Bacteria

Name: ______________________   Date: ____________

Use the clues to fill in the crossword.

Across

  1. 2. Any disease-producing agent (8)
  2. 4. Providing assistance or serving a useful function (7)
  3. 5. An animal or plant that lives in or on a host (8)
  4. 6. Care provided to improve a situation (plural) (10)
  5. 7. A long linear polymer found in the nucleus of a cell and formed from nucleotides and shaped like (3)
  6. 8. Any organism of ___ size (13)
  7. 11. Tiniest unit of living things (4)
  8. 12. The invasion of the body by pathogenic microorganisms and their multiplication which can lead (9)
  9. 13. Reproduction of some unicellular organisms by division of the cell into two more or less equal parts (7)
  10. 14. A poisonous substance produced during the metabolism and growth of certain microorganisms and some (plural) (6)

Down

  1. 1. Tiny single-celled living things, some of which cause illness (8)
  2. 3. Having cells that lack membrane-bound nuclei (11)
  3. 4. An organism that depends on complex organic substances for nutrition (11)
  4. 7. An illness that harms the body (7)
  5. 9. A chemical substance derivable from a mold or bacterium that can kill microorganisms and cure (plural) (11)
  6. 10. A system of two stars that revolve around each other under their mutual gravitation (6)