Question 1

The common ancestor of all animals is/are the:

Accepted Answer

A)  yeast. 
B)  rotifers. 
C)  sponges. 
D)  bacteria. 
E)  choanoflagellates. 
A)  yeast. 
B)  rotifers. 
C)  sponges. 
D)  bacteria. 
E)  choanoflagellates. E

Question 2

Which of the following deuterostomes has a proboscis?

Accepted Answer

A)  Feather stars 
B)  Sea cucumbers 
C)  Acorn worms 
D)  Snakes 
E)  Crows 
A)  Feather stars 
B)  Sea cucumbers 
C)  Acorn worms 
D)  Snakes 
E)  Crows C

Question 3

Which of the following appears to have evolved independently in different animal taxa, and therefore its presence is not considered a useful characteristic for determining phylogeny?

Accepted Answer

A)  Ectoderm 
B)  Pseudocoelom 
C)  Endoderm 
D)  Exoderm 
E)  Mesoderm 
A)  Ectoderm 
B)  Pseudocoelom 
C)  Endoderm 
D)  Exoderm 
E)  Mesoderm B

Question 4

Match between columns
                        Premises: Indeterminate cleavage

Accepted Answer

The Answer of protostomes and deuterostomes is...

Question 5

What are the two clades of the protostomes?

Accepted Answer

A)  Eumetazoa and Metazoa 
B)  Protostomia and Bilateria 
C)  Bilateria and Deutersostomia 
D)  Lophotrochozoa and Ecdysozoa 
E)  Lophotrochozoa and Deutrerostomia 
A)  Eumetazoa and Metazoa 
B)  Protostomia and Bilateria 
C)  Bilateria and Deutersostomia 
D)  Lophotrochozoa and Ecdysozoa 
E)  Lophotrochozoa and Deutrerostomia

Question 6

You are told that the digestive tract of the animal you are studying developed an anus before a mouth. You realize that you may be looking at a(n):

Accepted Answer

A)  earthworm. 
B)  insect. 
C)  sponge. 
D)  clam. 
E)  sea star. 
A)  earthworm. 
B)  insect. 
C)  sponge. 
D)  clam. 
E)  sea star.

Question 7

What is the key characteristic that defines the Ecdysozoa clade?

Accepted Answer

A)  The animal molts. 
B)  The animal is a deuterostome. 
C)  The animal has motile larvae. 
D)  The animal has bilateral symmetry. 
E)  The animal develops three tissue layers. 
A)  The animal molts. 
B)  The animal is a deuterostome. 
C)  The animal has motile larvae. 
D)  The animal has bilateral symmetry. 
E)  The animal develops three tissue layers.

Question 8

What is the common ancestor of animals and how did they evolve into animals?

Accepted Answer

Choanoflagellates are a group of protist

Question 9

One true characteristic of all animals is that they:

Accepted Answer

A)  are mobile. 
B)  have a brain. 
C)  are heterotrophs. 
D)  have an organ system. 
E)  only show sexual reproduction. 
A)  are mobile. 
B)  have a brain. 
C)  are heterotrophs. 
D)  have an organ system. 
E)  only show sexual reproduction.

Question 10

Match between columns
                        Premises: Blastopore becomes anus

Accepted Answer

The Answer of protostomes and deuterostomes is...

Question 11

Your abdominal cavity, which contains most of your major organs, is a:

Accepted Answer

A)  coelom lined by endoderm and mesoderm. 
B)  pseudocoelom lined by mesoderm. 
C)  pseudocoelom lined by endoderm. 
D)  coelom lined by ectoderm. 
E)  coelom lined by mesoderm. 
A)  coelom lined by endoderm and mesoderm. 
B)  pseudocoelom lined by mesoderm. 
C)  pseudocoelom lined by endoderm. 
D)  coelom lined by ectoderm. 
E)  coelom lined by mesoderm.

Question 12

Which of the following are NOT protostomes?

Accepted Answer

A)  Clams 
B)  Earthworms 
C)  Crabs 
D)  Spiders 
E)  Milkfish 
A)  Clams 
B)  Earthworms 
C)  Crabs 
D)  Spiders 
E)  Milkfish

Question 13

The cephalic end of an animal is toward its head.

Accepted Answer

A) True 
 B)False

Question 14

A marine invertebrate placed into freshwater would have difficulty surviving because:

Accepted Answer

A)  it would not be able to obtain food. 
B)  it would have difficulty with buoyancy. 
C)  it would have difficulty with osmoregulation. 
D)  it would not experience the temperature stability found in the oceans. 
E)  it would not be able to obtain oxygen due to the absence of waves in the water. 
A)  it would not be able to obtain food. 
B)  it would have difficulty with buoyancy. 
C)  it would have difficulty with osmoregulation. 
D)  it would not experience the temperature stability found in the oceans. 
E)  it would not be able to obtain oxygen due to the absence of waves in the water.

Question 15

The inner germ layer, or ectoderm, forms which of the following structures?

