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1Which of the following is not an acoelomate?
A)Platyhelminthes
B)Rotifera
C)Gastrotrichia
D)Turbellaria


2Three important characteristics first appeared in the acoelomates. Which of the following is not one of them?
A)bilateral symmetry
B)a true mesoderm
C)an excretory system
D)nervous tissues


3Acoelomates lack a body cavity because the __________ cells completely fills the area between the outer epidermis and digestive tract.
A)parenchymal
B)muscular
C)nervous
D)ectodermal


4Which of the following classes is typically not parasitic?
A)Turbellaria
B)Monogenea
C)Trematoda
D)Cestoidea


5Marine ribbon worms are found within the phylum:
A)Turbellaria
B)Monogenea
C)Nemertea
D)Gastrotricha


6Which of the following would you find either living a free-living life style or living in the space between bottom sediments in freshwater?
A)Gastrotricha
B)Nemertea
C)Monogenea
D)Turbellaria


7Sexual maturity in a larval body form is called
A)incomplete organization.
B)complete organization.
C)paedomorphosis.
D)all of the above (a-c).


8Characteristics of the Platyhelminthes include all of the following except
A)usually flattened dorsoventrally
B)usually unsegmented worms.
C)incomplete gut.
D)many organ systems present.


9Most turbellarians, such as the common planarian,
A)are carnivores.
B)will also feed as herbivores.
C)have chemoreceptors that help them detect food.
D)all of the above (a-c).


10Which is not part of the protonephridial system in a turbellarian?
A)nephridiopore
B)flame cell
C)nephron
D)excretory tube


11A few turbellarians have a free swimming larva termed a
A)Muller's larva.
B)planula larva.
C)pncomiricidium.
D)miricidium.


12Monogenetic flukes are so named because they
A)have only one generation in their life cycle.
B)have a life cycle where only one adult develops from one egg.
C)are solely external parasites.
D)both a and b.


13A small group of flukes that are primarily internal parasites of molluscs are the
A)subclass Aspidogastrea.
B)subclass Digenea.
C)class Monogenea.
D)class Cestoidea.


14The scientific name of the Chinese liver fluke is:
A)Fasciola hepatica
B)Schistosoma haematobium
C)Schistosoma. mansoni
D)Clonorchis sinensis


15The scientific name of the sheep liver fluke is:
A)Fasciola hepatica
B)Schistosoma haematobium
C)Schistosoma mansoni
D)Clonorchis sinensis


16Almost all cestodes belong to the subclass
A)Eucestoda.
B)Cestodaria.
C)Cestoidea.
D)Testudines.


17In the beef tapeworm life cycle, as an egg develops it forms a six-hooked (hexacanth) larva called an oncosphere.
A)True
B)False


18A fluid-filled bladder worm larva of a pork tapeworm is called a cysticercus, and it may form bladders in the brain of the mammalian host.
A)True
B)False


19The most distinctive feature of nemerteans is a long proboscis held in a sheath called a rhynchocoel.
A)True
B)False


20Nemerteans are microscopic, aquatic animals with a complete digestive tract and an unusual proboscis.
A)True
B)False


21The monogenetic flukes (class Monogenea) are mostly external parasites of fishes.
A)True
B)False


22Turbellarians are monoecious with reproductive systems adapted for internal fertilization.
A)True
B)False


23Most turbellarians move entirely by cilia and are predators and scavengers.
A)True
B)False





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