Question 1

The _______ is not a dispersal form.

Accepted Answer

A)  larval form of mollusks 
B)  larval form of crustaceans 
C)  larval form of butterflies 
D)  small eggs and sperm of sessile animals 
E)  larval form of polychaete worms 
A)  larval form of mollusks 
B)  larval form of crustaceans 
C)  larval form of butterflies 
D)  small eggs and sperm of sessile animals 
E)  larval form of polychaete worms C

Question 2

Refer to the table, which compares 27 amino acid positions for ten different species.   Which two character states are the same only in the outgroup and the sponge?

Accepted Answer

A)  2 and 22 
B)  5 and 25 
C)  7 and 14 
D)  9 and 17 
E)  12 and 27 
A)  2 and 22 
B)  5 and 25 
C)  7 and 14 
D)  9 and 17 
E)  12 and 27 C

Question 3

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 A

Question 4

Which of the following can be cited as evidence for the bilaterians as a clade?

Accepted Answer

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

Question 5

Which of the following statements about ctenophore movement is true?

Accepted Answer

A)  Independent muscle contractions in individual segments propel ctenophores through the water. 
B)  The ciliated trochophore stage allows for dispersal. 
C)  Beating cilia along comblike plates propel ctenophores through the water. 
D)  Compressions of the hydrostatic skeleton allow ctenophores to slowly glide through the water. 
E)  The peritoneum is directed by the central nervous system, to provide pulsating contractions that propel the ctenophore. 
A)  Independent muscle contractions in individual segments propel ctenophores through the water. 
B)  The ciliated trochophore stage allows for dispersal. 
C)  Beating cilia along comblike plates propel ctenophores through the water. 
D)  Compressions of the hydrostatic skeleton allow ctenophores to slowly glide through the water. 
E)  The peritoneum is directed by the central nervous system, to provide pulsating contractions that propel the ctenophore.

Question 6

A lion, which has sharp teeth and claws, has the feeding strategy of a _______.

Accepted Answer

The answer of A lion, which has sharp teeth and...

Question 7

Refer to the figure, which shows three animal body cavities.   The body cavity of animal C would have internal organs completely enclosed in a _______.

Accepted Answer

The answer of Refer to the figure, which shows three...

Question 8

Which type of symmetry is most often seen in an animal that is mobile and exhibits cephalization?

Accepted Answer

A)  Asymmetry 
B)  Spherical symmetry 
C)  Radial symmetry 
D)  Radial symmetry with identical halves 
E)  Bilateral symmetry 
A)  Asymmetry 
B)  Spherical symmetry 
C)  Radial symmetry 
D)  Radial symmetry with identical halves 
E)  Bilateral symmetry

Question 9

A female frog can lay large numbers of eggs but these eggs have small energy stores.This demonstrates a reproductive

Accepted Answer

A)  advantage. 
B)  barrier. 
C)  impairment. 
D)  benefit. 
E)  trade-off. 
A)  advantage. 
B)  barrier. 
C)  impairment. 
D)  benefit. 
E)  trade-off.

Question 10

The _______ (jellyfish) are marine cnidarians with a thick, firm mesoglea within the medusa.

Accepted Answer

The answer of The _______ (jellyfish) are marine cnidarians with...

Question 11

Characteristics unique to animals include

Accepted Answer

A)  a nervous system. 
B)  unicellularity. 
C)  heterotrophic metabolism. 
D)  multicellularity. 
E)  external digestion. 
A)  a nervous system. 
B)  unicellularity. 
C)  heterotrophic metabolism. 
D)  multicellularity. 
E)  external digestion.

Question 12

Which statement concerning cleavage is false?

