nitrate) may be toxic to indigenous organisms (e.g. fish, etc.) at high concentration. -
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This note was uploaded on 04/29/2010 for the course PSYCH PSYCH 179 taught by Professor Koob during the Fall '09 term at UCSD.

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Week9_Section_Nhat_key - Nhat Pham BIMM120 nmpham@ucsd.edu...

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