Question

When caterpillars are born how do they know that they have to build a cocoon and become a butterfly, without being taught anything by anyone?

Answer 1

Answer:

Caterpillars have a chemical called juvenile hormone in their bodies that is made by their brain. ... When the juvenile hormone level is low, the caterpillar wanders to find a site to make a chrysalis (or a cocoon if it is a moth), then it becomes a pupa and not another caterpillar stage

Explanation: