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#23 | Sources of Variation: 1
(Zoology) > Evolution
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Related Practice Questions :
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 non-resistant forms |
| 3. | the hospital environment inhibits competition among bacteria |
| 4. | penicillin triggers the synthesis of resistant proteins |
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