Biology, 28.07.2019 18:30 corbinfisher
Penicillin (an antibiotic that kills some bacteria) came into widespread use in the 1940s. by the 1990s, several different species of bacteria were already resistant to the effects of penicillin, and it can no longer be used to treat certain diseases. what is the most likely explanation for this?
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Penicillin (an antibiotic that kills some bacteria) came into widespread use in the 1940s. by the 19...
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