Natural Selection

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Across
  1. 4. Inherited traits that improve survival.
  2. 6. Naturalist who also came up with natural selection 20 years later.
  3. 7. Blending into the environment.
  4. 9. Total diversity of a population.
  5. 12. Differences in traits among individuals.
  6. 15. Change in a population due to chance alone.
  7. 16. Phrase that summarizes natural selection; coined by Herbert Spencer.
  8. 18. Principle named for two doctors; p + q = 1.
  9. 19. An extreme trait increases in a population.
Down
  1. 1. Change in genetic material.
  2. 2. The islands
  3. 3. Contest for space or resources.
  4. 5. Process that improves adaptations based on what the environment requires to survive.
  5. 8. Structures for protection; thorns, armor, spines, etc.
  6. 10. Resembling or behaving like something else.
  7. 11. Average trait increases over extremes in a population.
  8. 13. Measurement of how well an organism is adapted to an environment; determined by number of offspring produced.
  9. 14. Increased survivability in the presence of toxins.
  10. 17. Change in a population due to migration.
  11. 19. Two extreme traits increases in a population.