Question

1. What is meant by selective breeding? What is its purpose?
2. What is silk? How do we get silk from cocoon?
3. (a) What are raw silk and spun silk?
(b) On burning silk, it gives out the smell of burning hair. Give reason.
4. With the help of a flow chart only, describe the life cycle of a silkworm.
5. (a) What is sorter's disease?
(b) Why is this disease called occupational disease?
6. (a) Why do wool-yielding animals have a thick coat of hair on their bodies?​

Answer 1

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