Why is moulting necessary for larva of a silk moth
Answers
After they have molted four times, their body becomes slightly yellow and the skin becomes lighter. The larva then prepare to enter the pupal phase of their life cycle and enclose themselves in a cocoon made up of raw silk produced by the salivary glands. The final molt from larva to pupa takes place within the cocoon, which provides a vital layer of protection during the vulnerable , almost motionless pupal state.
If the animal is allowed to survive after the spinning cocoon and through the pupal phase of its life cycle, it releases proteolytic enzymes to make a hole in the cocoon so it can emerge as an adult moth.
By this, the germs present in the cocoon do not make a hole to escape off so the fibers would be separated and the silk farmer would not get good fibers and prepare for shedding their old skin to accommodate the fast growth.
Moulting is important for the larva of a silk moth because it allows the organism to grow.
Explanation:
- Moulting involves the shedding of old skin to accommodate new skin. Silkworm moults four times in its life cycle.
- The final moult from larva to pupa takes place within the cocoon.
- When silkworm has eaten enough, it seizes feeding and becomes immobile.
- Then it starts to secrete silk to shelter themselves. Silkworm constructs a cocoon made of silk fibres.
- They are protecting coverings of pupa which prevents the entry of other insects and protects from external environment.
- After silkmoth has moulted four times, their body becomes slightly yellow and the skin becomes lighter.
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