Dr. Wigglesworth did not see molting in decapitated bloodsucking bugs if they were beheaded 1 hour after a blood meal. Why did those bugs molt?
A) ecdysone from the brain was unable to reach its target tissues
B) the prothoracic gland was removed during head removal
C) PTTH is attacked by antibodies in the blood meal
D) juvenille hormone is not able to diffuse that fast.
E) none of the above