An arachnid differs from a crustacean because
A) arachnids have book gills.
B) arachnids are mostly aquatic and crustaceans are mostly terrestrial.
C) only arachnids shed their exoskeletons.
D) arachnids have two major body segments, the cephalothorax and abdomen, while crustaceans have three body segments.
E) arachnids have four pairs of walking legs.

Question

Quizplus · Accepted Answer

Arachnids, such as spiders and scorpions, have four pairs of walking legs, distinguishing them from crustaceans, which typically have more than four pairs of legs. This is a fundamental difference in their morphology.

An Arachnid Differs from a Crustacean Because