Which one of the following polymers is not biodegradable?
A. Cellulose
B. Starch
C. Protein
D. PVC
Answer: Option D
A. Cellulose
B. Starch
C. Protein
D. PVC
Answer: Option D
The fibers, such as nylon and polyester, that are made from chemical substances are called:
A. Natural fibres
B. Wool
C. Synthetic fibres
D. Silk
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