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Biology, 22.11.2019 00:31 anaruiz00

(18pts)
penicillin is a drug that kills bacteria today many bacteria are resistant to disease how does natural selection best explain this observation?

a) penicillin causes some bacteria to mutate
b) some bacteria survive penicillin and reproduce.
c)resistant bacteria cannot be attacked by penicillin
d) resistant bacteria mutate more quickly than normal bacteria
explain your answer, !

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