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auxotrophic

[ awk-sō-trŏfĭk ]
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adj.

Requiring one or more specific substances for growth and metabolism that the parent organism was able to synthesize on its own. Used with respect to organisms, such as strains of bacteria, algae, or fungi, that can no longer synthesize certain growth factors because of mutational changes.

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Question 1 of 7
The rainy weather could not ________ my elated spirits on my graduation day.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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