Charles and Francis Darwin discovered that a. auxin is
Chapter 39, Problem 39.27(choose chapter or problem)
Charles and Francis Darwin discovered that a. auxin is responsible for phototropic curvature. b. auxin can pass through agar. c. light destroys auxin. d. light is perceived by the tips of coleoptiles. e. red light is most effective in shoot phototropism
Unfortunately, we don't have that question answered yet. But you can get it answered in just 5 hours by Logging in or Becoming a subscriber.
Becoming a subscriber
Or look for another answer