Q14. During a visit to silk Industry, Science teacher enlightened the students of class VIII that silk is obtained from cocoon of silkworm. Sunaina asked her teacher if her sari was also made up of silk fibre? She replied yes. Then the teacher asked all the students to recall the life cycle of silk moth which they have studied in class VII. What is this drastic change that leads to change of larva into adult called
Answers
Answer:
The transformation of the larva into an adult through drastic changes is called metamorphosis. Metamorphosis is a biological process which involves sudden and abrupt changes in the body structure of the animal by cell growth and differentiation.
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Answer:
The proper sequence of the given statements are given below:
a) Female silk moths lay eggs.
b) Eggs are warmed to a suitable temperature for the larvae to hatch from eggs.
c) The larvae/caterpillars or silkworms are kept in clean trays along with freshly chopped mulberry leaves.
d) After 25 to 30 days, the caterpillars stop eating and start spinning cocoons.
e) Cocoons are kept under the sun or boiled in water.
f) Fibres are taken out from the cocoon.