please give all answerok thank yo
Answers
Explanation:
A.
1. Molting (moulting) is when one organism sheds something like hair, feathers, shells, or skin to make way for new growth.
2. A cocoon is a silky web spun around the larvae of many insects. Caterpillars emerge from their cocoons as beautiful butterflies. The word cocoon can also refer to a form a self-protection for humans. For some people, their house is a cocoon, a cozy retreat from which they can escape the world.
3.Sericulture, the production of raw silk by means of raising caterpillars (larvae), particularly those of the domesticated silkworm.
4. Degumming is the process for removal of phosphatides from crude soybean and other vegetable oils. The phosphatides are also called gums and lecithin. The latter term is also the common name for phosphatidyl choline, but common usage refers to the array of phosphatides present in all crude vegetable oils.
or
Degumming of silk involves the cleavage of peptide bonds of sericin, either by hydrolytic or enzymatic methods, and the subsequent removal of sericin from the silk fibroin. Hydrolysis of sericin can be carried out under neutral, alkaline or acidic conditions to give four fractions, each having different properties.
5.Silk containing sericin is called raw silk. The gummy substance, affording protection during processing, is usually retained until the yarn or fabric stage and is removed by boiling the silk in soap and water, leaving it soft and lustrous, with weight reduced by as much as 30 percent.
B.
6. These silkworms feed on the selected food plants and spin cocoons as a 'protective shell' to perpetuate the life. Silkworm has four stages in its life cycle viz., egg, silkworm, pupa and moth.
7. Sericulture. This is the term used to describe the process of gathering the silkworms and harvesting the cocoon to collect the materials. ...
Thread extraction. ...
Dyeing. ...
Spinning. ...
Weaving. ...
Finishing.
8. In short, there are four types of natural silk produced around the world: Mulberry silk, Eri silk, Tasar silk and Muga silk. Mulberry silk contributes around as much as 90% of silk production, with the mulberry silkworm generally being regarded as the most important.
9. India, being the second-largest producer of silk after China, produces all the four varieties of silk – Mulberry, Muga, Tasar (Tropical Tasar and Oak Tasar), and Eri.
10. Some larvae function in both dispersion and nutrition. Such young, called larvae, transform into the adult form by a process of metamorphosis. ... The larval forms of the various insects are called caterpillars, grubs, maggots, and nymphs. Echinoderms (e.g., starfish) also have larval forms.