In cockroach, larval and nymphal characters are maintained by

Options

A. ecdysone
B. salivary glands
C. parotid gland
D. juvenile hormone

Answer

D

Explanation

Juvenile hormone is produced by corpora allata in insects it favours the development of juvenile characteristics During larval life, this hormone predominates and each moult yields another larger juvenile and keeps the larva in immature condition or maintain juvenility