Question

covering of silk fibre

Answer 1

Hey mate here is your answer

During these movements of head, the caterpillar secretes fibre made of a protein which hardens on exposure to air and becomes silk fibre. The caterpillar completely covers itself by silk fibres and turns into pupa. This covering is known as Cocoon. ... The silk yarn (thread) is obtained from the cocoon of the silk moth.

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Answer 2

The caterpillar completely covers itself by silk fibres and turns into pupa. This covering is known as Cocoon. ... The silk yarn (thread) is obtained from the cocoon of the silk moth.

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