SCIENCE
ZOOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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sensory appendage on the head
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shedding of the exoskeleton
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poison fangs
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substance composing exoskeleton
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Detailed explanation-1: -Chitin, a biopolymer of N-acetylglucosamine with some glucosamine, is the main component of the cell walls of fungi, the exoskeletons of arthropods such as crustaceans and insects, the radulas of mollusks and the beaks of cephalopods.
Detailed explanation-2: -Chitin is a modified polysaccharide that contains nitrogen; it is synthesized from units of N-acetyl-D-glucosamine (to be precise, 2-(acetylamino)-2-deoxy-D-glucose). These units form covalent -(1→4)-linkages (like the linkages between glucose units forming cellulose).
Detailed explanation-3: -Earwigs, beetles, and other insects have exoskeletons made of a substance called chitin. Other animals, such as snails, have hard shells made of calcium carbonate.