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Biotechnology and Its Applications
Question
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In which stage of its life cycle, the silk moth begins to produce silk fibre?

  • 3rd instar larva

  • 4th instar larva

  • 5th instar larva

  • Pupa

Answer

D.

Pupa

The caterpillar larva hatches from egg of silkmoth. The full grown caterpillar larva grows into pupa. Its salivary glands now secrete a sticky fluid through a narrow pore of its spinning apparatus called spinneret situated on hypopharynx. The sticky substance turns into the fine long and solid thread of silk.

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