Question

What is Metamorphosis & how is it controlled?
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Answer 1

Answer:

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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Answer 2

Explanation:

In insects, growth and metamorphosis are controlled by hormones synthesized by endocrine glands near the front of the body (anterior). ... PTTH also stimulates the corpora allata, a retrocerebral organ, to produce juvenile hormone, which prevents the development of adult characteristics during ecdysis.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.