Question 1

Sponges differ from other animals in that they

Accepted Answer

A)  do not form true organs. 
B)  are sessile. 
C)  are triploblastic. 
D)  have trochophore larvae. 
E)  Both a and b 
A)  do not form true organs. 
B)  are sessile. 
C)  are triploblastic. 
D)  have trochophore larvae. 
E)  Both a and b

Question 2

Among protostomes, cleavage of the fertilized egg is

Accepted Answer

A)  delayed while the egg continues to mature. 
B)  always radial. 
C)  spiral, radial, or idiosyncratic. 
D)  triploblastic. 
E)  diploblastic. 
A)  delayed while the egg continues to mature. 
B)  always radial. 
C)  spiral, radial, or idiosyncratic. 
D)  triploblastic. 
E)  diploblastic.

Question 3

Animals that lack an enclosed body cavity, such as flatworms, are called _______.

Accepted Answer

The answer of Animals that lack an enclosed body cavity,...

Question 4

Many parasites evolved complex life cycles because

Accepted Answer

A)  they are too simple to disperse readily. 
B)  they are poor at recognizing new hosts. 
C)  they were driven to it by host defenses. 
D)  complex life cycles increase the probability of a parasite's transfer to a new host. 
E)  their ancestors had complex life cycles and they simply retained them. 
A)  they are too simple to disperse readily. 
B)  they are poor at recognizing new hosts. 
C)  they were driven to it by host defenses. 
D)  complex life cycles increase the probability of a parasite's transfer to a new host. 
E)  their ancestors had complex life cycles and they simply retained them.

Question 5

The sponge body plan is characterized by

Accepted Answer

A)  a mouth and digestive cavity but no muscles or nerves. 
B)  muscles and nerves but no mouth or digestive cavity. 
C)  a mouth, digestive cavity, and spicules. 
D)  muscles and spicules but no digestive cavity or nerves. 
E)  the lack of a mouth, digestive cavity, muscles, or nerves. 
A)  a mouth and digestive cavity but no muscles or nerves. 
B)  muscles and nerves but no mouth or digestive cavity. 
C)  a mouth, digestive cavity, and spicules. 
D)  muscles and spicules but no digestive cavity or nerves. 
E)  the lack of a mouth, digestive cavity, muscles, or nerves.

Question 6

The _______ is a free-swimming ciliated larva found in the radially symmetrical metazoans.

Accepted Answer

The answer of The _______ is a free-swimming ciliated larva...

Question 7

The divergence of the common ancestor of animals into the protostome and deuterostome lineages occurred during the

Accepted Answer

A)  Cenozoic. 
B)  Silurian. 
C)  Jurassic. 
D)  Cambrian. 
E)  Mesozoic. 
A)  Cenozoic. 
B)  Silurian. 
C)  Jurassic. 
D)  Cambrian. 
E)  Mesozoic.

Question 8

Which of the following is not associated with sponges?

Accepted Answer

A)  Choanocytes 
B)  Pores 
C)  Spicules 
D)  Mesoderm 
E)  Eggs 
A)  Choanocytes 
B)  Pores 
C)  Spicules 
D)  Mesoderm 
E)  Eggs

Question 9

Which of the following are not adaptations for predatory feeding?

Accepted Answer

A)  Toxins 
B)  Camouflage 
C)  Sensitive sense organs 
D)  Long and complex digestive systems 
E)  All of the above are adaptations for predatory feeding. 
A)  Toxins 
B)  Camouflage 
C)  Sensitive sense organs 
D)  Long and complex digestive systems 
E)  All of the above are adaptations for predatory feeding.

Question 10

Use the following to answer questions :
Refer to the diagram below, showing the life cycle of a cnidarian.  
-Which letter(s) point to the stage that reproduces sexually?

Accepted Answer

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

Question 11

Bilaterally symmetrical animals can be divided into two major groups that separated during the Cambrian. These two lineages differ fundamentally in their

Accepted Answer

A)  modes of reproduction. 
B)  early embryological development. 
C)  mode of obtaining and storing energy. 
D)  environmental requirements. 
E)  metabolism. 
A)  modes of reproduction. 
B)  early embryological development. 
C)  mode of obtaining and storing energy. 
D)  environmental requirements. 
E)  metabolism.

Question 12

Which of the following groups consists of members that are entirely colonial and sessile?

Accepted Answer

A)  Sea anemones 
B)  Hydrozoans 
C)  Jellyfishes 
D)  Corals 
E)  Nematocysts 
A)  Sea anemones 
B)  Hydrozoans 
C)  Jellyfishes 
D)  Corals 
E)  Nematocysts

Question 13

Which of the following features is a synapomorphy of the animals?

