Zoology, 8th Edition (Miller)

Chapter 10: The Triploblastic, Acoelomate Body Plan

Quiz



1.

Which of the following is not an acoelomate?
A)Platyhelminthes
B)Rotifera
C)Gastrotrichia
D)Turbellaria
2.

Three 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
3.

Acoelomates 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
4.

Which of the following classes is typically not parasitic?
A)Turbellaria
B)Monogenea
C)Trematoda
D)Cestoidea
5.

Marine ribbon worms are found within the phylum:
A)Turbellaria
B)Monogenea
C)Nemertea
D)Gastrotricha
6.

Which 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
7.

The lone animal is this phyla lives on the mouthparts of North Atlantic lobsters.
A)Platyhelminthes
B)Nemertea
C)Cycliophora
D)Aceolomorpha
8.

With 34,000 species and counting, there are more described animals in this phyla of acoelomates than in any other phyla of acoelomates.
A)Platyhelminthes
B)Nemertea
C)Acoelomorpha
D)Gastrotricha
9.

Animals in the phyla Platyhelminthes, Nemertea, Gastrotricha, Acoelomorpha, and Cycliophora exhibit this type of symmetry.
A)radial symmetry
B)pentaradial symmetry
C)asymmetry
D)bilateral symmetry
10.

Sexual maturity in a larval body form is called
A)incomplete organization.
B)complete organization.
C)paedomorphosis.
D)all of the above (a-c).
11.

Characteristics 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.
12.

Most 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).
13.

Which is not part of the protonephridial system in a turbellarian?
A)nephridiopore
B)flame cell
C)nephron
D)excretory tube
14.

A few turbellarians have a free swimming larva termed a
A)Muller's larva.
B)planula larva.
C)pncomiricidium.
D)miricidium.
15.

Monogenetic 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.
16.

A 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.
17.

The scientific name of the Chinese liver fluke is:
A)Fasciola hepatica
B)Schistosoma haematobium
C)Schistosoma. mansoni
D)Clonorchis sinensis
18.

The scientific name of the sheep liver fluke is:
A)Fasciola hepatica
B)Schistosoma haematobium
C)Schistosoma mansoni
D)Clonorchis sinensis
19.

Almost all cestodes belong to the subclass
A)Eucestoda.
B)Cestodaria.
C)Cestoidea.
D)Testudines.
20.

In the beef tapeworm life cycle, as an egg develops it forms a six-hooked (hexacanth) larva called an oncosphere.
A)True
B)False
21.

A 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
22.

The most distinctive feature of nemerteans is a long proboscis held in a sheath called a rhynchocoel.
A)True
B)False
23.

Nemerteans are microscopic, aquatic animals with a complete digestive tract and an unusual proboscis.
A)True
B)False
24.

Animals in the phyla Acoelomorpha are small flat worms less than 5 mm in length.
A)True
B)False
25.

Animals in the phyla Platyhelminthes have diploblastic tissue organization.
A)True
B)False
26.

The monogenetic flukes (class Monogenea) are mostly external parasites of fishes.
A)True
B)False
27.

Turbellarians are monoecious with reproductive systems adapted for internal fertilization.
A)True
B)False
28.

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