1 Answers
Option 2 : (a) - (iv), (b) - (iii), (c) - (ii), (d) - (i)
Concept :
- Fibres are defined as thread-like structures that are thin, long and flexible strands.
- The two main sources of fibres are Plants and Animals.
- Plant fibres are obtained from plants sources like cotton, jute, bamboo, coconut tres, flax seeds, vegetable fibres, wood, grains etc.
Explanation :
Cotton :
- Cotton is a soft fibre that is obtained from cotton plants and grows as a ball.
- Cotton is basically grown in Maharashtra, Rajasthan, Madhya Pradesh, Gujrat etc.
- When cotton plants start flowering, yellowish-white flowers grow and after a few days, they turn red in colour.
- Later on, flowers change into cotton balls.
Flax :
- Flax also known as linseed with the binominal name Linum usitatissimum, is a member of the genus Linum in the family Linaceace.
- It is a food and fibre crop grown in cooler regions of India.
- Flax fibre is extracted from the skin of the stem of the plant.
- Flax fibre is soft, lustrous and flexible, bundles of fibre that look like blonde hair.
- It is stronger than cotton fibres but less elastic.
Silk :
- Silk is a natural protein fibre, some forms of which can be woven into textiles.
- The protein fibre of silk is composed mainly of fibroin and is produced by silkworms larvae to form cocoons.
- The caterpillar/ silkworm secretes fibre made up of a protein which gets hardened on being exposed to air and becomes silk fibres
- Silkworm completely covers itself with silk fibres and this covering is called a cocoon, which is further processed to obtain silk fibres.
Coconut fibre :
- Coconut fibre (coir) is a natural fibre obtained from the husk or the mesocarp of coconut ) cocus Nucifera).
- The fibre is typically golden colour after cleaning up, it is also known as golden fibre.
- It is fibrous and tough.
- Its individual fibre cells are hollow and narrow having thick walls containing cellulose.
- Coconut fibres are used for making mattresses., brushes, floor mats etc.
So, the correct answer is an option (2).
| Animal fibres | Plant fibres |
| 1) Animal fibres are extracted from animals | Plant fibres are extracted from plants |
| 2) They are made up of proteins | They are made up of cellulose |
| 3) Animal fibres have less strength as compared to plant fibres e.g. silk | Plant fibres are stronger than animal fibres e.g. jute |
- Jute: These plants require standing water and alluvial soil to grow well.
- Angora wool: The fur of the rabbit hair is extremely soft to touch, thus due to its desirable characteristics, they are in high demand and quite expensive.
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