Which Ecdysozoan phylum contains members that have a segmented body encased in a rigid exoskeleton made of chitin plus other materials?

Question

Quizplus · Accepted Answer

Arthropoda is the only phylum in the given options that fits the description of having a segmented body covered by a rigid exoskeleton made of chitin and other materials, such as calcium carbonate in crustaceans. Annelida has a segmented body, but it is not encased in a rigid exoskeleton. Nemertea and Nematoda do not have segmented bodies encased in exoskeletons.

Which Ecdysozoan Phylum Contains Members That Have a Segmented Body