Name the hormone responsible for development of caterpillar to moth.

Juvenile hormone(JH)

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Adrenaline

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Thyroid hormone

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Prothoracicotropic hormone (PTTH)

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Solution

The correct option is A Prothoracicotropic hormone (PTTH)
Prothoracicotropic hormone (PTTH) is secreted by cells present in the brain of the larva.
Prothoracicotropic hormone (PTTH) helps in regulating the production and release of ecdysone, a steroid hormone that stimulates moulting and metamorphosis. Hence, the development of caterpillar to moth which is essentially what metamorphosis is about requires PTTH.
So, the correct option is 'Prothoracicotropic hormone (PTTH)'.

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