Final answer:Thestructural polysaccharidethat givescockroachestheir crunch ischitin.Explanation:Thestructural polysaccharidethat givescockroachestheircrunchischitin. Cockroaches have an exoskeleton, which is a hard outer covering that provides support and protection. This exoskeleton is primarily composed of chitin, a tough and flexible material. Chitin is a structural polysaccharide that is also found in the exoskeletons of other arthropods, such as insects and crustaceans.Chitin is made up of long chains of a sugar called N-acetylglucosamine, which are linked together. The arrangement of these chains and the presence of other proteins and minerals contribute to the hardness and durability of the exoskeleton. The chitin in the exoskeleton gives cockroaches their crunch when they are stepped on or crushed.Learn more aboutthe structural polysaccharide in cockroacheshere:brainly.com/question/30279328#SPJ14...

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