How are the threads on the outside of the cocoon?
Answer:
Rough
Discussion:
This caterpillar has special glands which secrete liquid silk through its lower lip. The liquid produced later hardens to form tine strands. The caterpillar makes its cocoons using these strands. The threads on the outside of the cocoon are rough, while those
inside are soft and smooth. Some fully spun cocoons are heated. This kills