Chapter 27 Key Terms 3

Chapter 27 Key - Bioremediation The use of organisms to detoxify and restore polluted and degraded ecosystems Endotoxin A toxic component of the

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Bioremediation - The use of organisms to detoxify and restore polluted and degraded ecosystems. Endotoxin - A toxic component of the outer membrane of certain gram-negative bacteria that is released only when the bacteria die. Exotoxin - (ek´-so-tok´-sin) A toxic protein that is secreted by a prokaryote or other pathogen and that produces specific symptoms, even if the pathogen is no longer present. Pathogen - An organism or virus that causes disease. extreme halophile - An organism that lives in a highly saline environment, such as the Great Salt Lake or the Dead Sea. extreme thermophile - An organism that thrives in hot environments (often 60–80°C or hotter). Extremophile - An organism that lives in an environment whose conditions are so extreme that few other species can survive there. Extremophiles include extreme halophiles and extreme thermophiles. Gram stain - A staining method that distinguishes between two different kinds of bacterial cell walls. gram-negative
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This note was uploaded on 04/28/2011 for the course BIO V23.0012 taught by Professor Borowsky during the Spring '10 term at NYU.

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