Evolution

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Across
  1. 4. causes variation at the genetic level
  2. 7. Darwin's theory of how changes occur in organisms over time
  3. 9. long periods of time with no change followed by rapid change
  4. 10. evolution where multiple species come from a common ancestor
  5. 11. useless parts
  6. 13. appearance of new species after mass extinction
  7. 15. same structure different function
  8. 16. type of mutation that has no affect on the survivability of the organism
Down
  1. 1. when organisms select mates with desirable traits
  2. 2. development of new species due to reproductive isolation
  3. 3. evolution happens slowly over time
  4. 5. farmers practice ________ selection to improve their livestock or crops
  5. 6. the evolution of similar adaptations in two different species
  6. 8. random loss of variation in small populations
  7. 12. same function but built differently
  8. 14. gives direct evidence that species change over time