Replica plating showed that mutations for antibiotic resistance are NOT induced by the presence of the antibiotic because antibiotic-resistant cells:

Question

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Replica plating experiments demonstrate that antibiotic-resistant mutations occur spontaneously and not as a direct response to the antibiotic because resistant colonies can be found in populations that have not been exposed to the antibiotic. This indicates that the mutations for resistance pre-exist the application of the antibiotic, rather than being induced by it.

Replica Plating Showed That Mutations for Antibiotic Resistance Are NOT