Question

F. short Answer Questions
1. Mention two ways by which you can differentiate wool from silk.
2. What is the role of mulberry trees in the production of silk?
3. What treatment is given to the cocoons to separate out the threads?
4. What are the health hazards face by the workers in wool industry?
5. What is selective breeding?​

Answer 1

Answer:

1. Silk and wool are two types of fibers that are obtained from animal sources. Silk is manufactured from the cocoons of silkworms whereas wool is manufactured from the fur of furry animals like goats
2. Mulberry leaves nutrition values plays very important role for production of quality silk through feeding to silkworm. ... Rearing of silkworm for the production of silk fiber is called as sericulture. Mulberry is an indispensable crop for the sericulture industry as it is the exclusive source of food for silkworms.
3. 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.
4. The most common health and safety hazards identified in the wool shed that can affect you are: sprains and strains, wrist and back problems, cuts and bruising, fatigue and dehydration. Some more serious health hazards are: wool based infections, giardia, leptospirosis, hepatitis, tetanus, dermatitis and noise.
5. Selective breeding is the process by which humans use animal breeding and plant breeding to selectively develop particular phenotypic traits by choosing which typically animal or plant males and females will sexually reproduce and have offspring together......

Hope it helps you

Answer 2

Answer:

1.Silk has shiny appearance while wool haven't.

b. Silk is one of the strongest natural fibre but wool hasn't too much strongness...

2. The silkworms feeds on mulberry tree that's why it is a very important thing in production of silk..

3.The process of taking out thread from cocoon is Known as Reeling..

4. Infections such as giardia, hepatitis, tetanus, dermatitis and noise..

5.The process in which one type of breed is reproduced (crossed) with other is called selective breeding.