Evolution and Natural Selection

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