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Steps for the production of silk are given below in a jumbled order. Arrange them in their proper sequence. (a) Eggs are warmed to a suitable temperature for the larvae to hatch from eggs. (b) Fibers are taken out from the cocoon. (c) After 25 to 30 days, the caterpillars stop eating and start spinning cocoons. (d) The larvae/caterpillars or silkworms are kept in clean trays along with freshly chopped mulberry leaves. (e) Female silk moths lay eggs. (f) Cocoons are kept under the sun or boiled in water.

The proper sequence of the given statements are given below: a) Female silk moths lay eggs. b) Eggs are warmed... View Article

Some words related to silk are jumbled up. Write them in their correct form. (a) TURECULRISE (b) WILSMORK (c) BELMURRY (d) RINGLEE

The correct form of given words are: a) SERICULTURE b) SILKWORM c) MULBERRY d) REELING Sericulture Sericulture is the process... View Article

Various steps involved to obtain wool from fleece are given here. (i) Picking out the burrs (ii) Dyeing in various colours (iii) Shearing (iv) Scouring (v) Sorting Write the above steps in the correct sequence in which they are carried out.

The correct sequence in which they are carried out: i) Shearing ii)Scouring iii)Sorting iv) Picking out the burrs v) Dyeing... View Article

How does the hair of certain animals help in keeping their bodies warm?

The most important function of hair in mammals is that of insulating against cold by conserving body heat. Specialized hairs... View Article

State whether the following statements are True or False. If false, correct them. (a) Silkworms are caterpillars of the silk moth. (b) In India, camels and goats are generally reared for obtaining wool. (c) The rearing of silkworms for obtaining silk is called silviculture. (d) In the process of obtaining wool from fleece, sorting is done after scouring. (e) Yak hair is not used to make woollen fabric.

(a) True Silk moth is an insect which is responsible for yielding silk fibre. Silk moths lay eggs, from which... View Article

Hair trap a lot of _, which is a poor _ of heat.

Hair traps a lot of air, which is a poor conductor of heat. Explanation Animals have a thick coat of... View Article

Silk fibres come from _ of silk _.

Silk fibres come from the cocoon of silk worm. Explanation Silk is a natural protein fibre which can be used... View Article

Wool yielding animals bear _________ on their body.

Wool yielding animals bear fleece (hair) on their body. Explanation Wool comes from varieties of animals such as sheep, yak... View Article

_ and _ fibres are obtained from animals.

Silk and wool fibres are obtained from animals. Explanation Fibres are obtained from plants as well as animals. The example... View Article

Silkworms secrete fibre made of (a) fat (b) cellulose (c) protein (d) nylon

c) Protein Explanation The caterpillar/ silkworm secretes fibre made of a protein which get hardened on being exposed to air... View Article

Reeling of silk is (a) a process of making silk reels. (b) the spinning of silk fibres. (c) the weaving of silk cloth. (d) the process of taking silk threads from the cocoon.

d) The process of taking silk thread from the cocoon Explanation Silk reeling is the process by which a number... View Article

The term sericulture is used for (a) culture of bacteria. (b) rearing of the silkworm. (c) making silk fabric from silk yarn. (d) production of sarees.

(b) rearing of the silkworm. Explanation Sericulture is the process of cultivating silkworms and extracting silk from them. The caterpillars... View Article

The general process that takes place at a sheep shearing shed is (a) removal of fleece. (b) separating the hair of different textures. (c) washing of sheep fibre to remove grease. (d) rolling of sheep fibre into yarn.

(a) removal of fleece. Explanation Sheep hair has two types of fibres – the beard hair and the skin hair.... View Article

Selective breeding is a process of (a) selecting the offsprings with desired properties. (b) selecting the parents with desired properties. (c) selecting an area for breeding. (d) selecting fine hair for good quality wool.

b) Selecting the parents with desired properties. Explanation Selective breeding is the process of crossing of two selected varieties having... View Article

A wool fibre cannot be obtained from which of the following? (a) Goat (b) Llama (c) Alpaca (d) Moth

d) Moth Explanation Animals that yield wool are Angora goats, Llama and Alpaca. Silk moth lays eggs which develop into... View Article

The silk fibre is obtained from (a) fleece of sheep (b) cotton ball (c) cocoon (d) shiny jute stalk

c) Cocoon Explanation A cocoon is formed at one of the life stages of a silk moth. Caterpillar/ silkworm completely... View Article

Paheli wanted to buy a gift made of animal fibre obtained without killing the animal. Which of the following would be the right gift for her to buy? (a) Woollen shawl (b) Silk scarf (c) Animal fur cap (d) Leather jacket

a) Woollen shawl Explanation Wool is extracted from animals such as sheep without killing them. Wool is a natural animal fibre... View Article

Which of the following is not a type of silk? (a) Mulberry silk (b) Tassar silk (c) Mooga silk (d) Moth silk

d) Moth silk Explanation Mulberry silk, Tasar Silk, and Mooga silk are the varieties of silk produced by different silkworms... View Article

The rearing of silkworms for obtaining silk is called (a) cocoon (b) silk (c) sericulture (d) silviculture

b) Sericulture Explanation Sericulture is the process of cultivating silkworms and extracting silk from them. The caterpillars of the domestic... View Article

Label the following parts in Figure and name them. (a) The largest gland in our body. (b) The organ where protein digestion starts. (c) The organ that releases digestive juice into the small intestine. (d) The organ where bile juice gets stored.

(a) Liver is the largest gland of the human body. (b) Digestion of protein starts in the stomach of human... View Article

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