Brush up - Vocabulary

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Across
  1. 3. - substance produced in organisms body when it reacts with poison.
  2. 4. - Poisonous substances release by disease causing organisms
  3. 6. - A chemical substance produced by living organism to inhibit the growth of other organism
Down
  1. 1. - disease causing organism
  2. 2. - Inactive toxins
  3. 5. - A preparation of live weakened germ or dead germ to produce immunity.