Evolution Via Natural Selection

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Across
  1. 3. reasons that cause certain traits to be favoured over others
  2. 5. rocks formed by pre-existing rocks and past living organisms
  3. 6. when a body of water has excess nutrients
  4. 11. evolution caused by the accumulation of traits over time
  5. 12. reproductive success and how well an organism adapts to environment
  6. 13. when one extreme phenotype is favoured over others
  7. 14. a part of an organism that became functionless over time due to evolution
  8. 15. when a genotype does not change from generation to generation
Down
  1. 1. a form of natural selection where both extremes are favoured over the mean
  2. 2. different features that serve the same functions in organisms with a common ancestor
  3. 4. similar features that serve different functions in organisms with a common ancestor
  4. 7. a fossil in that shows an organism in the middle of evolution
  5. 8. a supercontinent
  6. 9. variety of life
  7. 10. a rock that shows a specific time on Earth