Question

A. Which stage of the processing of silk is shown in the picture ?

B. Why are the cocoons boiled during the processing of silk ?​

Answer 1

Answer:

1. The caterpillar or larvae are hatched from the eggs of the silk moth. The silkworms feed on mulberry leaves and give rise to pupa. In the pupa stage, a weave is netted around by the silkworm to hold itself. After that it swings its head, spinning a fibre made of a protein and becomes a silk fibre.

2. During boiling, some amount of water enters the cocoon cavity and makes it soft. This helps in separating the fibres from cocoon during the reeling process. ... Due to hot water, pupa dies and does not emerge out of cocoon.

Answer 2

Explanation:

a) The caterpillar or larvae are hatched from the eggs of the silk moth. The silkworms feed on mulberry leaves and give rise to pupa. In the pupa stage, a weave is netted around by the silkworm to hold itself. After that it swings its head, spinning a fibre made of a protein and becomes a silk fibre.

b) During boiling, some amount of water enters the cocoon cavity and makes it soft. This helps in separating the fibres from cocoon during the reeling process. ... Due to hot water, pupa dies and does not emerge out of cocoon.