Biology

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Across
  1. 2. Kills/prevents insects
  2. 4. How often.
  3. 6. Living things that often interact in special ways and depend on each other for survival.
  4. 8. How fast organisms have babies.
  5. 12. Kills bacteria.
  6. 15. Gases Gases that trap heat and cause global temperatures to rise.
  7. 17. To many species for resources available.
  8. 19. growth Where growth slows down as the population reaches the carrying capacity.
  9. 20. The gradual change.
  10. 21. Fighting for resources.
  11. 23. Living things stay about the same.
  12. 25. Nutrients enter water sources.
  13. 28. Ecosystems go back to their natural state.
  14. 29. New DNA that consists of one original strand.
Down
  1. 1. isolation A group of the same species becomes separated.
  2. 3. factor Something that prevents a population from growing too big.
  3. 5. Structures that contain DNA
  4. 6. When plants and animals gradually take over an area.
  5. 7. New species evolves.
  6. 9. Make their own food.
  7. 10. Impact People's effects on the environment.
  8. 11. Blooms Overgrowth of algae
  9. 13. Species Species that can harm the ecosystem.
  10. 14. DNA makes a copy of itself.
  11. 16. growth Where the number of organisms keeps getting bigger and bigger.
  12. 18. selection Survival of the fittest.
  13. 22. To live.
  14. 24. Immunity
  15. 26. capacity The maximum number of living things can support.
  16. 27. Different species in an ecosystem.