juniorrr1 juniorrr1
  • 03-12-2017
  • Biology
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Penicillin is an antibiotic that was discovered in 1928. Today, many species of bacteria have acquired resistance to penicillin. This adaptation occurred as the result of

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thebairdfamily5
thebairdfamily5 thebairdfamily5
  • 03-12-2017
The answer is genetic mutation.
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