mention any two. Nylon and polyester on the … Selective breeding is a process of (a) selecting the offsprings with desired properties. Top Answer. Silk is a natural fibre which is obtained from an insect (called silk moth). Silkis a fine, strong, soft and shining fibre produced by silkworms in making their cocoons. Answer– True (d) Silk fibre is obtained from the stem of a plant. A female silk moth lays hundreds of eggs at a time.The eggs of silk moths are stored. After harvesting, the stalks of … Q32: Name the fibre having properties similar to that of silk. Question 18. The rearing of silkworms, processing of cocoons to obtain silk fibres and making of silk fabrics (silk cloth) from silk fibres. Examples of natural fibers are cotton and silk whereas examples of synthetic fi… After about 25 to 30 days, the silkworms stop eating and get ready to spin cocoons.The silkworms climb the twigs placed near them and spin cocoons of silk fibres. The process of taking out silk fibres from the cocoons for use as silk is called reeling. The pile of cocoons is used for obtaining silk fibres. The cocoon is made of a thread of raw silk from 300to about 900m(1,000to3,000ft)long. In India, cotton is … Question 6 Explain the process of making yarn from fibre. What is sericulture? NCERT Solutions for Class 10 हिन्दी – क्षितिज – Chapter 3 – सवैया, कवित्त – देव, NCERT Solutions for Class 10 हिन्दी – क्षितिज – Chapter 2 – राम लक्ष्मण परशुराम संवाद, NCERT Solutions for Class 10 हिन्दी – क्षितिज – Chapter 1 – पद, Economics Chapter 5 Consumer Rights – Notes & Study Material, Economics Chapter 4 Globalisation and The Indian Economy – Notes & Study Material. The process by which silk thread is separated from the cocoon is called reeling the silk. This is because if the silkworm (as pupa) is allowed to mature into a silk moth, then the fully formed silk moth secretes a liquid to dissolve a part of silk of the cocoon to break it so as to come out of it and fly away. (Paper is also made of cellulose obtained from wood pulp). Question 5 Name two items that are made from coconut fibre. Mulberry silk is soft, lustrous (shiny) and elastic, and can be dyed in beautiful colours Thus. Author of this website, Mrs Shilpi Nagpal is MSc (Hons, Chemistry) and BSc (Hons, Chemistry) from Delhi University, B.Ed (I. P. University) and has many years of experience in teaching. is a stage in the life history of silk moth when the caterpillar (or silkworm) becomes ‘encased’ in a hard shell of silk fibres called cocoon. When the eggs hatch, silkworms (larvae or caterpillars) come out of eggs. Silk is formed in liquid form in the two glands in the silkworms’s head. Answer: Jute fibres are obtained from the stems of the jute plant. Answer: a) True b) False c) False d) True e) True f) False g) False. The silk obtained from the cocoons of mulberry silk moth is called mulberry silk. In order to obtain silk, mulberry trees are cultivated, silkworms are reared and their cocoons are collected to get silk fibres. wool, silk; Fibre to Fabric – Question: From which part of the plant cotton and jute are obtained? What is the nature of silk fibre obtained from the cocoon of mulberry silk moth? The larva (or caterpillar) and pupa stages in the life history of a silk moth are totally different in appearance from the adult silk moth. All the cocoons are collected at one place. (b) Animals fibers are silk and wool . Filed Under: Class 7, Fibre to Fabric, Science Tagged With: artificial silk, cocoon, life history of silk moth, mulberry silk, natural silk, production of silk, pupa, rayon, Rearing of Silkworms, reeling, sericulture, silk, silk yarn, silkworm, varieties of silk. How is Silk … Animal fibre: Silk and wool are animal fibre. The fibres are very fine and lustrous, about 10μm(0.0004in)in diameter. Explanation: a)& b) Process of making yarn from fibres is called spinning. Answer: Ropes and jute bags. Natural silk is an animal fibre. The larvae of silk moth are called caterpillars or silkworms. The long silk fibres are obtained by unwinding the threads from cocoons. is formed in liquid form in the two glands in the silkworms’s head. Answer-False Q3. Natural silk is an animal fibre. Answer: Yarn is a kind of long … Silk fibres are converted into silk yarn which is used f… Examples: cotton, jute, silk, wool. This helps in separating out the silk fibres. Some of the varieties of silk are : Mulberry silk; Tassar silk ; Mooga silk ; Kosa silk; and Eri silk. Silk fibre is obtained from (a) fleece of sheep (b) cotton ball (c) cocoon (d) shiny jute stalk. Question 2 What are the characteristics of silk fibres obtained from the cocoons of  silk moth? 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