The caterpillar/ silkworm secretes fibre made of a protein which gets hardened on being exposed to air and become silk fibre. Silkworm completely covers itself by silk fibres and this covering is called cocoon which is further processed to obtain silk fibres.
Hence, the correct option is C
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Q1
Silkworm secrete fibre made up of:
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Q2
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Silkworms secrete fibre made of (a) fat (b) cellulose (c) protein (d) nylon
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The caterpillar secretes fibre which hardens on exposure to air and becomes silk fibre. The fibre secrets by caterpillar are made from:
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Q4
Fill in the blanks:
1. Silk threads are made from a sticky secretion secreted by the ............................... of the silkworms.
2. The finest wool is obtained from ............................... silk moth.
3. The most common silk moth is ............................... silk moth.
4. The cocoons are put in ............................... to loosen the silk fibre.
5. ............................... and ............................... are animal fibres.