The oldest ancestral and most widely-occurring larva in the Crustacea is
A)a juvenile resembling the adult.
B)the trochophore.
C)the veliger.
D)the nauplius.
E)a planula.

Question

Quizplus · Accepted Answer

The nauplius is the oldest ancestral and most widely-occurring larva in the Crustacea, characterized by its unsegmented body, three pairs of appendages, and single median eye. It is found in a variety of crustacean groups, including barnacles, copepods, and shrimp.

The Oldest Ancestral and Most Widely-Occurring Larva in the Crustacea