Arthropods have an exoskeleton made of _____.
chitin
cellulose
silica
cartilage

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Question

Grade: Education Subject: biology
Arthropods have an exoskeleton made of _____.
chitin
cellulose
silica
cartilage
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(40)
they are definitely made of chitin
(53)

Arthropods have an exoskeleton made of CHITIN.