Alayna Swanger 14 Extra Credit

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Across
  1. 2. A diagram showing evolutionary relationships.
  2. 6. Organisms that show traits of both ancient and modern groups.
  3. 7. When one species evolves into many different species.
  4. 8. An organism’s ability to survive and produce offspring.
  5. 12. The study of where organisms live around the world.
  6. 14. Structures with similar functions but different evolutionary origins.
  7. 16. When two species evolve in response to each other.
  8. 18. The age of a rock or fossil compared to others.
  9. 19. Human breeding of organisms for desired traits.
  10. 20. Organisms with helpful traits survive and reproduce more successfully.
  11. 21. When unrelated species develop similar traits.
Down
  1. 1. Traits gained during life that were once thought to be passed to offspring.
  2. 3. Layers of rock where fossils are found.
  3. 4. A trait that helps an organism survive in its environment.
  4. 5. Structures that have little or no function today.
  5. 9. The study of embryos and their development.
  6. 10. When related species become more different over time.
  7. 11. The idea that natural disasters caused major changes on Earth.
  8. 13. The idea that all species come from common ancestors and change over time.
  9. 15. The actual age of a rock or fossil in years.
  10. 17. Structures that are similar because they came from a common ancestor.