intro to evolution

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Across
  1. 4. evolutionary biologist that stated that all species descended from a common ancestor
  2. 6. mode of selection in which traits that attract more mates are promoted
  3. 7. organisms that can produce viable offspring
  4. 9. organisms that are better adapted to environment survive longer and reproduce more
  5. 12. best possible explanation for a phenomenon based on available data
Down
  1. 1. mode of selection in which the environment selects traits to help organisms survive
  2. 2. driving force behind selection
  3. 3. alteration in structure/function of an organism that increases fitness
  4. 5. an organism's ability to survive and reproduce in its environment
  5. 8. the change of a species over time, at the genetic level
  6. 10. mode of selection in which humans select specific traits and encourage mating
  7. 11. states the observable facts in a phenomenon