chap2

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Across
  1. 1. Tobacco mosaic plant disease caused by
  2. 4. Disease – causing microbe
  3. 5. Micro-organisms produce __________ in the food items they grow
  4. 6. This is a substance present in the blood that helps to provide immunity
  5. 8. Dry fruits and vegetables are preserved by this method
Down
  1. 1. Substance used to produce immunity in living body
  2. 2. Healthy bacteria
  3. 3. Air-borne disease caused by bacteria
  4. 7. Short form of polio vaccine
  5. 9. Spirogyra is an example of