When considering the wormlike phyla within the protostomes, which feature is most useful in distinguishing groups?

Question

Quizplus · Accepted Answer

The various wormlike phyla within the protostomes are distinguished by their feeding structures or mouthparts. For example, annelids have parapodia and chaetae, while nematodes have a stylet for piercing and sucking. The presence or absence of a hemocoel, hydrostatic skeleton, and type of body cavity are less useful in distinguishing these groups.

When Considering the Wormlike Phyla Within the Protostomes, Which Feature