I want to know the answer to the following question:
What offshoots of polychaetes are only segmented in the rear?
All the background I'm provided with is that "Polychaetes, which these analyses found to be the parent group, have completely segmented bodies, while polychaetes' echiurans and sipunculan offshoots are not segmented and pogonophores are segmented only in the rear parts of their bodies.". Is that enough to answer the question?