Question 1

Which of the following groups contains the largest number of species?

Accepted Answer

A)  Rotifers 
B)  Arthropods 
C)  Annelids 
D)  Phoronids 
E)  Polychaetes 
A)  Rotifers 
B)  Arthropods 
C)  Annelids 
D)  Phoronids 
E)  Polychaetes

Question 2

Which groups are arthropod relatives with unjointed legs?

Accepted Answer

A)  Trilobites and onychophorans 
B)  Onychophorans and tardigrades 
C)  Trilobites and tardigrades 
D)  Onychophorans and chelicerates 
E)  Tardigrades and chelicerates 
A)  Trilobites and onychophorans 
B)  Onychophorans and tardigrades 
C)  Trilobites and tardigrades 
D)  Onychophorans and chelicerates 
E)  Tardigrades and chelicerates

Question 3

Why can parasitic flukes of vertebrates devote most of their bodies to reproduction?

Accepted Answer

A)  They are not dependent on the host's circulatory system. 
B)  They have well developed digestive tracts. 
C)  They have a highly developed nervous system. 
D)  They acquire all of their nutrients from their host. 
E)  All of the above 
A)  They are not dependent on the host's circulatory system. 
B)  They have well developed digestive tracts. 
C)  They have a highly developed nervous system. 
D)  They acquire all of their nutrients from their host. 
E)  All of the above

Question 4

Which of the following statements concerning the mantle of mollusks is false?

Accepted Answer

A)  It is present in all groups of mollusks except the octopuses. 
B)  In terrestrial gastropods, it is modified into a lung. 
C)  It is part of a filtering device used for feeding in bivalves. 
D)  It is used as the basis of jet propulsion by cephalopods. 
E)  It secretes the shell that provides external protection in most molluscan groups. 
A)  It is present in all groups of mollusks except the octopuses. 
B)  In terrestrial gastropods, it is modified into a lung. 
C)  It is part of a filtering device used for feeding in bivalves. 
D)  It is used as the basis of jet propulsion by cephalopods. 
E)  It secretes the shell that provides external protection in most molluscan groups.

Question 5

Flatworms differ from cnidarians in that flatworms

Accepted Answer

A)  are radially symmetrical, whereas cnidarians are bilaterally symmetrical. 
B)  have more complex internal organs than cnidarians do. 
C)  are diploblastic, whereas cnidarians are triploblastic. 
D)  have two openings to the digestive cavity, whereas cnidarians have only one. 
E)  have an excretory system, whereas cnidarians do not. 
A)  are radially symmetrical, whereas cnidarians are bilaterally symmetrical. 
B)  have more complex internal organs than cnidarians do. 
C)  are diploblastic, whereas cnidarians are triploblastic. 
D)  have two openings to the digestive cavity, whereas cnidarians have only one. 
E)  have an excretory system, whereas cnidarians do not.

Question 6

Evidence from developmental, structural, and molecular biology indicates that the protostomes split into two major monophyletic lineages that have been evolving separately since ancient times. These two lineages are the _______ and the _______.

Accepted Answer

lophotroch

Exam 32: Protostome Animals

Which of the following groups contains the largest number of species?

Which groups are arthropod relatives with unjointed legs?

Why can parasitic flukes of vertebrates devote most of their bodies to reproduction?

Which of the following statements concerning the mantle of mollusks is false?

Flatworms differ from cnidarians in that flatworms

Evidence from developmental, structural, and molecular biology indicates that the protostomes split into two major monophyletic lineages that have been evolving separately since ancient times. These two lineages are the _______ and the _______.

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 Signaling and Communication

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

Recombinent Dna and Biotechnology

Differential Gene Expression in Development

Development and Evolutionary Change

Evidence and Mechanisms of Evolution

Reconstructing and Using Phylogenies

Species and Their Formation

Evolution of Genes and Genomes

The History of Life on Earth

Bacteria and Archaea: the Prokaryotic Domains

The Origin and Diversification of Eukaryotes

Plants Without Seeds: From Water to Land

The Evolution of Seed Plants

Fungi: Recyclers, Pathogens, Parasites, and Plant Partners

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 and Nervous Systems

Sensory Systems

The Mammalian Nervous System: Structure and Higher Function

Musculoskeletal Systems

Gas Exchange in Animals

Circulatory Systems

Nutrition, Digestion, and Absorption

Salt and Water Balance and Nitrogen

Animal Behavior

Ecology and the Distribution of Life

Population Ecology

Species Interaction and Coevolution

Community Ecology

Ecosystems and Global Ecology

Conservation Biology

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Evidence from developmental, structural, and molecular biology indicates that the protostomes split into two major monophyletic lineages that have been evolving separately since ancient times. These two lineages are the _ and the _.