Evolution

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Across
  1. 9. the amount of time it takes for half of a specimen's Carbon to decay
  2. 11. formation of a new species
  3. 14. unrelated organisms develop similar characteristics
  4. 16. A population of interbreeding organisms capable of producing fertile offspring
  5. 18. structures which are not used but still there (tiny)
  6. 19. previously related organisms become less alike
  7. 20. remains/tracing of a once-living organism
  8. 21. Age determined through analysis of chemical and physical properties of rocks/fossils
Down
  1. 1. the study of the history of life on earth
  2. 2. selection darwin came up with evolution because of
  3. 3. form of an element with the same no. of protons but different no. of neutrons
  4. 4. Structures similar in function, but not in the design
  5. 5. Determine the approx. age of a specimen
  6. 6. What is the evolution
  7. 7. the process by whereby organisms better adapted to their environment tend to survive and produce more offspring.
  8. 8. structures similar in design but not in function
  9. 10. many related species evolve from a single ancestral species
  10. 12. one mate selects the other
  11. 13. the process by which different kinds of living organisms are thought to have developed
  12. 15. of species darwins first book
  13. 17. the study of the development of different organisms