Bacteria and Viruses

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Across
  1. 4. use of living organisms to break down toxic and harmful substances in the environment
  2. 5. temporary union of two organisms of cells for a one-way transfer of genetic material
  3. 6. an organism that shelters and nourishes something
  4. 7. virus that causes the disease AIDS
  5. 8. cellular secretion surrounding certain algae and bacteria
Down
  1. 1. used to stimulate the body's immune response against diseases
  2. 2. agents which cause diseases
  3. 3. viral protein molecule that causes diseases in animals
  4. 4. large group of single-cell microorganisms
  5. 5. the protein coat of a virus