Accepted Answer

A)  Incomplete cleavage is thought to be the ancestral condition for animal embryos. 
B)  Lophotrochozoans with spiral cleavage are sometimes known as spiralians. 
C)  Reptiles are characterized by incomplete cleavage. 
D)  The idiosyncratic cleavage pattern of most ecdysozoans is neither radial nor spiral. 
E)  Cleavage patterns can be useful for characterizing major animal groups. 
A)  Incomplete cleavage is thought to be the ancestral condition for animal embryos. 
B)  Lophotrochozoans with spiral cleavage are sometimes known as spiralians. 
C)  Reptiles are characterized by incomplete cleavage. 
D)  The idiosyncratic cleavage pattern of most ecdysozoans is neither radial nor spiral. 
E)  Cleavage patterns can be useful for characterizing major animal groups.

Question 13

Cephalization is most commonly associated with

Accepted Answer

A)  spherical symmetry. 
B)  radial symmetry. 
C)  sessile animals. 
D)  bilateral symmetry. 
E)  lophophorate animals. 
A)  spherical symmetry. 
B)  radial symmetry. 
C)  sessile animals. 
D)  bilateral symmetry. 
E)  lophophorate animals.

Question 14

The placozoans are considered to be the sister group to which of the following taxa?

Accepted Answer

A)  Ctenophores 
B)  Cnidarians 
C)  Calcareous sponges 
D)  Demosponges 
E)  Glass sponges 
A)  Ctenophores 
B)  Cnidarians 
C)  Calcareous sponges 
D)  Demosponges 
E)  Glass sponges

Question 15

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

Accepted Answer

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

Question 16

The simplest type of symmetry, in which body parts radiate outward from a central point, is called _______ symmetry.It is widespread among the protists.

Accepted Answer

The answer of The simplest type of symmetry, in which...

Question 17

The bilaterian 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 18

Which characteristic would not likely be found in an animal with a central nervous system?

Accepted Answer

A)  Cephalization 
B)  Segmentation 
C)  Bilateral symmetry 
D)  Nerve net 
E)  Coelom 
A)  Cephalization 
B)  Segmentation 
C)  Bilateral symmetry 
D)  Nerve net 
E)  Coelom

Question 19

Which of the following would be an example of enhanced movement due to appendages?

Accepted Answer

A)  Modified limbs that allow animals to use powered flight 
B)  A fluid-filled body cavity that supports an animal on land 
C)  A distinct head region with concentration of sensory organs 
D)  Multiple repeated body segments 
E)  Possession of a nerve net 
A)  Modified limbs that allow animals to use powered flight 
B)  A fluid-filled body cavity that supports an animal on land 
C)  A distinct head region with concentration of sensory organs 
D)  Multiple repeated body segments 
E)  Possession of a nerve net

Question 20

Derived cnidarian classes have life cycles involving two stages: the sessile _______ and the free-swimming medusa.

Accepted Answer

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

Exam 30: Animal Origins and the Evolution of Body Plans

The _______ is not a dispersal form.

Refer to the table, which compares 27 amino acid positions for ten different species. Which two character states are the same only in the outgroup and the sponge?

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

Which of the following can be cited as evidence for the bilaterians as a clade?

Which of the following statements about ctenophore movement is true?

A lion, which has sharp teeth and claws, has the feeding strategy of a _______.

Refer to the figure, which shows three animal body cavities. The body cavity of animal C would have internal organs completely enclosed in a _______.

Which type of symmetry is most often seen in an animal that is mobile and exhibits cephalization?

A female frog can lay large numbers of eggs but these eggs have small energy stores.This demonstrates a reproductive

The _______ (jellyfish) are marine cnidarians with a thick, firm mesoglea within the medusa.

Characteristics unique to animals include

Which statement concerning cleavage is false?

Cephalization is most commonly associated with

The placozoans are considered to be the sister group to which of the following taxa?

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

The simplest type of symmetry, in which body parts radiate outward from a central point, is called _______ symmetry.It is widespread among the protists.

The bilaterian group of animals

Which characteristic would not likely be found in an animal with a central nervous system?

Which of the following would be an example of enhanced movement due to appendages?

Derived cnidarian classes have life cycles involving two stages: the sessile _______ and the free-swimming medusa.

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

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, 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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