Question 1

Which statement about spiders is false?

Accepted Answer

A)  Mouth parts are used for chewing. 
B)  Some have a poisonous bite. 
C)  Some have excellent vision. 
D)  They spin elaborate webs. 
E)  They have four pairs of walking legs. 
A)  Mouth parts are used for chewing. 
B)  Some have a poisonous bite. 
C)  Some have excellent vision. 
D)  They spin elaborate webs. 
E)  They have four pairs of walking legs.

Question 2

Periodic molting of the insect exoskeleton is necessary because

Accepted Answer

A)  the growth of the exoskeleton is not sufficient to accommodate the body growing inside it. 
B)  an insect must consume large amounts of food to support the growth of the exoskeleton. 
C)  it prevents an insect from moving rapidly. 
D)  it attracts predators. 
E)  it accumulates toxins. 
A)  the growth of the exoskeleton is not sufficient to accommodate the body growing inside it. 
B)  an insect must consume large amounts of food to support the growth of the exoskeleton. 
C)  it prevents an insect from moving rapidly. 
D)  it attracts predators. 
E)  it accumulates toxins.

Question 3

An aquatic animal with a foot and mantle possesses _______ for gas exchange.

Accepted Answer

The answer of An aquatic animal with a foot and...

Question 4

Centipedes and millipedes are _______.

Accepted Answer

The answer of Centipedes and millipedes are _______....

Question 5

A segmented coelom is characteristic of

Accepted Answer

A)  bryozoans. 
B)  mollusks. 
C)  annelids. 
D)  flatworms. 
E)  nematodes. 
A)  bryozoans. 
B)  mollusks. 
C)  annelids. 
D)  flatworms. 
E)  nematodes.

Question 6

Larvae of Trichinella are activated in a person's digestive tract, emerge from their cysts, and attach to the intestinal wall, where they feed.Trichinella is

Accepted Answer

A)  an annelid. 
B)  a snail. 
C)  a protist. 
D)  a nematode. 
E)  an ribbon worm. 
A)  an annelid. 
B)  a snail. 
C)  a protist. 
D)  a nematode. 
E)  an ribbon worm.

Question 7

A soft-shell crab is one that has just _______.

Accepted Answer

The answer of A soft-shell crab is one that has...

Question 8

Bryozoans, annelids, and mollusks are grouped as lophotrochozoans.Which characteristic do they have in common?

Accepted Answer

A)  They are aquatic. 
B)  They have a ciliated trochophore. 
C)  They use a lophophore for feeding. 
D)  They have wormlike body forms. 
E)  They molt their cuticle. 
A)  They are aquatic. 
B)  They have a ciliated trochophore. 
C)  They use a lophophore for feeding. 
D)  They have wormlike body forms. 
E)  They molt their cuticle.

Question 9

Which of the following is not associated with a parasitic lifestyle, as seen in tapeworms and flukes?

Accepted Answer

A)  Complex digestive systems 
B)  Flattened body 
C)  Life cycles with several larval stages 
D)  Life cycles with multiple hosts 
E)  Reduced gastrovascular cavity 
A)  Complex digestive systems 
B)  Flattened body 
C)  Life cycles with several larval stages 
D)  Life cycles with multiple hosts 
E)  Reduced gastrovascular cavity

Question 10

Which statement about insect wings is false?

Accepted Answer

A)  The insect wing may have evolved from an ancestral appendage similar to that of modern crustaceans. 
B)  Development of the insect wing is governed by the expression of the same genes that govern development of crustacean appendages. 
C)  Development of the insect wing and development of crayfish appendages are controlled by the pdm gene. 
D)  The Hox gene pdm is expressed in both the wings and legs of insects. 
E)  Appendages of ancestral crustaceans are thought not to have expressed the Hox gene pdm. 
A)  The insect wing may have evolved from an ancestral appendage similar to that of modern crustaceans. 
B)  Development of the insect wing is governed by the expression of the same genes that govern development of crustacean appendages. 
C)  Development of the insect wing and development of crayfish appendages are controlled by the pdm gene. 
D)  The Hox gene pdm is expressed in both the wings and legs of insects. 
E)  Appendages of ancestral crustaceans are thought not to have expressed the Hox gene pdm.

Question 11

An animal that has a hemocoel, muscles attached to the inside of a rigid exoskeleton, and a complete digestive tract would most likely be a(n)

Accepted Answer

A)  nematode. 
B)  annelid. 
C)  arthropod. 
D)  mollusk. 
E)  arrow worm. 
A)  nematode. 
B)  annelid. 
C)  arthropod. 
D)  mollusk. 
E)  arrow worm.

Question 12

A key difference between bivalves and gastropods is that

Accepted Answer

A)  bivalves have a one-part shell, gastropods have a two-part shell. 
B)  bivalves take in food through an incurrent siphon, gastropods filter food with their gills. 
C)  bivalves are found only in marine environments, gastropods only occur in freshwater. 
D)  all bivalves have a shell, not all gastropods have a shell. 
E)  bivalves move by means of a muscular foot, gastropods move by via ciliated gills. 
A)  bivalves have a one-part shell, gastropods have a two-part shell. 
B)  bivalves take in food through an incurrent siphon, gastropods filter food with their gills. 
C)  bivalves are found only in marine environments, gastropods only occur in freshwater. 
D)  all bivalves have a shell, not all gastropods have a shell. 
E)  bivalves move by means of a muscular foot, gastropods move by via ciliated gills.

