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Phenolphthalein is a pH indicator that is a reddish color at neutral but becomes bright yellow at acidic pH. Suppose you inoculate a tube of growth media containing phenolphthalein with a pure culture of an unknown microorganism, and after 24 hours the media starts to turn yellow. What can you conclude
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Phenolphthalein is a pH indicator that is a reddish color at neutral but becomes bright yellow at ac...
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