Evolution and Natural Selection

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Across
  1. 2. different bone structure but similar shapes
  2. 6. there is no more of the species alive
  3. 12. a change in a population's gene pool due to chance
  4. 14. mitosis
  5. 18. medicines don't work to kill off all the bacteria
  6. 19. a new species forms because of evolution
  7. 20. structures that are still present but don't serve a purpose anymore
Down
  1. 1. has no nucleus
  2. 3. how a species acts or responses to situations for their survival
  3. 4. bone and organ structure are similar
  4. 5. can lead to analogous structures
  5. 7. can lead to homologous structures
  6. 8. meiosis
  7. 9. the most successful of surviving and reproducing in their environment
  8. 10. evidence that life on earth has changed over time
  9. 11. physical features that change so they can best survive in the environment
  10. 13. when a few individuals from a larger group get isolated
  11. 15. has a nucleus and other membrane bound organelles
  12. 16. most reliable evidence for showing evolutionary relationships
  13. 17. a change in two or more species that are close associations