(w) Cocoon is generally formed by
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Explanation:
Cocoon formation starts after copulation when ovary matures. A membrane is secreted around the clitellum by membrane secreting glands. ... The structure now is called cocoon. Inside the cocoon one sperm get fertilized with ova to form zygote. Young worm is developed inside the cocoon and comes out after 2-3 weeks.
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Explanation:
When a silkworm has eaten enough, it constructs a cocoon made out of silk fibers, and inside that cocoon it turns into a pupa. After many days, a fully formed adult silkworm moth emerges through a spit-soaked opening in the bottom of a cocoon.
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