Ecology Extra Credit

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Across
  1. 2. Organisms that eat both plants and animals
  2. 4. Organisms that break down organic material
  3. 5. All interacting populations in a given area
  4. 7. Dry weight of living tissue to determine trophic level energy
  5. 12. Symbiotic relationship where one organism benefits and the other is unaffected
  6. 13. This percent of energy is transferred from one trophic level to another
  7. 15. Portion of earth where all organisms live
  8. 20. Another word for decomposers
Down
  1. 1. The maximum population size an environment can sustain
  2. 3. Organisms that make their own food
  3. 6. Linear path of energy transfer
  4. 8. All non-living factors in an environment
  5. 9. An organisms role in their environment
  6. 10. Two or more species needed the same resources
  7. 11. Means “living together”
  8. 14. Density ________ factors affect everyone in the population regardless of size (usually abiotic factors)
  9. 16. all living factors in an environment
  10. 17. Abiotic factors are also known as ______ factors
  11. 18. The study of the relationship between organisms and their environments
  12. 19. An animal that preys on others