W´s all the way

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Across
  1. 4. a pyramid that represents energy flow
  2. 5. an individual animal, plant, or single-celled life form.
  3. 8. is a nonliving organism
  4. 10. is a location where animals live ( or a certain ecosystem )
  5. 11. deep sleep
  6. 13. is a pigment that makes plants green
  7. 16. the place where abiotic and biotic factors live together
  8. 17. a thing or event that evokes a specific functional reaction in an organ or tissue
Down
  1. 1. an organism that eats to survive
  2. 2. anything that constrains a population's size and slows or stops it from growing.
  3. 3. is a living organism
  4. 6. the turning of all or part of an organism in a particular direction in response to an external stimulus.
  5. 7. an interacting group of various species in a common location
  6. 9. is an animal that eats other animals
  7. 12. a particular section, group, or type of people or animals living in an area or country
  8. 14. an animal that breaks down dead plants or animals
  9. 15. the path of energy passing through animals that eat other animals