A) Insecta
B) Trematoda
C) Nemaroda
D) Polychaeta
Correct Answer: A
Solution :
Ecdysone or proihoracic gland hormone is secreted by prothoracic gland in insects. Ecdysone speed up metamorphosis in insects and other hormone- Juvenile hormone secreted from corpora allata in insects and responsible for larval characters.
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