The Great Serum Race

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Across
  1. 2. in time order
  2. 5. to say you are sorry
  3. 8. study of land features
  4. 11. a picture
  5. 12. to create a routine
  6. 14. a comparison between two related words
  7. 18. a picture
  8. 19. measures earthquakes
Down
  1. 1. study of life
  2. 3. transmit messages
  3. 4. catch phrase used in advertising
  4. 5. a story of ones own life
  5. 6. relation to organisms and their environment
  6. 7. fancy writing
  7. 9. to improve and change
  8. 10. a grouping of written sentences
  9. 13. your signature
  10. 15. makes sense
  11. 16. a list of items
  12. 17. study of the human mind