Question

The secretion of the sting of silkworm forms the silk fibre:
A. True
B. False

Answer 1

Hint: Silk is a natural protein fibre, some forms of which can be woven into textiles. The protein fiber of silk is composed mainly of fibroin and is produced by certain insect larvae to form cocoons.

Complete Answer:
Silk is obtained from the covers of the hatchlings of the mulberry silkworm Bombyx mori raised in captivity. Silk is delivered by the moth caterpillars. Silk is fundamentally created by the hatchlings of creepy crawlies going through complete transformation, yet a few bugs, for example, webspinners and rough crickets, produce silk for the duration of their lives. Silk creation likewise happens in hymenoptera (honey bees, wasps and ants), silverfish, mayflies, thrips, leafhoppers, bugs, lacewings, bugs, flies, and midges. Different kinds of arthropods produce silk, most eminently different 8-legged creatures, for example, arachnids.

The silkworms are taken care of with mulberry leaves, and after the fourth shed, they climb a twig put close to them and turn their cocoons. The silk is a ceaseless fiber containing fibroin protein, discharged from two salivary organs in the top of each worm, and a gum called sericin, which concretes the fibers. The sericin is eliminated by setting the cases in high temp water, which liberates the silk fibers and prepares them for faltering. This is known as the degumming process. The drenching in heated water additionally murders the silk moth pupa.

The silk moth is gathered from the mulberry leaves, these silk moths have shrouded themselves in the cover which is made of silk fiber. These silkworms are then boiled in water so all the dirt alongside silk strands get isolated. The sting of the silkworm when it gets evaporated structures silk filaments and is collected to shape the cover.

Therefore, correct answer for this question is A, i.e. True.

Note: The culturing of silkworms to obtain silk is called 'Sericulture'. There are a few business types of silkworms, Bombyx mori (the caterpillar of the homegrown silkmoth) is the most generally utilized and seriously examined silkworm.