Question

(b) cellulose
(d) none of these
3. The silk fibres are formed of
(a) protein
(c) starch
4. The silk thread is obtained from
(a) pupa
(c) adult silkworm
5. Rearing of silkworms is called
(a) apiculture
(c) sericulture
(b) cocoon
(d) eggs
(b) floriculture
(d) horticulture
E. FILL IN THE BLANKS
1. Air is a......
of heat
2. The process to obtain animals or plants having special characteristics is called........
breeding.
3. The silkworm changes into a..........

inside the cocoon,
4. After shearing, scouring and sorting the wool fibres are......
in desired colours
5. To get silk thread from the cocoons, they are.......
in water,
STATE TRUE OR FALSE
1. It is believed that silk was discovered in India,
2. Dog's hair can also be processed to get wool.
3. Silkworms can feed on any leaves.
4. Fibre for wool is obtained from the hard and coarse fur of a sheep's body,
5. The silkworms spin cocoon during their life cycle.​

Answer 1

Answer:

3) is c

4) is a

5) is b that is cocoon

Answer 2

the silk fibres are formed of