Question 13

All oligochaetes

Accepted Answer

A)  have eyes. 
B)  have anterior tentacles. 
C)  are hermaphrodites. 
D)  have complete metamorphosis. 
E)  have parapodia. 
A)  have eyes. 
B)  have anterior tentacles. 
C)  are hermaphrodites. 
D)  have complete metamorphosis. 
E)  have parapodia.

Question 14

Trichinella is a(n) _______ that is parasitic in humans.

Accepted Answer

The answer of Trichinella is a(n) _______ that is parasitic...

Question 15

In Work with the Data , you were asked to make many assumptions to estimate the number of species of insects on Earth.Do you think these assumptions are reasonable? Why or why not? Would you argue for a different set of assumptions? How do you think these changes in assumptions would affect your calculations? Can you think of ways to test these assumptions?

Accepted Answer

All entomologists agree that many more s

Question 16

The distinguishing feature of ecdysozoans is the _______, a nonliving covering that provides them with protection and support.

Accepted Answer

The answer of The distinguishing feature of ecdysozoans is the...

Question 17

Flatworms differ from nematodes in that flatworms

Accepted Answer

A)  are radially symmetrical, whereas nematodes are bilaterally symmetrical. 
B)  lack a cuticle, whereas nematodes secrete a cuticle that they molt. 
C)  have two embryonic cell layers, whereas nematodes have three. 
D)  have two openings to the digestive cavity, whereas some nematodes lack a digestive tract. 
E)  lack an anterior brain, whereas nematodes have a small anterior brain. 
A)  are radially symmetrical, whereas nematodes are bilaterally symmetrical. 
B)  lack a cuticle, whereas nematodes secrete a cuticle that they molt. 
C)  have two embryonic cell layers, whereas nematodes have three. 
D)  have two openings to the digestive cavity, whereas some nematodes lack a digestive tract. 
E)  lack an anterior brain, whereas nematodes have a small anterior brain.

Question 18

Many lineages of lophotrochozoans have a type of free-living larva known as a

Accepted Answer

A)  polyp. 
B)  planula. 
C)  trochophore. 
D)  nauplius. 
E)  medusa. 
A)  polyp. 
B)  planula. 
C)  trochophore. 
D)  nauplius. 
E)  medusa.

Question 19

One chelicerate group, the _______, consists of important terrestrial predators.

Accepted Answer

The answer of One chelicerate group, the _______, consists of...

Question 20

A 500-million-year-old fossil from the Cambrian shows what appears to be a two mirror images of a marine invertebrate.This animal is likely an ancestral _______.

Accepted Answer

The answer of A 500-million-year-old fossil from the Cambrian shows...

Exam 31: Protostome Animals

Which statement about spiders is false?

Periodic molting of the insect exoskeleton is necessary because

An aquatic animal with a foot and mantle possesses _______ for gas exchange.

Centipedes and millipedes are _______.

A segmented coelom is characteristic of

Larvae of Trichinella are activated in a person's digestive tract, emerge from their cysts, and attach to the intestinal wall, where they feed.Trichinella is

A soft-shell crab is one that has just _______.

Bryozoans, annelids, and mollusks are grouped as lophotrochozoans.Which characteristic do they have in common?

Which of the following is not associated with a parasitic lifestyle, as seen in tapeworms and flukes?

Which statement about insect wings is false?

An animal that has a hemocoel, muscles attached to the inside of a rigid exoskeleton, and a complete digestive tract would most likely be a(n)

A key difference between bivalves and gastropods is that

All oligochaetes

Trichinella is a(n) _______ that is parasitic in humans.

The distinguishing feature of ecdysozoans is the _______, a nonliving covering that provides them with protection and support.

Flatworms differ from nematodes in that flatworms

Many lineages of lophotrochozoans have a type of free-living larva known as a

One chelicerate group, the _______, consists of important terrestrial predators.

A 500-million-year-old fossil from the Cambrian shows what appears to be a two mirror images of a marine invertebrate.This animal is likely an ancestral _______.

Studying Life

Small Molecules and the Chemistry of Life

Proteins, Carbohydrates, and Lipids

Nucleic Acids and the Origin of Life

Cells: the Working Units of Life

Cell Membranes

Cell Communication and Multicellularity

Energy, Enzymes, and Metabolism

Pathways That Harvest Chemical Energy

Photosynthesis: Energy From Sunlight

The Cell Cycle and Cell Division

Inheritance, Genes, and Chromosomes

Dna and Its Role in Heredity

From Dna to Protein: Gene Expression

Gene Mutation and Molecular Medicine

Regulation of Gene Expression

Genomes

Recombinant Dna and Biotechnology

Mechanisms of Evolution

Reconstructing and Using Phylogenies

Speciation

Evolution of Genes and Genomes

The History of Life on Earth

Bacteria, Archaea, and Viruses

The Origin and Diversification of Eukaryotes

Plants Without Seeds: From Water to Land

The Evolution of Seed Plants

The Evolution and Diversity of Fungi

Animal Origins and the Evolution of Body Plans

Deuterostome Animals

The Plant Body

Transport in Plants

Plant Nutrition

Regulation of Plant Growth

Reproduction in Flowering Plants

Plant Responses to Environmental Challenges

Physiology, Homeostasis, and Temperature Regulation

Animal Hormones

Immunology: Animal Defense Systems

Animal Reproduction

Animal Development

Neurons, Glia, and Nervous Systems

Sensory Systems

The Mammalian Nervous System: Structure and Higher Functions

Musculoskeletal Systems

Gas Exchange

Circulatory Systems

Nutrition, Digestion, and Absorption

Salt and Water Balance and Nitrogen Excretion

Animal Behavior

The Physical Environment and Biogeography of Life

Populations

Species Interactions

Communities

Ecosystems

A Changing Biosphere

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