Refer to the Figure Showing Moth Metamorphosis

question 200

Multiple Choice

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

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