A) corpora cardlacum
B) prothoracic gland
C) corpora allata
D) neurosecretory hormone
Correct Answer: B
Solution :
Moulting hormone (ecdysone) is secreted by prothoracic gland. These glands are paired, bilateral sheet of cells in the thorax. In Periplaneta, this endocrine gland is X-shaped. This gland is stimulated by prothoracicotropic hormone. Ecdysone, by causing transformation from larval to pupal stage, initiates post embryonic growth in insects.
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