Question

describe the life history of silk moth briefly. make skethes of the two stages in the life history of silk moth which are directly related to the productions of silk

Answer 1

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Here is your answer,
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The four stages in the life-cycle of a silk moth -egg, caterpillar, pupa, and adult .

The female silk moth lays hundred of eggs on the mulberry leaves. The larvae that hatched out in 3-5 days are called caterpillars.

Caterpillar feed on mulberry leaves and grow in size. When the caterpillar is ready to enter the pupal stage, it stops feeding and its salivary gland starts secreting a sticky fluid called fibroin. This fluid hardens on exposure to air and forms a long thread of silk. This thread gets wrapped around it's body to form a ball-like structure called cocoon. At this stage, the caterpillar becomes a pupa.

The silk moth continued to develop inside the cocoon and the young moth flies out.

At the end of pupal stage, the silk moth cuts open the cocoon and the young moth flies out.

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