All Arthropods Share

Question

All arthropods share
A) A calcified internal skeleton
B) A calcified external skeleton
C) An external skeleton composed of chitin
D) A strictly marine habitat

Accepted Answer

Arthropods, which include insects, arachnids, and crustaceans, are characterized by having an external skeleton (exoskeleton) made of chitin, a tough, flexible polysaccharide.