IELTS writing SAMPLE

How To Draw Life Cycle Of Silkworm Step By Step

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Video Drawing of life cycle of silkmoth

How do you draw a silkworm step by step?

You can refer to the simple step-by-step drawing guide below Start by drawing the head in an irregular oval. Draw eyes and mouth by creating a dot at the bottom and a dot at the top right. Draw the body of the worm part at a time. Draw foot or foot, one out of each section except the middle one. To finish, draw the tail.

What are the stages of life cycle of silkworm?

Silkworm has four stages in its life cycle viz., egg, silkworm, pupa and moth.

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What are silkworms Class 7?

The larva (or caterpillar) of a silk moth which produces silk is called silkworm. (1) The female silk moth lays eggs on the leaves of a tree (such as mulberry tree) (2) The eggs hatch to form worm-like larvae. The larvae of silk moth are called caterpillars or silkworms.

How do you draw silk?

1. How to Draw Silk Fabric Start with an oval—this will be the top of the cylinder the fabric is laid upon. Draw another, bigger oval below. Draw the direction of the fabric going down the cylinder. Draw the edge of the fabric and plan its folds. Draw the edges of the fabric as suggested by the fold line.

In which stage of life cycle does silkworm produce silk?

Complete answer: – A weave is netted around by the silkworm in the pupa process to hold itself. After that, it swings its head and spins a protein- based fiber and becomes a silk fiber. – A protective coating around the pupa is created by many caterpillars and this covering is known as the cocoon.

What stage do silkworms get silk?

Thus the correct answer is (B) Larva secretes silk.

What is cocoon in life cycle of silkworm?

Cocoon is the stage in which the larva spins silk threads around it, to protect itself from its predators. The larva traps itself inside the cocoon in order to pupate. The color of the cocoon varies, depending upon what the silkworm eats. It can range from white to golden yellow.

How do silkworms spin cocoon?

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The larva has a small spinneret on its lip, through which the silk emerges. The single strand of silk that forms the cocoon is about one mile long! The silkworm moves its head in figure 8 patterns as it spins the cocoon. The silkworms spin their cocoons inside these frames.

How is cocoon formed by silkworm?

The silkworms secretes a very fine filament made of fibroin protein from two glands on its head which solidifies upon exposure to air and becomes silk fibres. Through movement of head from side to side in the form of figure of eight, the silkworm completely covers itself forming the cocoon.

What is the stage of silkworm after larva?

life cycle of a silkworm can be primarily divided into 4 stages-namely the egg (ovum), larva, pupa, and adult (moth). The number of days required for each stage is 10 to 14 days for the egg, 20 to 25 days for the larva, 10 to 14 days for the pupa, 7 days for the adult and 50 to 60 days for 1 cycle ( Fig.

How was silk discovered?

According to Chinese legend, Empress His Ling Shi was first person to discover silk as weavable fibre in the 27th century BC. Whilst sipping tea under a mulberry tree, a cocoon fell into her cup and began to unravel. From there, silken garments began to reach regions throughout Asia.

How do you make satin?

Originally, satin was made using silk, which is a long, continuous thread pulled from a silkworms cocoon. Modern satin can also be made from polyester and rayon, both of which can be manufactured to form long filaments.

How is silk made step by step?

How to Make Silk in 6 Steps Raising silkworms & harvesting cocoons to make silk threads. Extracting the silk threads. In order to unravel the silk thread, cocoons are placed into boiling water. Step 3: Dyeing. Next, it’s time to dye the silk. Step 4: Spinning. Ikat (another kind of dyeing) Weaving. 2 Comments.

How is silk 7th made?

In order to obtain silk, mulberry trees are cultivated, silkworms are reared and their cocoons are collected to get silk fibres. When the eggs hatch, silkworms come out of the eggs. The silkworms are fed mulberry leaves. After 25-30 days, the silkworms stop eating and get ready to spin cocoons.

How do you start a silkworm farm?

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6. Requirements For Sericulture Farming Or Silk Business Land: This is the most important element to start the business. Mulberry foliage: There are various categories like Kanva-2, S-13, S-34, etc. Silkworm rearing home: It is the place where silkworms are reared to produce cocoons.

Which are the four stages through which silkworm moth passes during its life cycle?

Silkworms go through four stages of development, as do most insects: egg, larva, pupa and adult: the adult (imago) stage is the silkworm moth.

Which of the following stages in the life history of a silkworm produces silk fibre?

In pupa stage the silk fiber is only obtained, but actually it is produced by larva and in question it is asked which stage produces fiber. Hence, the answer is ‘C”.

The two stages in the life history of the silk moth which are directly related to the production of silk: => Spinning of cocoon of silk threads around caterpillar. => Changing of caterpillar into pupa.

What is the correct sequence of the life cycle of silkworm a egg B larva C adult D pupa?

Silk moth → pupa → egg → silkworm.

Which is the feeding stage in the life cycle of silkworms?

The caterpillar or larvae are hatched from the eggs of the silk moth. The silkworms feed on mulberry leaves and give rise to pupa. In the pupa stage, a weave is netted around by the silkworm to hold itself. After that it swings its head, spinning a fibre made of a protein and becomes a silk fibre.

How long does it take for a silkworm to make a cocoon?

The worms can begin to spin cocoons at 28 days old when they are between 2 1/2 and 3 inches long (usually takes 2 to 3 days to complete cocoon). The moths usually emerge in 2 to 3 weeks and they do not eat or fly. They will usually mate and lay eggs and die within a week.

Why does the silkworm life cycle continue?

Silkworm moths do not eat or drink in the final stage of their life cycle, they mate; the female lays her eggs and the adult moths die. In areas where the seasons change, silkworm moths reproduce only once each year. In areas where the climate is always warm, the moth’s life cycle is ongoing.

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