A) Insects
B) Trematoda
C) Nematoda
D) Polychaeta
Correct Answer: A
Solution :
Ecdysone or prothoradc gland hormone is secreted from prothoradc gland in insects. Ecdysone speeds up metamorphosis in insects and other hormone. Juvenile hormone secreted is corpora allata in insects is responsible for larval characters.
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