Question 1

Humans most frequently acquire trichinosis by

Accepted Answer

A)  having sexual contact with an infected partner. 
B)  eating undercooked pork. 
C)  inhaling the eggs of worms. 
D)  eating undercooked beef. 
E)  being bitten by tsetse flies. 
A)  having sexual contact with an infected partner. 
B)  eating undercooked pork. 
C)  inhaling the eggs of worms. 
D)  eating undercooked beef. 
E)  being bitten by tsetse flies.

Question 2

A natural predator of the crown-of-thorns sea star is a mollusc called the Giant Triton, Charonia tritonis. If the triton uses a radula to saw into the sea star, then to which clade should the triton belong?

Accepted Answer

A)  chitons 
B)  bivalves 
C)  gastropods 
D)  cephalopods 
A)  chitons 
B)  bivalves 
C)  gastropods 
D)  cephalopods

Question 3

Which phylum is characterized by animals that have a segmented body?

Accepted Answer

A)  Cnidaria 
B)  Platyhelminthes 
C)  Porifera 
D)  Arthropoda 
E)  Mollusca 
A)  Cnidaria 
B)  Platyhelminthes 
C)  Porifera 
D)  Arthropoda 
E)  Mollusca

Question 4

Which characteristic(s)is (are)shared by both cnidarians and flatworms?

Accepted Answer

A)  dorsoventrally flattened bodies 
B)  true muscle 
C)  radial symmetry 
D)  a digestive system with a single opening 
E)  two of these 
A)  dorsoventrally flattened bodies 
B)  true muscle 
C)  radial symmetry 
D)  a digestive system with a single opening 
E)  two of these

Question 5

How many of the following are characteristics of at least some members of the phylum Cnidaria?
1)a gastrovascular cavity
2)a polyp stage
3)a medusa stage
4)cnidocytes
5)a pseudocoelom

Accepted Answer

A)  one of these 
B)  two of these 
C)  three of these 
D)  four of these 
E)  five of these 
A)  one of these 
B)  two of these 
C)  three of these 
D)  four of these 
E)  five of these

Question 6

The organ(s)of respiratory gas exchange in oligochaetes is (are)

Accepted Answer

A)  parapodia. 
B)  gills. 
C)  the skin. 
D)  book lungs. 
E)  pairs of hollow bristles. 
A)  parapodia. 
B)  gills. 
C)  the skin. 
D)  book lungs. 
E)  pairs of hollow bristles.

Question 7

What distinguishes complete metamorphosis from incomplete metamorphosis in insects?

Accepted Answer

A)  the presence of wings in the adult, but not in earlier life stages 
B)  the presence of sex organs in the adult, but not in earlier life stages 
C)  the radically different appearance between adults and earlier life stages 
D)  Three of these responses are correct. 
E)  Two of these responses are correct. 
A)  the presence of wings in the adult, but not in earlier life stages 
B)  the presence of sex organs in the adult, but not in earlier life stages 
C)  the radically different appearance between adults and earlier life stages 
D)  Three of these responses are correct. 
E)  Two of these responses are correct.

Question 8

In a tide pool, a student encounters an organism with a hard outer covering that contains much calcium carbonate, an open circulatory system, and gills. The organism could potentially be a crab, a shrimp, a barnacle, or a bivalve. The presence of which of the following structures would allow for the most certain identification of the organism?

Accepted Answer

A)  a mantle 
B)  a heart 
C)  a body cavity 
D)  a filter-feeding apparatus 
E)  eyes 
A)  a mantle 
B)  a heart 
C)  a body cavity 
D)  a filter-feeding apparatus 
E)  eyes

Question 9

An elementary school science teacher decided to liven up the classroom with a saltwater aquarium. Knowing that saltwater aquaria can be quite a hassle, the teacher proceeded stepwise. First, the teacher conditioned the water. Next, the teacher decided to stock the tank with various marine invertebrates, including a polychaete, a siliceous sponge, several bivalves, a shrimp, several sea anemones of different types, a colonial hydra, a few coral species, an ectoproct, a sea star, and several herbivorous gastropod varieties. Lastly, she added some vertebrates-a parrotfish and a clownfish. She arranged for daily feedings of copepods and feeder fish.
-If the teacher had used a dissecting microscope to examine the outer surfaces of the empty bivalve shells, the teacher would probably have seen marks that had been left by

Accepted Answer

A)  jaws. 
B)  nematocysts. 
C)  tubefeet. 
D)  a lophophore. 
E)  a madreporite. 
A)  jaws. 
B)  nematocysts. 
C)  tubefeet. 
D)  a lophophore. 
E)  a madreporite.

