Name: Story of Wool
Uploaded: 2019-07-19
Duration: 3 min 10 s
Description: Let's see how we use wool in our daily lives. Follow this video to see how sheep get a 'haircut', and we get wonderful sweaters that keep us warm!

Question

Draw a labelled diagram to show the life cycle of silk moth. At which stage is silk fibre produced?

Accepted Answer

The diagram of the life cycle of a silk moth:

The silk moth goes through four distinct stages during its life cycle, from egg to adult moth. The entire cycle does not take more than a couple of months.

The female silk moth lays hundreds of eggs that hatch into caterpillars or also called larvae. These larvae are voracious eaters and consume mulberry leaves. When they are fully grown, they start spinning cocoons around themselves. The larvae inside a cocoon turn into a pupa and develop inside the case. The pupae develop into adult moths and emerge from the cocoons about three weeks later.

But for the production of silk, the cocoons are boiled in water to kill the insect inside and soften the coating. The silk fibre is then pulled out from this cocoon.

Draw a labelled diagram to show the life cycle of silk moth. At which stage is silk fibre produced?

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