Evolution and Natural Selection

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Across
  1. 3. when an animal is getting used to the environment around you
  2. 5. similar in construction but are not inherited from a common ancestor
  3. 13. an early, pre-birth stage of an organism's development
  4. 15. anatomically similar structures inherited from a common ancestor
  5. 16. are structures that are the reduced forms of functional structures in other organism
  6. 17. when a small sample of population settles in a separate location from the rest
  7. 18. those less equipped would die
  8. 19. most common form of natural selection
  9. 20. more primitive features
Down
  1. 1. occurs when humans develop new breed of dogs or new strains of crop plants.
  2. 2. one species evolves to resemble another species
  3. 4. any change in the allelic frequencies
  4. 6. cumulative changes
  5. 7. Darwin's study of the distribution of plants and animals around the world
  6. 8. an extreme version of a trait makes an organism more fit
  7. 9. occurs when a population declines to a very low number and then rebounds
  8. 10. are newly evolved features
  9. 11. allows organisms to be almost invisible
  10. 12. a process that splits a population into two groups
  11. 14. is a measure of the relative contribution that as individual trait makes to the next generation