Science MCQ (1 Marks)

Bharat Merino is the high quality wool of same property obtained from the sheep breed produced at Central Sheep and Wool Research Institute, Avikanagar in India. So in India Bharat merino is the best quality of wool.
The reason being its good fiber diameter, crimp, yield, color, and staple strength.

There are some famous breeds of sheep which found in India. Such as, Lohi is famous for “Good quality of wool”. Marwadi is famous for “Coarse wool”. Nali is famous for “Carpet wool” and pathanwadi is famous for “Hosiery”.

Cocoon is one of the stage of life cycle of silkworm. Fleece of sheep gives wool, cotton ball gives cotton and jute stalk gives jute fibre.

Rest of the options given here are obtained by killing animals, but wool is produced from shearing of skin of sheep.

It is an animal fibre.

Shearing is the process in which fleece of sheep with thin layer is removed.

Sericin is the gummy substance that holds two strands of fibroin of silk fibre together.

Cow

Among the natural fibres, jute ranks next to cotton in terms of production. Jute is a cellulosic fibre, under the category of bast fibres and its cultivation is almost as old as human civilization. Jute leaves are rich in iron, eating them regularly can help to improve the condition. Jute, an annual herbaceous plant, is mainly cultivated in South and South East Asia.

Reeling of silk is the process of taking out threads from the cocoon for use as silk.

Sericulture, also known as silk farming, is the process of rearing silkworms in order to produce silk.

The process of taking silk threads from cocoon.

Patanwadi

In ancient times, barks and big leaves of trees or animal skins and furs were used by people to cover themselves.
The first material used for clothing is the natural fibres obtained from both plants and animal sources. These include cotton, flax, wool, leather, silk, etc.

Sericulture

“Silk fibres are then spun into silk threads, which are woven into silk cloth by weavers”.

Rayon or artificial silk, nylon, and acrylic represent fibre. Polyester and cotton are also examples of fibre.

Sheep are herbivores, which means their diet does not include meat. They typically eat seeds, grass and plants.

Silk is a protein fibre and usually burns readily, not necessarily with a steady flame, and smells like burning hair. The ash is easily crumbled. Silk samples are not as easily extinguished as cotton or linen.

None of these

The process of selecting parents for obtaining special characters is called selective breeding.

Anthrax is bacterium which causes fatal’s blood diseases.

Angora wool.

Anthrax disease is caused by Bacillus anthracis. It causes cutaneous infection.
This disease is common in dock workers who carry loads.
The Rhizobium is fungi and the Clostridium coliform are bacteria related.

Kashmiri shawls

The caterpillar silkworm secretes fibre made of a protein which get hardened on being exposed to air and become silk fibre. Silkworm completely covers itself by silk fibres and this covering is called cocoon which is further processed to obtain silk fibres.

Bombyx mori

Angora wool is used to make baby blanket. Camel wool is used to make woollen carpet. Sheep wool is used to make woollen sweater.

Sheep, goat, Camel, Yak, etc. bear hair of two different types coarse hair and fine soft hair. Fine soft hair is found close to the skin in these animals. The fine soft under hair is called fleece. Fibre for wool is obtained from the fleece (hair) of such animals and hence such animals are called wool-bearing animals.

Caterpillars eat day and night and increase enormously. India is the place where mostly sheep are reared for getting wool. Protein makes the silk worm. Morus Alba is scientific name of mulberry.

The process of selecting parents for obtaining special characters is called selective breeding.

Mulberry leaves.

Protein

Moth is the silkworm under development inside a cocoon. Mulberry, Tassar and Mooga are varieties of silk produced by different rearing practices.

Woolly dog.

Llama and Alpaca are domesticated South American camelids. The wool produced from llama is very soft and lanolin free. Alpaca is known for its fibers used for knitted and woven items, similar to wool.

Sericulture is the rearing of silkworm to obtain silk fibre. Sericulture means ‘silk farming’.

Husk and bones are not used in fibre making, all the rest material given in the options are used in making fibre.

Moth silk.

