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Question

The arthropod exoskeleton is formed of

A
Several kinds of polysaccharides
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B
Several kinds of proteins
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C
Layers of proteins and chitin
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D
Single complex protein called erythropoietin
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Solution

The correct option is C Layers of proteins and chitin

Arthropods are covered with a tough, resilient integument or exoskeleton of chitin. Generally the exoskeleton will have thickened areas in which the chitin is reinforced or stiffened by materials such as minerals or hardened proteins. This happens in parts of the body where there is a need for rigidity or elasticity. So, the correct answer is 'Layers of protein and chitin'.


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