Which of the following statements is true?

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(D) The correct answer is $(d)$.$1$. The larval stage of the moth,known as the caterpillar,possesses specialized silk glands that secrete a sticky pro

Vedclass · Accepted Answer

Both $(b)$ and $(c)$

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(D) The correct answer is $(d)$.$1$. The larval stage of the moth,known as the caterpillar,possesses specialized silk glands that secrete a sticky proteinaceous fluid.$2$. This fluid is extruded through a structure called the spinneret,which hardens upon contact with air to form a long,fine silk thread.$3$. The caterpillar spins this thread around itself to form a cocoon.$4$. In the commercial production of silk,the cocoons are boiled in hot water to kill the pupa inside and to soften the sericin (the glue holding the silk fibers together),allowing the silk thread to be unwound.

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