Exam 10: The Smaller Lophotrochozoan Phyla

The flame cell system and protonephridia of freshwater turbellarians primarily serve to remove __________ from the body.

The six-hooked (hexacanth)larva that develops from the egg of the beef tapeworm is the

Nemerteans differ from flatworms in that they have a complete gut and a

The members of the Class Monogenea have tissues that develop from this many germ layers.

The lidlike hatch on a trematode egg is called the

The free-swimming larval stage of some turbellarians is called a/an

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

The acanthocephalan larval stage that emerges from the egg is called a/an

The larval stage of the beef tapeworm that encysts in skeletal muscles is called the

Acanthocephalans are commonly called

Scolex,neck,and __________ comprise the three body regions of a tapeworm.

The helmet-shaped,ciliated larva of nemerteans is the

Animals in the phyla Cycliophora live exclusively on the mouthparts of

Chemoreceptors that aid in the location of food are especially dense in the __________ of turbellarians.

The first larval stage in the life history of a digenetic fluke is the

Some members of a diverse group of phyla share a common feeding structure and a certain type of larva.These characteristics are synapomorphies that identify these phyla as lophotrochozoans.Other animals are classified as lophotrochozoans but lack these synapomorphies.What explains the fact that animals that have these common characters are grouped with other animals that lack the characters?

The larval stage of the broad fish tapeworm that encysts in muscle is called the

In turbellarians,the nervous tissue is concentrated anteriorly in clusters of neurons called

In the rotifer class Bdelloidea,all females are __________,producing diploid eggs that hatch into diploid females.

Like the tapeworms,acanthocephalans lack