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Mathematics 7 Online
OpenStudy (anonymous):

. Humans developed antibiotics to fight bacterial infections. However, some antibiotics are no longer effective in killing the bacteria they once killed. How does the theory of evolution explain this? (1 point) • After being exposed to the antibiotic, individual bacteria acquired the ability to resist the antibiotic. • Genetic variation in bacteria made it possible for some individuals to have resistance to the antibiotic, survive, and reproduce. • The antibiotic mutated to an ineffective form.

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