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In the silk worm, if no juvenile hormone (JH) is present when it moults, it will

1. die
2. moult into another larval stage
3. moult into pupa
4. moult into an adult

Correct answer: moult into pupa

Solution

Juvenile hormone maintains larval characteristics during molts. When JH is absent in the silkworm, the insect can no longer remain in a larval stage, so it transitions into the pupal stage.

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