Refer to the figure showing moth metamorphosis. If you experimentally block prothoracicotropic hormone (PTTH) in the fifth-instar larva, and then inject the larva with hormones, what hormone(s) would be both necessary and sufficient to trigger the larva to pupate?
A) Juvenile hormone
B) Juvenile hormone and prothoracicotropic hormone
C) Ecdysone
D) Ecdysone and juvenile hormone
E) Ecdysone and prothoracicotropic hormone

Question

Refer to the figure showing moth metamorphosis.   If you experimentally block prothoracicotropic hormone (PTTH) in the fifth-instar larva, and then inject the larva with hormones, what hormone(s) would be both necessary and sufficient to trigger the larva to pupate?
A) Juvenile hormone 
B) Juvenile hormone and prothoracicotropic hormone 
C) Ecdysone 
D) Ecdysone and juvenile hormone 
E) Ecdysone and prothoracicotropic hormone

Quizplus · Accepted Answer

The Answer of Refer to the figure showing moth metamorphosis.   If you experimentally block prothoracicotropic hormone (PTTH) in the fifth-instar larva, and then inject the larva with hormones, what hormone(s) would be both necessary and sufficient to trigger the larva to pupate?
A) Juvenile hormone 
B) Juvenile hormone and prothoracicotropic hormone 
C) Ecdysone 
D) Ecdysone and juvenile hormone 
E) Ecdysone and prothoracicotropic hormone

Refer to the Figure Showing Moth Metamorphosis