biology

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Across
  1. 4. where both organisms benefit
  2. 5. a dramatic increase of phosphates and nitrates
  3. 7. rates a rate that makes the population decrease
  4. 9. the act of species entering a population
  5. 10. the energy photosynthesis needs to occur
  6. 13. A group of ecosystems that share a distinct climate
  7. 14. an observation, fact, or calculation
  8. 15. the act of species leaving a population
  9. 16. an example of a carbohydrate
Down
  1. 1. zones Eutrophication occurs the area beneath the algae becomes a
  2. 2. Social, Enviornmental,Economic
  3. 3. the energy produced in cellular respiration
  4. 6. respiration The process in which all biotic factors generate energy is called
  5. 8. rate a rate that makes the population higher
  6. 11. gas that is released as waste from photosynthesis
  7. 12. an elephant walking through a grassland