Question

protein secreted by the caterpillar​

Answer 1

Answer:

During the caterpillar phase, the worm wraps itself in a liquid protein secretedby two large glands in its head. Thissecreted protein hardens upon exposure to the air. The resulting filament is bonded by secondsecretion, sericin, which forms a solid sheath or cocoon.

Explanation:

This protein secreted by the caterpillar

Answer 2

Caterpillar builds a strong biological shield around them for their protection.

And for the formation of the shield they excrete a special protien which is actually in the form of thin silk fibres.

Silk fibres are nothing but a special type of dried protien which contains different amino acids and it is excreted by the caterpillars.