For obtaining silk, moths are reared and their cocoons are collected to get silk threads. keep eggs under hygienic conditions and under suitable conditions of temperature and humidity.
The eggs are warmed to a suitable temperature for the larvae to hatch from eggs.

Both the statements are correct statements.
Rearing of silkworms for obtaining silk is called sericulture.
Sericulture is the whole process of obtaining silk starting from silk moth.

Polyester

it is part of silk extraction.

Silk

Yak wool

Rampur Bushair is the only breeds of sheep is found only in Uttar Pradesh and Himachal Pradesh. And rest of others, found in different part of the countries.

Reeling of silk is the process of taking out threads from the cocoon for use as silk.

Anthrax.

Removal of fleece of sheep is called shearing.

The process of fibre making involves a lot of physical hazards such as physical injuries during the process, heat, noise, dust, etc.

Sericulture is a practice of rearing of silkworms for obtaining silk while silviculture is a practice of developing and caring forests.

Yak fiber wool is common in Tibet and Ladakh and Angora wool is obtained from angora goats, found in hilly regions such as Jammu and Kashmir. Wool is also obtained from goat hair.

All of these

Moth silk

Sericulture is the technique in which the rearing of silkworms to gather silk is done.

Fleece of sheep.

Removal of fleece is called sheep shearing, separating hair of different textures is called sorting, washing wool to remove grease is called scouring and rolling of sheep fibre into yarn is called rolling.

Woolly dog.

The fibres obtained from animals are made up of proteins.

Shearing.

Herbivores

Pisciculture: Also known as fish farming, it is the rearing, breading, and transplantation of fishes.
It is the rearing of silkworms in order to obtain silk from their pupa.
It is the planting of two different crops in the same field at different times. It helps to replenish lost minerals.
Arboriculture: It is the cultivation and management of trees, shrubs, perennial woods, etc.

Reeling

There are many animals that bear a thick coat of hair on their body which gives wool to us.
For example sheep, goats, camel, yak, etc.

The woolen industry in India is small and is located in the states of Jammu and Kashmir, Himachal Pradesh, Arunachal Pradesh, Uttarakhand, Sikkim, Haryana, Punjab, Rajasthan and Gujarat.

Kashmir

Silk protein consists of “Sericin” and “Fibroin” mainly. Fat and cellulose are not present in silk. Nylon is a synthetic fibre.

Kashmir.

Pashmina

Longer fibres

The rearing of silkworms for obtaining silk and their rearing, breeding is called “Sericulture” while “Silviculture” is a practice of developing and caring forests.

Silkworm lay their eggs on the mulberry leaves and not on any leaves in order to provide the diet for newly born silkworms.

Selecting the parents with desired properties.

Fiber particles can deposit in the lungs. This occupational disease is also known as silicosis.
Silicosis is a form of occupational lungs disease caused by inhalation of crystalline silica dust and is marked by inflammation and scarring in the form of nodular lesions in the upper lobes of the lungs.
It is a type of pneumoconiosis.

 Silkworm, its larvae are fed with mulberry leaves, and, after the fourth moult, they climb a twig placed near them and spin their silken cocoons.
This process is achieved by the worm through a dense fluid secreted from its structural glands, resulting in the fibre of the cocoon.

The female silk moth lays eggs, from which hatch larvae which are called caterpillars or silkworms.

Pashmina a very fine quality of wool is obtained from goats.

Sheep wool.

 The silkworm is a caterpillar and a larva. The female silk moths lay eggs that hatch into larvae. Larvae of female silk moths are also known as silkworms or caterpillars.

Disease

China.

For obtaining silk, moths are reared and their cocoons are collected to get silk threads. A female silk moth lays hundreds of eggs at a time. The eggs are stored carefully on strips of cloth or paper.

Animals fibres are those which largely consist of protein. Some of the animals have the property to provide such kind of feather or fur which can be used to produce wool. All the given examples are animal fiber use to form a different type of wool.

Shearing.

Wool comes from sheep, goat, yak and some other animals. In India, mostly sheep are reared for getting wool.

Leather is a durable and flexible material created by tanning animal rawhide and skins. The major ingredient of leather is Collagen.

Animals gives us wool and silk fibres.

