Question 1

Coordinated movement in animals is achieved because of

Accepted Answer

A)  a peritoneum. 
B)  a central nervous system. 
C)  a coelom. 
D)  radial symmetry. 
E)  a dorsal surface. 
A)  a peritoneum. 
B)  a central nervous system. 
C)  a coelom. 
D)  radial symmetry. 
E)  a dorsal surface.

Question 2

With a fixed amount of available energy, there is a trade-off between the number of offspring produced and the energy resources each offspring receives from its mother.Given this constraint, a female animal can produce

Accepted Answer

A)  many small eggs. 
B)  exactly two eggs. 
C)  many large eggs. 
D)  equal numbers of large and small eggs. 
E)  unlimited numbers of eggs. 
A)  many small eggs. 
B)  exactly two eggs. 
C)  many large eggs. 
D)  equal numbers of large and small eggs. 
E)  unlimited numbers of eggs.

Question 3

Which of the following cannot be used as a clue to the evolutionary relationships of animals?

Accepted Answer

A)  The fossil record 
B)  Patterns of embryonic development 
C)  Comparative morphology and physiology 
D)  Genomic sequence patterns 
E)  Size and number of offspring 
A)  The fossil record 
B)  Patterns of embryonic development 
C)  Comparative morphology and physiology 
D)  Genomic sequence patterns 
E)  Size and number of offspring

Question 4

Refer to the figure, which shows three animal body cavities.   Animal A would be described as _______ because it lacks a body cavity.

Accepted Answer

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

Question 5

The bilaterally symmetrical larval form of many crustaceans is called a

Accepted Answer

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

Question 6

Which example does not illustrate an evolutionary trade-off in a life cycle?

Accepted Answer

A)  Production of a large number of large eggs 
B)  Production of defensive structures at the expense of growth 
C)  Production of a small number of large eggs 
D)  Larger energy stores in eggs of precocial young 
E)  Inability of filter feeders to capture large prey items 
A)  Production of a large number of large eggs 
B)  Production of defensive structures at the expense of growth 
C)  Production of a small number of large eggs 
D)  Larger energy stores in eggs of precocial young 
E)  Inability of filter feeders to capture large prey items

Question 7

Animals with a coelom have an advantage over other triploblastic animals because they

Accepted Answer

A)  have better control over movement than other triploblasts. 
B)  have more appendages than other triploblasts. 
C)  show less cephalization than other triploblasts. 
D)  lack mesenchyme, providing more space for internal organs. 
E)  possess a nerve net, which enhances their ability to feed. 
A)  have better control over movement than other triploblasts. 
B)  have more appendages than other triploblasts. 
C)  show less cephalization than other triploblasts. 
D)  lack mesenchyme, providing more space for internal organs. 
E)  possess a nerve net, which enhances their ability to feed.

Question 8

Filter feeders

Accepted Answer

A)  include sponges. 
B)  generally capture large prey. 
C)  are all diploblastic organisms. 
D)  are all mobile. 
E)  are all sessile. 
A)  include sponges. 
B)  generally capture large prey. 
C)  are all diploblastic organisms. 
D)  are all mobile. 
E)  are all sessile.

Question 9

Which of the following statements is true?

Accepted Answer

A)  The deuterostome mouth originates from the blastopore. 
B)  Diploblastic organisms have two embryonic layers: an outer ectoderm and an inner mesoderm. 
C)  Ctenophores have two embryonic layers: an outer endoderm and an inner ectoderm. 
D)  The protostome mouth originates from a second opening after formation of the blastopore. 
E)  Triploblastic organisms have three embryonic layers: an outer ectoderm, a mesoderm, and an inner endoderm. 
A)  The deuterostome mouth originates from the blastopore. 
B)  Diploblastic organisms have two embryonic layers: an outer ectoderm and an inner mesoderm. 
C)  Ctenophores have two embryonic layers: an outer endoderm and an inner ectoderm. 
D)  The protostome mouth originates from a second opening after formation of the blastopore. 
E)  Triploblastic organisms have three embryonic layers: an outer ectoderm, a mesoderm, and an inner endoderm.

Question 10

Which of the following can function without a digestive system?

Accepted Answer

A)  Ectoparasites 
B)  Endoparasites 
C)  Detritivores 
D)  Herbivores 
E)  Carnivores 
A)  Ectoparasites 
B)  Endoparasites 
C)  Detritivores 
D)  Herbivores 
E)  Carnivores

Question 11

Refer to the figure.   Which statement concerning the two forms shown is true?

