Word parts

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Across
  1. 2. - the choice and use of words and phrases in speech or writing
  2. 5. - a vacuum tube in which the secondary emission of electrons
  3. 7. - a signature written by that person
  4. 9. - power
  5. 10. - a man that lives in water
  6. 12. - a spectacle involving swimming and diving
  7. 13. -a signature
  8. 14. - a system or network of ducts
  9. 15. - an explosion
  10. 17. - characterized by constant change, activity, or progress
  11. 18. - an account of a person's life written by that person
  12. 19. - the branch of biology
Down
  1. 1. - the exploitation of biological processes for industrial and other purposes
  2. 3. - admit someone formally to a position or organization
  3. 4. - an account of someone's life written by someone else
  4. 6. - self-loading
  5. 8. - to take away
  6. 10. - water
  7. 11. - a place with water that holds fish
  8. 16. - a device that focuses a camera or other piece of equipment automatically