Biology Think-Tac-Toe

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Across
  1. 2. A relationship between two species in which both benefit.
  2. 3. Level The level of energy on an energy pyramid.
  3. 7. A state of balance between internal, chemical, and physical conditions.
  4. 8. Species The first species to colonize an environment.
  5. 9. Succession Succession when the environment is barren.
  6. 13. Community When an ecological community has reached stability.
Down
  1. 1. The organisms in a community that provide their own nutrients for themselves.
  2. 4. An organism that eats other organisms for nutrients.
  3. 5. A relationship between two species in which one benefits and the other isn't affected.
  4. 6. An organism that can make their own nutrients.
  5. 8. Symbiosis in which one organism benefits and the other is harmed.
  6. 10. The non-living factors of an ecological community.
  7. 11. Succession Succession when the environment starts with some ecological factors such as soil.
  8. 12. The living factors of an ecological community.