Accepted Answer

A)  Cells that contain chitin 
B)  Vascular systems 
C)  Similarities in their Hox genes 
D)  Bilateral symmetry 
E)  Spiral cleavage 
A)  Cells that contain chitin 
B)  Vascular systems 
C)  Similarities in their Hox genes 
D)  Bilateral symmetry 
E)  Spiral cleavage

Question 14

Use the following to answer questions :
Refer to the diagram below, showing the life cycle of a cnidarian.  
-Which letter points to the polyp stage? Is it solitary or colonial?

Accepted Answer

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

Question 15

Which of the following statements concerning nematocysts is true?

Accepted Answer

A)  They are organelles used in the capture of prey by cnidarians. 
B)  They are excretory organs in platyhelminthes. 
C)  They are reproductive cells in cnidarians. 
D)  They are ciliated cells in sponges. 
E)  They are excretory cells in sponges. 
A)  They are organelles used in the capture of prey by cnidarians. 
B)  They are excretory organs in platyhelminthes. 
C)  They are reproductive cells in cnidarians. 
D)  They are ciliated cells in sponges. 
E)  They are excretory cells in sponges.

Question 16

Which of the following statements about ctenophores and cnidarians is false?

Accepted Answer

A)  Most of them are marine organisms. 
B)  Both have radial symmetry. 
C)  Both have complete guts. 
D)  Both have feeding tentacles. 
E)  Fertilization generally takes place in open water. 
A)  Most of them are marine organisms. 
B)  Both have radial symmetry. 
C)  Both have complete guts. 
D)  Both have feeding tentacles. 
E)  Fertilization generally takes place in open water.

Question 17

What are some of the limitations imposed by a hydrostatic skeleton? Are the limitations the same for terrestrial animals?

Accepted Answer

Hydrostatic skeletons provide for contro

Question 18

Which of the following stages is not part of the typical life cycle of a butterfly?

Accepted Answer

A)  Trochophore 
B)  Egg 
C)  Pupa 
D)  Larva 
E)  Adult 
A)  Trochophore 
B)  Egg 
C)  Pupa 
D)  Larva 
E)  Adult

Question 19

Which of the following is not considered part of the body plan of an organism?

Accepted Answer

A)  The symmetry of the body 
B)  The structure of the body cavity 
C)  The segmentation of the body 
D)  External appendages 
E)  The larval morphology 
A)  The symmetry of the body 
B)  The structure of the body cavity 
C)  The segmentation of the body 
D)  External appendages 
E)  The larval morphology

Question 20

Which of the following structures is not involved with some mechanism of movement in animals?

Accepted Answer

A)  Fluid-filled coelom 
B)  Segmentation 
C)  Appendages 
D)  Cilia 
E)  All of these structures are involved in movement. 
A)  Fluid-filled coelom 
B)  Segmentation 
C)  Appendages 
D)  Cilia 
E)  All of these structures are involved in movement.

Exam 31: Animal Origins and the Evolution of Body Plans

Sponges differ from other animals in that they

Among protostomes, cleavage of the fertilized egg is

Animals that lack an enclosed body cavity, such as flatworms, are called _______.

Many parasites evolved complex life cycles because

The sponge body plan is characterized by

The _______ is a free-swimming ciliated larva found in the radially symmetrical metazoans.

The divergence of the common ancestor of animals into the protostome and deuterostome lineages occurred during the

Which of the following is not associated with sponges?

Which of the following are not adaptations for predatory feeding?

Use the following to answer questions : Refer to the diagram below, showing the life cycle of a cnidarian. -Which letter(s) point to the stage that reproduces sexually?

Bilaterally symmetrical animals can be divided into two major groups that separated during the Cambrian. These two lineages differ fundamentally in their

Which of the following groups consists of members that are entirely colonial and sessile?

Which of the following features is a synapomorphy of the animals?

Use the following to answer questions : Refer to the diagram below, showing the life cycle of a cnidarian. -Which letter points to the polyp stage? Is it solitary or colonial?

Which of the following statements concerning nematocysts is true?

Which of the following statements about ctenophores and cnidarians is false?

What are some of the limitations imposed by a hydrostatic skeleton? Are the limitations the same for terrestrial animals?

Which of the following stages is not part of the typical life cycle of a butterfly?

Which of the following is not considered part of the body plan of an organism?

Which of the following structures is not involved with some mechanism of movement in animals?

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

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