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) only arachnids have two major body segments of cephalothorax and abdomen.
E) arachnids have four pairs of walking legs.
Correct Answer:
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