Biology Semester 1

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Across
  1. 4. one of the four macromolecules found in living things
  2. 5. succession occurs in a area which no trace of a previous community is present
  3. 6. non-living factors of an environment
  4. 8. succession occurs in an area that was only partially destroyed by disturbances
  5. 9. one of the four elements that living things are mostly made of
  6. 10. effect the gases in the atmosphere that trap heat produce
  7. 11. symbiotic relationship in which both species benefit from the relationship
  8. 13. the study of living organisms
  9. 14. where an organism lives and what it does "for a living"
  10. 15. movement of individuals into an area
  11. 17. symbiotic relationship in which one organism benefits and the other is neither helped or harmed
Down
  1. 1. capacity the number of individuals an environment can support
  2. 2. living factors of an environment
  3. 3. density the number of individuals per unit area
  4. 7. rely on other organisms for their energy and food supply
  5. 12. factors cause a decrease in population growth
  6. 16. protons, neutrons, and electrons are the three subatomic particles that make what