The most highly specialized class of parasites within phylum Platyhelminthes is

It is estimated that there are ________________ species of sea sponges.

The Oligochaeta worms have

A filarial worm which infects dogs, particularly common in the United States is

There are approximately _________ species in Phylum Platyhelminthes.

In turbellarian nervous systems, neurons carrying information to the brain are __________ neurons.

Among those turbellarians possessing a digestive cavity, digestion is

Tapeworms lack

Which of the functions listed below is NOT a function of the parenchyma of the platyhelminthes?

Which one or more of the following statements accurately reflects our understanding of platyhelminth phylogeny? Select all that apply.