what is the meaning of "the mouth of the caterpillars secrets fibre made of a protein with hardness on exposure to air and becomes silk fibre".
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The protein fiber of silk is composed mainly of fibroin and is produced by certain insect larvae to form cocoons. The best-known silk is obtained from the cocoons of the larvae of the mulberry silkworm Bombyx mori reared in captivity (sericulture).
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it means jo caterpillar hota h vo jab mulberry leaves khata h to uske mouth se ek tarah ka liquid nikalta h jo protein se bna hota h or jab vo liquid air ke contact me ata h tab vo silk fibre me change ho jata h..
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