Question 1

Which cnidarian group is geologically important because growth of its members can result in the formation of islands and atolls?

Accepted Answer

A)  Hydrozoans 
B)  Scyphozoans 
C)  Anthozoans 
D)  Turbellarians 
E)  Ctenophores 
A)  Hydrozoans 
B)  Scyphozoans 
C)  Anthozoans 
D)  Turbellarians 
E)  Ctenophores

Question 2

Segmentation of animals is important evolutionarily because it

Accepted Answer

A)  allows organisms to grow much larger than would be possible without segmentation. 
B)  has allowed organisms to alter their body forms in complex ways. 
C)  increases the mobility of an organism. 
D)  reduces the surface area-to-volume ratio. 
E)  All of the above 
A)  allows organisms to grow much larger than would be possible without segmentation. 
B)  has allowed organisms to alter their body forms in complex ways. 
C)  increases the mobility of an organism. 
D)  reduces the surface area-to-volume ratio. 
E)  All of the above

Question 3

Which of the following statements about a deuterostome is false?

Accepted Answer

A)  Three distinct layers of tissue were present during development. 
B)  If a coelom is present, it formed within the embryonic mesoderm. 
C)  Its early embryonic cleavage pattern was radial. 
D)  It is diploblastic. 
E)  Gastrulation occurred during development. 
A)  Three distinct layers of tissue were present during development. 
B)  If a coelom is present, it formed within the embryonic mesoderm. 
C)  Its early embryonic cleavage pattern was radial. 
D)  It is diploblastic. 
E)  Gastrulation occurred during development.

Question 4

Which of the following is not one of the mechanisms of movement in animals?

Accepted Answer

A)  Hydrostatic skeleton 
B)  Jointed appendages 
C)  Being sessile 
D)  Segmentation 
E)  Body cavities 
A)  Hydrostatic skeleton 
B)  Jointed appendages 
C)  Being sessile 
D)  Segmentation 
E)  Body cavities

Question 5

The Bilateria group of animals

Accepted Answer

A)  is polyphyletic. 
B)  includes cnidarians. 
C)  includes some diploblastic animals. 
D)  is monophyletic and radially symmetrical. 
E)  is monophyletic and bilaterally symmetrical. 
A)  is polyphyletic. 
B)  includes cnidarians. 
C)  includes some diploblastic animals. 
D)  is monophyletic and radially symmetrical. 
E)  is monophyletic and bilaterally symmetrical.

Question 6

Which of the following organisms is matched incorrectly with its feeding strategy?

Accepted Answer

A)  Rabbit: herbivore 
B)  Earthworm: detritivore 
C)  Tiger: predator 
D)  Flamingo: carnivore 
E)  Tapeworm: parasite 
A)  Rabbit: herbivore 
B)  Earthworm: detritivore 
C)  Tiger: predator 
D)  Flamingo: carnivore 
E)  Tapeworm: parasite

Question 7

Derived cnidarian classes have life cycles involving two stages: the _______ and the _______.

Accepted Answer

The answer of Derived cnidarian classes have life cycles involving...

Question 8

Use the following to answer questions :
Refer to the diagram below, showing an animal cross-section.  
-Is this animal acoelomate, pseudocoelomate, or coelomate?

Accepted Answer

The answer of Use the following to answer questions :
Refer...

Question 9

Which of the following animal stages or strategies does not contribute to the dispersal of a species?

Accepted Answer

A)  Trochophore larva 
B)  Butterfly pupa 
C)  Multiple hosts of parasites 
D)  Nauplius larva 
E)  Flying adults 
A)  Trochophore larva 
B)  Butterfly pupa 
C)  Multiple hosts of parasites 
D)  Nauplius larva 
E)  Flying adults

Question 10

Which of the following taxa has the largest number of described species?

Accepted Answer

A)  Sponges 
B)  Placozoans 
C)  Ctenophorans 
D)  Cnidarians 
E)  Phoronids 
A)  Sponges 
B)  Placozoans 
C)  Ctenophorans 
D)  Cnidarians 
E)  Phoronids

Question 11

Which of the following statements about segmentation in animals is false?

Accepted Answer

A)  Segmentation facilitates the specialization of function in different parts of the body. 
B)  Segmentation results in improved control of animal movement. 
C)  Typically, evolution of individual segments within an animal occurs in conjunction with other body segments. 
D)  Segmentation may be present in both protostomes and deuterostomes. 
E)  Segmented animals are triploblastic. 
A)  Segmentation facilitates the specialization of function in different parts of the body. 
B)  Segmentation results in improved control of animal movement. 
C)  Typically, evolution of individual segments within an animal occurs in conjunction with other body segments. 
D)  Segmentation may be present in both protostomes and deuterostomes. 
E)  Segmented animals are triploblastic.

Question 12

Which of the following would likely be true of a species of bird with precocial young?

