Neelima was concerned about killing the larvae by boiling the cocoon, while obtaining silk. Justify this process to Neelima by choosing the correct reasons from the given options.

To avoid breakage of silk strand

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To strengthen the silk

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To soften the cocoon

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To remove dirt and grease

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Solution

The correct options are
A To avoid breakage of silk strand
C To soften the cocoon
The cocoons of silkworms are boiled while obtaining silk. This is done to kill the larvae before it comes out of the cocoon so that the continuous silk strand is not broken. Boiling also softens the gum that binds the silk fibres to the cocoon.

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Choose the option that correctly arranges the statements given below in order with respect to silk worm rearing.

I.Eggs are bought and incubated under controlled conditions

II. Silk cocoons are boiled

III. Silk fibres are extracted

IV. Egg hatch into larvae

V. Larvae weave a cocoon around themselves to metamorphose

VI. Larvae are fed mulberry leaves making them grow

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