Evolution

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Across
  1. 1. Units of heredity passed from parents.
  2. 6. Preserved remains of ancient life.
  3. 7. Humans choosing traits to pass on.
  4. 11. Two species evolving together.
  5. 12. The formation of a new species.
  6. 13. Random changes in gene frequency.
  7. 14. Study of how embryos develop.
  8. 15. The molecule that carries genetic information.
  9. 16. Evolution where unrelated species look alike.
  10. 17. A trait that helps an organism survive.
  11. 18. Similar function, different origin.
Down
  1. 2. Survival of the fittest in action.
  2. 3. Similar structures from common ancestors.
  3. 4. Traits chosen for mating success.
  4. 5. A useless structure from the past.
  5. 8. Reproduction with one parent only.
  6. 9. Simple cell without a nucleus.
  7. 10. Evolution where related species become different.
  8. 13. Movement of genes between populations.
  9. 14. When a species disappears forever.