Accepted Answer

A)  Outer covering of the body, as well as nervous tissue 
B)  Lining of digestive structures 
C)  Muscles 
D)  Skeletal structures 
E)  Circulatory system (when present) 
A)  Outer covering of the body, as well as nervous tissue 
B)  Lining of digestive structures 
C)  Muscles 
D)  Skeletal structures 
E)  Circulatory system (when present)

Question 16

Which of the following is characteristic to most protostomes?

Accepted Answer

A)  The blastophore typically develops into the anus. 
B)  There is no blastophore. 
C)  The developmental fate of the embryonic cells tends to occur via indeterminate cleavage. 
D)  Cell division tends to be via spiral cleavage. 
E)  The blastophore typically develops into the brain. 
A)  The blastophore typically develops into the anus. 
B)  There is no blastophore. 
C)  The developmental fate of the embryonic cells tends to occur via indeterminate cleavage. 
D)  Cell division tends to be via spiral cleavage. 
E)  The blastophore typically develops into the brain.

Question 17

Which was the primary challenge animals faced in adapting to life on land?

Accepted Answer

A)  The presence of new predators 
B)  Being able to adapt to move on land 
C)  The need for more oxygen to do work 
D)  Finding a mate in the new environment 
E)  The desiccating effect of the atmosphere 
A)  The presence of new predators 
B)  Being able to adapt to move on land 
C)  The need for more oxygen to do work 
D)  Finding a mate in the new environment 
E)  The desiccating effect of the atmosphere

Question 18

Match between columns
                        Premises: Radial cleavage

Accepted Answer

The Answer of deuterostomes and protostomes is...

Question 19

The vast majority of bilateral animals have a fluid-filled body cavity, or coelom. Which of the following is an exception?

Accepted Answer

A)  Horses 
B)  Sparrows 
C)  Spiders 
D)  Flatworms 
E)  Frogs 
A)  Horses 
B)  Sparrows 
C)  Spiders 
D)  Flatworms 
E)  Frogs

Question 20

How can radial symmetry be an advantage to slow-moving or sessile marine organisms?

Accepted Answer

Radial symmetry allows equal distributio

Exam 30: An Introduction to Animal Diversity

The common ancestor of all animals is/are the:

Which of the following deuterostomes has a proboscis?

Which of the following appears to have evolved independently in different animal taxa, and therefore its presence is not considered a useful characteristic for determining phylogeny?

What are the two clades of the protostomes?

You are told that the digestive tract of the animal you are studying developed an anus before a mouth. You realize that you may be looking at a(n):

What is the key characteristic that defines the Ecdysozoa clade?

What is the common ancestor of animals and how did they evolve into animals?

One true characteristic of all animals is that they:

Your abdominal cavity, which contains most of your major organs, is a:

Which of the following are NOT protostomes?

The cephalic end of an animal is toward its head.

A marine invertebrate placed into freshwater would have difficulty surviving because:

The inner germ layer, or ectoderm, forms which of the following structures?

Which of the following is characteristic to most protostomes?

Which was the primary challenge animals faced in adapting to life on land?

The vast majority of bilateral animals have a fluid-filled body cavity, or coelom. Which of the following is an exception?

How can radial symmetry be an advantage to slow-moving or sessile marine organisms?

A View of Life

Atoms and Molecules: the Chemical Basis of Life

The Chemistry of Life: Organic Compounds

Organization of the Cell

Biological Membranes

Cell Communication

Energy and Metabolism

How Cells Make Atp: Energy-Releasing Pathways

Photosynthesis: Capturing Light Energy

Chromosomes, Mitosis, and Meiosis

The Basic Principles of Heredity

DNA: The Carrier of Genetic Information

Gene Expression

Gene Regulation

DNA Technology and Genomics

Human Genetics and the Human Genome

Developmental Genetics

Introduction to Darwinian Evolution

Evolutionary Change in Populations

Speciation and Macroevolution

The Origin and Evolutionary History of Life

The Evolution of Primates

Understanding Diversity: Systematics

Viruses and Subviral Agents

Bacteria and Archaea

Protists

Seedless Plants

Seed Plants

The Fungi

Sponges, Cnidarians, Ctenophores, and Protostomes

The Deuterostomes

Plant Structure, Growth, and Development

Leaf Structure and Function

Stem Structure and Transport

Roots and Mineral Nutrition

Reproduction in Flowering Plants

Plant Developmental Responses to External and Internal Signals

Animal Structure and Function: an Introduction

Protection, Support, and Movement

Neural Signaling

Neural Regulation

Sensory Systems

Internal Transport

The Immune System: Internal Defense

Gas Exchange

Processing Food and Nutrition

Osmoregulation and Disposal of Metabolic Wastes

Endocrine Regulation

Reproduction

Animal Development

Animal Behavior

Introduction to Ecology: Population Ecology

Community Ecology

Ecosystems and the Biosphere

Ecology and the Geography of Life

Biological Diversity and Conservation Biology

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