Members of the Polychaeta

Question

Members of the Polychaeta
A) Have parapodia
B) Lack setae
C) Are segmented, unlike the Oligochaeta
D) All of the above

Accepted Answer

Members of the Polychaeta, a class of annelid worms, are characterized by having parapodia, which are paired appendages used for locomotion and sometimes respiration. Unlike the statement in choice B, polychaetes do have setae (bristles) on their parapodia. Choice C is incorrect because both Polychaeta and Oligochaeta (another class of annelids, which includes earthworms) are segmented.