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