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WB JEE Medical WB JEE Medical Solved Paper-2008

  • question_answer
    In which stage of its life cycle, the silk moth begins to produce silk fibre?

    A)  3rd instar larva                

    B)  4th instar larva

    C)  5th instar larva                

    D)  Pupa

    Correct Answer: D

    Solution :

                    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 rums into the fine long and solid thread of silk.


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