Silk fibre is drawn from ____________ of silk moth.a)Hairb)Caterpillarc)Pupad)CocoonCorrect answer is option 'D'. Can you explain this answer?

Question

Answer

Following are the stages of production of silk:

1. The silk moth lays thousands of eggs.

2. The silk moth eggs hatch to form larvae or caterpillars, known as silkworms.

3. The larvae feed on mulberry leaves.

4. Having grown and moulted several times, the silkworm extrudes a silk fiber and forms a net to hold itself.

5. It swings itself from side to side in a figure '8' distributing the saliva that will form silk.

6. The silk solidifies when it contacts the air.

7. The silkworm spins approximately one mile of filament and completely encloses itself in a cocoon in about two or three days. The amount of usable quality silk in each cocoon is small. As a result, about 2500 silkworms are required to produce a pound of raw silk.

8. The intact cocoons are boiled, killing the silkworm pupa.

9. The silk is obtained by brushing the undamaged cocoon to find the outside end of the filament.

10. The silk filaments sec then wound on a reel. One cocoon contains approximately 1,000 yards of silk filament. The silk at this stage is known as raw silk. One thread comprises up to 48 individual silk filaments.

Answer

Answer is d

Answer

silk is obtain by cocoon of silkworm which secrete thread of silk around his body of about 1000-1200m long

Answer

B

Answer

Because silk obtained from silk worm it produce an egg and die if we heat the eggs the silk will come out

Answer

Cocoon

Answer

Silk fibre is obtained from cocoon of silk moth which is covered by silk threads.

Answer

Silk fibre is drawn from the cocoon of a silk moth.

Explanation:
Silk is a natural protein fibre that is produced by certain insects, such as silkworms. The silk moth, also known as the silkworm or Bombyx mori, is responsible for producing the silk fibre that is widely used in the textile industry.

The life cycle of a silk moth begins when the adult female moth lays eggs. These eggs hatch into caterpillars, which are also known as silkworms. The silkworms feed on mulberry leaves and grow rapidly, shedding their skin several times as they go through different stages of growth.

During the final stage of the silkworm's life cycle, it begins to prepare for metamorphosis. It spins a protective covering called a cocoon using silk fibres produced from special glands in its mouth. The cocoon serves as a shelter and protection for the silkworm during the pupal stage, which is the stage of transformation from a caterpillar to a moth.

The silkworm secretes a sticky liquid protein called fibroin while spinning its cocoon. The fibroin protein is then solidified upon contact with air, forming a continuous thread that makes up the cocoon. This silk thread is extremely fine and strong, making it suitable for various textile applications.

To obtain the silk fibre, the cocoons are carefully harvested before the silk moth can emerge. The cocoons are boiled in water to soften the sericin, a sticky substance that holds the silk fibres together. The softened sericin is then removed, and the silk fibres are unwound from the cocoon. Multiple silk fibres are combined to form a single silk thread, which can then be processed and woven into silk fabric.

In conclusion, silk fibre is drawn from the cocoon of a silk moth. The silk fibres are produced by the silkworm as it spins its cocoon, and these fibres are carefully harvested and processed to create the luxurious silk fabric that is highly valued in the textile industry.

Top Courses for Class 6View all

Science Class 6

Mathematics (Maths) Class 6

Social Studies (SST) Class 6

Science for Class 6 (Curiosity) - New NCERT

English Grammar for Class 6

Top Courses for Class 6

Top Courses for Class 6

Related Content

Class 6 Study Material

Class 6 Subjects

Competitive Examinations for Class 6

NCERT Books

NCERT Solutions

Reference Books for Class 6

Other Popular Exams

Company