The purification and elucidation of the primary auxin's chemical structure were accomplished by: ...

The purification and elucidation of the primary auxin's chemical structure were accomplished by:
  a. Charles Darwin.
  b. Francis Darwin.
  c. Frits Went.
  d. Kenneth Thimann.
  e. F. Skoog.

Question 2

If you removed a coleoptile tip, placed it on an agar block for a period of time, and then placed the
  agar block to the side of the tip of a decapitated coleoptile, which of the following would happen next?
  a. The coleoptile would grow in a spiral pattern.
  b. The coleoptile would die.
  c. The coleoptile would not bend.
  d. The coleoptile would bend away from the side having the agar block.
  e. The coleoptile would bend toward the side having the agar block.