Antibiotic Resistance Crossword

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Across
  1. 3. In 1947 scientists observed what for the first time?
  2. 4. At the end of what was penicillin widely available?
  3. 6. Many scientists believe that feeding these to farm animals may contribute to drug resistance.
  4. 8. Who discovered penicillin?
  5. 9. Following the prescription directions strictly is a form of what?
Down
  1. 1. What causes antibiotic resistance during the replication process?
  2. 2. What is the ability of an organism to withstand the effects of an antibiotic?
  3. 5. The introduction of a new antibiotic was quickly followed by the first case of what?
  4. 7. In 1940 penicillin was tested on what?