Rearing of silk worms

Sorter’s disease is caused by anthrax.

Although sheeps are associated with the production of wool, there are certain goats that produce wool fibre. Fibres such as Mohair from Angora goats, cashmere wool from many breeds of goats. Llamas produce very soft and lanolin free wool.

Silk is a natural protein fiber, 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.

None of these

Protein.

Sericulture is a practice of rearing silkworms for obtaining silk while silviculture is a practice of developing and caring forests.

Cellulose.

Moth is an insect while other three are the animals with fur which produce wool.

​​​​​​Bombyx mori is the scientific name of the silk moth. The silkworm is actually the larva or caterpillar of a silk moth. The silk moth commonly lays its egg on Mulberry true. The scientific name of Mulberry Tree is Morus alba.

India is the place where mostly sheep are reared for getting wool.

Shearing

Moriculture, Sericulture are the two terms which are related to silk production.

The process of taking silk thread from cocoon

Camel

Pupa

Silk protein consists of sericin and fibroin mainly. Fat and cellulose are not present in silk. Nylon is a synthetic fibre.

Reeling the silk

The female silk moth lays eggs, from which hatch larvae which are called caterpillars or silkworms.

Rayon is a natural fibre.

Sericulture.

Silk protein consists of “Sericin” and “Fibroin” mainly. Fat and cellulose are not present in silk. Nylon is a synthetic fibre.

Animals.

For obtaining wool, sheep are reared. Their hair is cut and processed into wool. The quality and texture of the fibres obtained from them. Certain breeds of sheep have thick coat of hair on their body which yields good quality wool in large quantities.

Sericulture is the rearing of silkworm to obtain silk fibre. Sericulture means “Silk farming”.

Mulberry leaves

Woollen shawl.

Woolly dog.

China.

Woollen shawl

Blood pressure is due to the disorder of health.

The woolen industry in India is small and is located in the states of Jammu and Kashmir, Himachal Pradesh, Arunachal Pradesh, Uttarakhand, Sikkim, Haryana, Punjab, Rajasthan and Gujarat.

Rearing

Mulberry leaves

Sericulture is a process of rearing of silkworm to obtain silk.

Occupational hazards normally develops over a period of time at workplace. Such hazards are may be due to exposure to the disease causing bacteria or viruses, chemicals, dust, etc. at workplace.

Hair traps a lot of air and provides warmth to the body.

Apiculture is the scientific method of rearing of honeybees.

Cocoon is one of the stages of life cycle of silkworm. Fleece of sheep gives wool, cotton ball gives cotton and jute stalk gives jute fibre.

Reeling of silk is the process of taking out threads from the cocoon for use as silk. Rest all the options are correct.

Murrah is not a breed of sheep.

 Caterpillar must shed their skin in order to grow, unlike us insects have an exo-skeleton which means that they are pretty much “encased” inside their skin. The skin does not grow with the animals. Caterpillars shed their skin three to five times while the grow. And this process is called “molting”. There is skin never grow as skin of human does. So, while growing they have to crawl out of their skin when their skin becomes too tight. Each skin is called an “instar”.

Burrs.

Silk moth

Rearing of silk worms.

Removal of fleece.

The process of taking out threads from the cocoon for use as silk is called reeling the silk. Reeling is done in special machines, which unwind the threads or fibers of silk from the cocoon.

Reeling is a process of unwinding of silk filament from the cocoon. Depending upon the required thickness of silk thread, filaments from a number of cocoons are combined together and reeled. It is done by special machines.

Burrs

Protein.

 Merino is the soft and fine wool while Cotswold is coarser wool.

Fabrics are made up of yarns and yarns are further made up of fibres. The fibres of some fabrics such as cotton, jute, silk and wool are obtained from plants and animals. These are called natural fibres.

Sericulture is rearing of silk worms for obtaining silk.

Woolly dog

Protein.

Cotton and jute are considered as vegetable fibres. Silk is not a vegetable fibre it is an animal fibre formed by silkworms. Nylon is a synthetic fibre.

Silk is obtained from cocoon of the silkworm. It is a very shiny and smooth fibre and has vibrant colours.

By machine scouring is done nowadays.