Question

Read the given statements and select the option that correctly identifies them as true (T) and false (F)
ones.
(i) Llama and alpaca are breeds of wool yielding camels.
(ii) Cocoon of silkworm secretes fibre made of protein which hardens on exposure to air and become
silk fibre.
(ili) Anthrax is an occupational disease of wool industry caused by Bacillus anthracis.​

Answer 1

Required Answer:-

(i) Llama and alpaca are breeds of wool yielding camels.

• True
• Llama and Alpaca are rare breeds of camels but better considered to be camelids found in hilly and mountainous region.

(ii) Cocoon of silkworm secretes fibre made of protein which hardens on exposure to air and become silk fibre.

• True
• The fibre is rich in protein and is called silk. The caterpillar after consuming a lot of mulberry leaves grows in size to form a cocoon around itself.
• This changes the caterpillar into a adult moth through metamorphosis inside the cocoon.

(ili) Anthrax is an occupational disease of wool industry caused by Bacillus anthracis $.$

• True.
• But better it is known as sorters disease. It is common among the ruminants but can be an occupational hazard for workers who process hides, hair, bone and bone products and wool.