Multiple choice

Many bacteria are now resistant to penicillin, because

  1. penicillin causes gene mutations, some of which are beneficial

  2. previously resistant forms survived and reproduced better than susceptible forms

  3. the hospital environment inhibits competition among bacteria

  4. penicillin triggers the synthesis of resistant proteins
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Many bacteria are now resistant to penicillin, because previously resistant forms survived and reproduced better than susceptible forms.

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