Biology Vocab

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Across
  1. 5. the descendants differ from their ancestors
  2. 7. allows an organism to better survive
  3. 8. natural disasters that have happened
  4. 10. study of fossils
  5. 12. processes that change uniformly
  6. 15. slow changes over a long period of time
  7. 16. similar structures in different organisms
Down
  1. 1. a measure of the ability to survive
  2. 2. organisms that are closely related
  3. 3. humans change a species
  4. 4. study of organism distribution
  5. 6. individuals who inherited traits
  6. 9. similar functions but not in origin
  7. 11. structures that no longer have a function
  8. 13. traces of organisms from the past
  9. 14. different physical traits from individuals