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Fill in the blanks.
a.Silkworms feed on fresh leaves of _______plant.
b. ______means sorting the fibres according to quality.
c. The_______of the worm secretes the silk substance used to make silk. d. _________transform themselves inside the cocoon into moths.
e. the fleece needs to be_______before it can be spun into yarn.
Answers
Answer:
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Explanation:
ANS. a. Silkworms predominately feeds on mulberry leaves, but the genetic basis for its feeding preference is unknown.
b. In sorting, the fleece is sent to a factory where it is broken and separated into sections of different quality fibres. The process of separating the fleece of a sheep into sections according to the quality of woollen fibres is called sorting.
c. The protein fiber of silk is composed mainly of fibroin and is produced by certain insect larvae to form cocoons. The best-known silk is obtained from the cocoons of the larvae of the mulberry silkworm Bombyx mori reared in captivity (sericulture).
d. There are few transformations in nature as miraculous and fascinating as the process of becoming a butterfly.
There are few transformations in nature as miraculous and fascinating as the process of becoming a butterfly.Butterflies go through a life cycle that involves several stages: egg, larva, pupa, and adult. The metamorphosis from a caterpillar into a butterfly occurs during the pupa stage. During this stage, the caterpillar's old body dies and a new body forms inside a protective shell known as a chrysalis.
e. The shorn wool coat is called a fleece. It is also called "grease wool" because of all the oil and lanolin in the wool. This fleece must be cleaned before it can be processed into wool yarn.
Answer:
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