Accepted Answer

A)  They are different stages in the life cycle of the same organism. 
B)  Both are adult forms. 
C)  They function in dispersal of the species. 
D)  Both are bilaterally symmetrical. 
E)  Both are radially symmetrical. 
A)  They are different stages in the life cycle of the same organism. 
B)  Both are adult forms. 
C)  They function in dispersal of the species. 
D)  Both are bilaterally symmetrical. 
E)  Both are radially symmetrical.

Question 12

_______ capture and eat other animals.

Accepted Answer

A)  Filter feeders 
B)  Herbivores 
C)  Predators 
D)  Parasites 
E)  Detritivores 
A)  Filter feeders 
B)  Herbivores 
C)  Predators 
D)  Parasites 
E)  Detritivores

Question 13

Refer to the figure, which shows three animal body cavities.   Animal B would have greater control over movement than animal A because of a(n) _______.

Accepted Answer

hydrostati

Question 14

The body cavity of coelomate animals develops within the

Accepted Answer

A)  endoderm. 
B)  ectoderm. 
C)  mesoderm. 
D)  pseudocoel. 
E)  mesoglea. 
A)  endoderm. 
B)  ectoderm. 
C)  mesoderm. 
D)  pseudocoel. 
E)  mesoglea.

Question 15

Ctenophores differ from cnidarians in that ctenophores _______, while cnidarians _______.

Accepted Answer

A)  are marine; are freshwater organisms 
B)  have a complete gut; have a gastrovascular cavity 
C)  move by muscular contractions; move by beating cilia 
D)  have a gastrovascular cavity; have a complete gut 
E)  are radially symmetrical; are asymmetrical 
A)  are marine; are freshwater organisms 
B)  have a complete gut; have a gastrovascular cavity 
C)  move by muscular contractions; move by beating cilia 
D)  have a gastrovascular cavity; have a complete gut 
E)  are radially symmetrical; are asymmetrical

Question 16

Under what environmental circumstances might having precocial young be a detrimental adaptation?

Accepted Answer

In environments where incubation time is

Question 17

Organisms that feed on decomposing organic matter are known as _______.

Accepted Answer

The answer of Organisms that feed on decomposing organic matter...

Question 18

Which of the following statements about coelomate animals is false?

Accepted Answer

A)  Coelomates are triploblastic. 
B)  There is an inner layer of mesoderm surrounding the internal organs in coelomates. 
C)  The body cavity of coelomates is filled with mesenchyme. 
D)  The body cavity of coelomates can act as a hydrostatic skeleton. 
E)  An earthworm is an example of a coelomate. 
A)  Coelomates are triploblastic. 
B)  There is an inner layer of mesoderm surrounding the internal organs in coelomates. 
C)  The body cavity of coelomates is filled with mesenchyme. 
D)  The body cavity of coelomates can act as a hydrostatic skeleton. 
E)  An earthworm is an example of a coelomate.

Question 19

As sea urchin embryos develop, the blastopore becomes the _______ of the larva.

Accepted Answer

The answer of As sea urchin embryos develop, the blastopore...

Question 20

When a ctenophore captures prey, it retracts its tentacles toward its mouth.This is accomplished through muscular contractions directed by the _______.

Accepted Answer

The answer of When a ctenophore captures prey, it retracts...

Exam 30: Animal Origins and the Evolution of Body Plans

Coordinated movement in animals is achieved because of

With a fixed amount of available energy, there is a trade-off between the number of offspring produced and the energy resources each offspring receives from its mother.Given this constraint, a female animal can produce

Which of the following cannot be used as a clue to the evolutionary relationships of animals?

Refer to the figure, which shows three animal body cavities. Animal A would be described as _______ because it lacks a body cavity.

The bilaterally symmetrical larval form of many crustaceans is called a

Which example does not illustrate an evolutionary trade-off in a life cycle?

Animals with a coelom have an advantage over other triploblastic animals because they

Filter feeders

Which of the following statements is true?

Which of the following can function without a digestive system?

Refer to the figure. Which statement concerning the two forms shown is true?

_______ capture and eat other animals.

Refer to the figure, which shows three animal body cavities. Animal B would have greater control over movement than animal A because of a(n) _______.

The body cavity of coelomate animals develops within the

Ctenophores differ from cnidarians in that ctenophores _______, while cnidarians _______.

Under what environmental circumstances might having precocial young be a detrimental adaptation?

Organisms that feed on decomposing organic matter are known as _______.

Which of the following statements about coelomate animals is false?

As sea urchin embryos develop, the blastopore becomes the _______ of the larva.

When a ctenophore captures prey, it retracts its tentacles toward its mouth.This is accomplished through muscular contractions directed by 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 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

Filters

Ctenophores differ from cnidarians in that ctenophores _, while cnidarians _.