Question 10

An elementary school science teacher decided to liven up the classroom with a saltwater aquarium. Knowing that saltwater aquaria can be quite a hassle, the teacher proceeded stepwise. First, the teacher conditioned the water. Next, the teacher decided to stock the tank with various marine invertebrates, including a polychaete, a siliceous sponge, several bivalves, a shrimp, several sea anemones of different types, a colonial hydra, a few coral species, an ectoproct, a sea star, and several herbivorous gastropod varieties. Lastly, she added some vertebrates-a parrotfish and a clownfish. She arranged for daily feedings of copepods and feeder fish.
-The bivalves started to die one by one; only the undamaged shells remained. To keep the remaining bivalves alive, the teacher would have to remove the

Accepted Answer

A)  sea anemones. 
B)  sea star. 
C)  gastropods. 
D)  ectoprocts. 
E)  parrotfish. 
A)  sea anemones. 
B)  sea star. 
C)  gastropods. 
D)  ectoprocts. 
E)  parrotfish.

Question 11

You find a small animal with eight legs crawling up your bedroom wall. Closer examination will probably reveal that this animal has

Accepted Answer

A)  simple, but not compound, eyes. 
B)  two pairs of antennae. 
C)  a head, thorax, and abdomen. 
D)  tracheae and spiracles. 
E)  more than one of these. 
A)  simple, but not compound, eyes. 
B)  two pairs of antennae. 
C)  a head, thorax, and abdomen. 
D)  tracheae and spiracles. 
E)  more than one of these.

Question 12

Against which hard structure do the circular and longitudinal muscles of annelids work?

Accepted Answer

A)  bristles 
B)  cuticle 
C)  shell 
D)  endoskeleton 
E)  hydrostatic skeleton 
A)  bristles 
B)  cuticle 
C)  shell 
D)  endoskeleton 
E)  hydrostatic skeleton

Question 13

If a lung were to be found in a mollusc, where would it be located?

Accepted Answer

A)  mantle cavity 
B)  coelom 
C)  incurrent siphon 
D)  visceral mass 
E)  excurrent siphon 
A)  mantle cavity 
B)  coelom 
C)  incurrent siphon 
D)  visceral mass 
E)  excurrent siphon

Exam 33: An Introduction to Invertebrates

Humans most frequently acquire trichinosis by

A natural predator of the crown-of-thorns sea star is a mollusc called the Giant Triton, Charonia tritonis. If the triton uses a radula to saw into the sea star, then to which clade should the triton belong?

Which phylum is characterized by animals that have a segmented body?

Which characteristic(s)is (are)shared by both cnidarians and flatworms?

How many of the following are characteristics of at least some members of the phylum Cnidaria? 1)a gastrovascular cavity 2)a polyp stage 3)a medusa stage 4)cnidocytes 5)a pseudocoelom

The organ(s)of respiratory gas exchange in oligochaetes is (are)

What distinguishes complete metamorphosis from incomplete metamorphosis in insects?

You find a small animal with eight legs crawling up your bedroom wall. Closer examination will probably reveal that this animal has

Against which hard structure do the circular and longitudinal muscles of annelids work?

If a lung were to be found in a mollusc, where would it be located?

Introduction: Themes in the Study of Life

The Chemical Context of Life

Water and Life

Carbon and the Molecular Diversity of Life

The Structure and Function of Large Biological Molecules

A Tour of the Cell

Membrane Structure and Function

An Introduction to Metabolism

Cellular Respiration and Fermentation

Photosynthesis

Cell Communication

The Cell Cycle

Meiosis and Sexual Life Cycles

Mendel and the Gene Idea

The Chromosomal Basis of Inheritance

The Molecular Basis of Inheritance

From Gene to Protein

Regulation of Gene Expression

Viruses

Biotechnology

Genomes and Their Evolution

Descent with Modification: A Darwinian View of Life

The Evolution of Populations

The Origin of Species

The History of Life on Earth

Phylogeny and the Tree of Life

Bacteria and Archaea

Protists

Plant Diversity I: How Plants Colonized Land

Plant Diversity II: The Evolution of Seed Plants

Fungi

An Overview of Animal Diversity

The Origin and Evolution of Vertebrates

Plant Structure, Growth, and Development

Resource Acquisition and Transport in Vascular Plants

Soil and Plant Nutrition

Angiosperm Reproduction and Biotechnology

Plant Responses to Internal and External Signals

Basic Principles of Animal Form and Function

Animal Nutrition

Circulation and Gas Exchange

The Immune System

Osmoregulation and Excretion

Hormones and the Endocrine System

Animal Reproduction

Animal Development

Neurons, Synapses, and Signaling

Nervous Systems

Sensory and Motor Mechanisms

Animal Behavior

An Introduction to Ecology and the Biosphere

Population Ecology

Community Ecology

Ecosystems and Restoration Ecology

Conservation Biology and Global Change

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