Accepted Answer

A)  Their eggs would have a small amount of yolk. 
B)  They would have to care for the young for a long period of time. 
C)  They would have a long incubation period. 
D)  They would produce many small eggs. 
E)  They would have a short incubation period followed by a long period of feeding the young. 
A)  Their eggs would have a small amount of yolk. 
B)  They would have to care for the young for a long period of time. 
C)  They would have a long incubation period. 
D)  They would produce many small eggs. 
E)  They would have a short incubation period followed by a long period of feeding the young.

Question 13

Which of the following is not a characteristic of the sponge body plan?

Accepted Answer

A)  Gastrovascular cavity 
B)  No distinct tissue layers or organs 
C)  No separation between the different cell layers 
D)  Organization around a water canal system 
E)  Asymmetry 
A)  Gastrovascular cavity 
B)  No distinct tissue layers or organs 
C)  No separation between the different cell layers 
D)  Organization around a water canal system 
E)  Asymmetry

Question 14

In their life cycles,

Accepted Answer

A)  some animals are quite different during the immature stage than during the adult stage. 
B)  animals eat at all stages. 
C)  animals eat the same food at all stages. 
D)  newborns always resemble the adults. 
E)  all newborn birds may forage on their own. 
A)  some animals are quite different during the immature stage than during the adult stage. 
B)  animals eat at all stages. 
C)  animals eat the same food at all stages. 
D)  newborns always resemble the adults. 
E)  all newborn birds may forage on their own.

Question 15

Spiral cleavage is found in which of the following taxa?

Accepted Answer

A)  Lophotrocozoans, such as earthworms 
B)  Spirilians 
C)  Ecdysozoans, such as insects 
D)  Both a and b 
E)  Both b and c 
A)  Lophotrocozoans, such as earthworms 
B)  Spirilians 
C)  Ecdysozoans, such as insects 
D)  Both a and b 
E)  Both b and c

Question 16

Which of the following is a synapomorphy for the eumetazoans?

Accepted Answer

A)  Distinct organ systems 
B)  Two embryonic cell layers 
C)  Radial symmetry 
D)  A blastopore that develops into the mouth 
E)  A blastopore that develops into the anus 
A)  Distinct organ systems 
B)  Two embryonic cell layers 
C)  Radial symmetry 
D)  A blastopore that develops into the mouth 
E)  A blastopore that develops into the anus

Question 17

The ancestor of the animal clade was probably a

Accepted Answer

A)  colonial flagellated protist. 
B)  triploblastic acoelomate with spiral cleavage. 
C)  ciliated protist. 
D)  ctenophore. 
E)  None of the above 
A)  colonial flagellated protist. 
B)  triploblastic acoelomate with spiral cleavage. 
C)  ciliated protist. 
D)  ctenophore. 
E)  None of the above

Question 18

Which one of the following feeding strategies requires a life cycle in which much time and energy are devoted to dispersal?

Accepted Answer

A)  Herbivory 
B)  Parasitism 
C)  Predation 
D)  Filter feeding 
E)  Detritivory 
A)  Herbivory 
B)  Parasitism 
C)  Predation 
D)  Filter feeding 
E)  Detritivory

Question 19

Which of the following is not a derived trait that is shared by all animals?

Accepted Answer

A)  Hox genes 
B)  The extracellular matrix molecule collagen 
C)  Tight junctions, desmosomes, and gap junctions 
D)  Bilateral symmetry 
E)  Absence of a cell wall 
A)  Hox genes 
B)  The extracellular matrix molecule collagen 
C)  Tight junctions, desmosomes, and gap junctions 
D)  Bilateral symmetry 
E)  Absence of a cell wall

Question 20

Use the following to answer questions :
Refer to the diagram below, depicting a sponge cross-section.  
-Which structure is an opening for water to enter the sponge?

Accepted Answer

The answer of Use the following to answer questions :
Refer...

Exam 31: Animal Origins and the Evolution of Body Plans

Which cnidarian group is geologically important because growth of its members can result in the formation of islands and atolls?

Segmentation of animals is important evolutionarily because it

Which of the following statements about a deuterostome is false?

Which of the following is not one of the mechanisms of movement in animals?

The Bilateria group of animals

Which of the following organisms is matched incorrectly with its feeding strategy?

Derived cnidarian classes have life cycles involving two stages: the _______ and the _______.

Use the following to answer questions : Refer to the diagram below, showing an animal cross-section. -Is this animal acoelomate, pseudocoelomate, or coelomate?

Which of the following animal stages or strategies does not contribute to the dispersal of a species?

Which of the following taxa has the largest number of described species?

Which of the following statements about segmentation in animals is false?

Which of the following would likely be true of a species of bird with precocial young?

Which of the following is not a characteristic of the sponge body plan?

In their life cycles,

Spiral cleavage is found in which of the following taxa?

Which of the following is a synapomorphy for the eumetazoans?

The ancestor of the animal clade was probably a

Which one of the following feeding strategies requires a life cycle in which much time and energy are devoted to dispersal?

Which of the following is not a derived trait that is shared by all animals?

Use the following to answer questions : Refer to the diagram below, depicting a sponge cross-section. -Which structure is an opening for water to enter the sponge?

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

Protostome Animals

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

Filters

Derived cnidarian classes have life cycles involving two stages: the _ and the _.