Science Crossword Puzzle

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Across
  1. 6. a large sack-like storage area
  2. 8. single-celled organism
  3. 10. the process by which plants make food
  4. 12. living thing that provides a source of energy for a virus
  5. 13. the region inside a cell membrane
  6. 15. a close relationship where at least one of the species benefits
Down
  1. 1. chemicals that produce color
  2. 2. stable internal conditions
  3. 3. the basic unit of structure of an organism
  4. 4. a chemical that makes the walls rigid
  5. 5. organisms that live on or in a host and cause harm to the host
  6. 7. composed of many cells
  7. 9. look similar to green jelly beans and make the plant's food
  8. 11. the branching, threadlike tubes that make up the bodies of multicellular fungi
  9. 14. small, nonliving part particle that invades and reproduces inside a cell
  10. 16. a form of asexual reproduction that yeast cells undergo