Certain antibiotics are no longer effective against the bacteria that they used to kill. Which of the following best explains why certain antibiotics are no longer effective?
The number of bacteria is now greater than what the antibiotic can kill
The antibiotic has become weaker over time
Bacteria that were resistant to the antibiotic survived to reproduce
Changes in the environment made the antibiotic ineffective
Answers: 1
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Certain antibiotics are no longer effective against the bacteria that they used to kill. Which of th...
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