Question

what yields silk fibres?​

Answer 1

The best-known type of silk is obtained from cocoons made by the larvae of the silkworm Bombyx mori reared in captivity. Rearing of silks is called sericulture. Degummed fibers from B. mori are 5-10 μm in diameter.

Answer 2

Answer:

Silk fibers is a natural protein fiber mainly consists of fibroin, which is a protein that certain types of insect larvae secrete to make cocoons.

Explanation:

• Silk is a luxurious silk moth spun from moth cocoons.
• These cocoons are spun to make endless silk threads with natural gum that gives an attractive luster. S
• ilk fiber is made from the protein produced by the silk moth Bombyx Mori.
• This protein is called sericanin and is produced only by this insect.
• It is secreted as a liquid from the two glands on the sides of the worm.
• These glands produce a protein called sericin, which is converted into liquid silky plasma.
• The fluid moves with the worm's many small tubing systems and features a series of small, thin cones that can be opened and closed, releasing the exact amount of silky fluid.
• Threads are collected by a row of sticky hair on the head of the worm.
• A few minutes after the first blow, the larva rotated the cocoon in the air.
• This is an amazing engineering feat that actually propels in the air when the shell is solidified.
• The moths then emerge from the cocoon and shed the last, now useless outer layer of insects.