Evolution Vocab Crossword

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Across
  1. 2. proof of the existence of something that was once here but isn't anymore
  2. 5. change in frequency of genes in a population
  3. 7. the study of very early forms of organisms (embryos)
  4. 8. process of a species changing over time
  5. 9. the ability to survive and reproduce in your environment
  6. 10. selects for traits that improve mating success
  7. 12. pre-______ is before mating occurs
  8. 15. permanent disappearance of a species from earth
  9. 16. the crossing of 2 different species
  10. 17. populations become isolated when there is no gene flow
Down
  1. 1. organisms struggle for limited resources
  2. 3. the movement of alleles between populations
  3. 4. traits being naturally selected to help a species better survitsn their environment
  4. 5. total number of genes on a particular population or species
  5. 6. current distribution of species around the earth
  6. 11. ______ isolation occurs in the SAME area
  7. 13. a random change in the DNA of a gene
  8. 14. ______ organs: organs in an animal that are now just traces of what they once were (ex. whale with a femur)
  9. 17. ______ isolation occurs in DIFFERENT areas