Question

Name the hormone that regulates metamorphosis in insect.​

Answer 1

The process of growth and metamorphosis in insects is controlled by secretions of prothoracic glands and corpora allata which are ecdysone and juvenile hormone respectively. Ecdysone stimu­lates growth and shedding of the old cuticle of the larva and the new cuticle is formed beneath the old cuticle.

Answer 2

Insect molting and metamorphosis are controlled by two effector hormones: the steroid 20-hydroxyecdysone and the lipid juvenile hormone (JH) (Figure 18.21). 20-hydroxyecdysone initiates and coordinates each molt and regulates the changes in gene expression that occur during metamorphosis.

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