Biology

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Across
  1. 1. becoming better suited to your environment
  2. 7. burning
  3. 8. remaining waste after food
  4. 9. a chemical element with the atomic number of six
  5. 11. to be able to be maintained at a certain level
  6. 12. populations of different species
  7. 13. a plant that grows on another plant - especially one that it not parasitic
  8. 16. physical rather than biological
  9. 18. Predator, highest in the food chain
  10. 19. without organized physical structure
  11. 21. the condition that separates plants and animals from inorganic matter
  12. 22. respiration without oxygen
  13. 24. the process of intake and release of air to produce energy
Down
  1. 2. the process of felling trees on a large scale
  2. 3. a single species
  3. 4. the process of decay
  4. 5. the process in which organisms use sunlight to produce nutrients
  5. 6. a repeating and often entrapping process.
  6. 10. an even distribution
  7. 13. a substance produced by a living organism that acts as a catalyst
  8. 14. decayed material which stores carbon
  9. 15. Level, each of the several hierarchical levels in an ecosystem
  10. 17. the dependence of two or more things on each other
  11. 20. the invisible gaseous substance surrounding the earth
  12. 23. single organisms