Ch 13 Crossword Puzzle

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Across
  1. 5. they are extremely variable eukaryotes
  2. 6. dormant forms of cells with a resistant outer covering in which cell metabolism is shut down
  3. 9. use sunlight energy to make their food
  4. 11. fungal and plant associations that helps the plants absorption of essential nutrients in roots
  5. 13. an association in which a fungus and an alga are in intimate contact and benefit from each other
  6. 14. the use of prokaryotes to remove pollutants from the environment
  7. 15. makes its own carbon molecules from inorganic forms of carbon (CO2)
Down
  1. 1. use chemical compounds to make their food
  2. 2. unicellular or multicellular heterotrophic eukaryotes that obtain nutrients by external digestion
  3. 3. considered chemical assemblies segments of nucleic acid wrapped in a protein coat
  4. 4. gains its carbon from other organisms (living or dead)
  5. 7. enclosures of DNA and a small bit of cytoplasm
  6. 8. theory that suggests one prokaryote engulfed another living within another
  7. 10. small simply organized single cells that lack a nucleus
  8. 12. organism produced chemical that is hostile to the growth other organisms