Biology

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