Question 1

Which of the following does not represent a correct pairing of a protostome group with one of its characteristics?

Accepted Answer

A)  Bryzoans: coelomate 
B)  Annelids: complete digestive tract 
C)  Flatworms: complete digestive tract 
D)  Rotifers: no circulatory system 
E)  Nematodes: pseudocoelomate 
A)  Bryzoans: coelomate 
B)  Annelids: complete digestive tract 
C)  Flatworms: complete digestive tract 
D)  Rotifers: no circulatory system 
E)  Nematodes: pseudocoelomate

Question 2

Which of the following are not chelicerates?

Accepted Answer

A)  Horseshoe crabs 
B)  Ticks 
C)  Mites 
D)  Isopods (sow bugs) 
E)  Spiders 
A)  Horseshoe crabs 
B)  Ticks 
C)  Mites 
D)  Isopods (sow bugs) 
E)  Spiders

Question 3

Factors that may have contributed to the remarkable evolutionary success of insects include

Accepted Answer

A)  a flexible exoskeleton. 
B)  the ability to fly. 
C)  repeated body segments. 
D)  evolution of book lungs. 
E)  presence of a pseudocoel. 
A)  a flexible exoskeleton. 
B)  the ability to fly. 
C)  repeated body segments. 
D)  evolution of book lungs. 
E)  presence of a pseudocoel.

Question 4

Which of the following would not be found in a protostome with an incomplete digestive tract (blind gut)?

Accepted Answer

A)  Central nervous system 
B)  Body cavity 
C)  Ectoderm 
D)  Endoderm 
E)  Anterior brain 
A)  Central nervous system 
B)  Body cavity 
C)  Ectoderm 
D)  Endoderm 
E)  Anterior brain

Question 5

Which crustacean group bears a superficial resemblance to mollusks?

Accepted Answer

A)  Isopods 
B)  Copepods 
C)  Barnacles 
D)  Decapods 
E)  Water fleas 
A)  Isopods 
B)  Copepods 
C)  Barnacles 
D)  Decapods 
E)  Water fleas

Question 6

Molecular data indicate that insects started to diversify about the time of the appearance of land plants about _______ years ago.

Accepted Answer

A)  450 
B)  450 thousand 
C)  4 million 
D)  450 million 
E)  4.5 billion 
A)  450 
B)  450 thousand 
C)  4 million 
D)  450 million 
E)  4.5 billion

Question 7

Flukes are dorsoventrally flattened, which accomplishes the requirement of a _______ system.

Accepted Answer

The answer of Flukes are dorsoventrally flattened, which accomplishes the...

Question 8

Which statement about ecdysozoan exoskeletons is false?

Accepted Answer

A)  They are reinforced and hardened by chitin. 
B)  They prevent dehydration in terrestrial environments. 
C)  They allow the passage of oxygen and nutrients into the animal. 
D)  They serve as areas of muscle attachment. 
E)  They require appendages for body movement. 
A)  They are reinforced and hardened by chitin. 
B)  They prevent dehydration in terrestrial environments. 
C)  They allow the passage of oxygen and nutrients into the animal. 
D)  They serve as areas of muscle attachment. 
E)  They require appendages for body movement.

Question 9

Which statement about the trochophore larva is false?

Accepted Answer

A)  It moves by beating a flagellum. 
B)  It moves by beating cilia. 
C)  It is probably present in the common ancestor of lophotrochozoans. 
D)  Movement of cilia brings plankton prey closer for ingestion. 
E)  It is free-swimming. 
A)  It moves by beating a flagellum. 
B)  It moves by beating cilia. 
C)  It is probably present in the common ancestor of lophotrochozoans. 
D)  Movement of cilia brings plankton prey closer for ingestion. 
E)  It is free-swimming.

Question 10

Which group of arthropods has the most body segments?

Accepted Answer

A)  Centipedes 
B)  Bees 
C)  Crustaceans 
D)  Chelicerates 
E)  Grasshoppers 
A)  Centipedes 
B)  Bees 
C)  Crustaceans 
D)  Chelicerates 
E)  Grasshoppers

Question 11

Parasitic wormlike ecdysozoans with unciliated, pseudocoelomate bodies and an anus would be classified as _______.

Accepted Answer

The answer of Parasitic wormlike ecdysozoans with unciliated, pseudocoelomate bodies...

Question 12

What is the unique morphological feature that contributed most to arthropod diversity?

Accepted Answer

A)  Gills 
B)  Presence of a cuticle 
C)  Jointed appendages 
D)  Presence of a coelom 
E)  Presence of a hemocoel 
A)  Gills 
B)  Presence of a cuticle 
C)  Jointed appendages 
D)  Presence of a coelom 
E)  Presence of a hemocoel

Question 13

The evolution of a chitinous exoskeleton affected many aspects of arthropod evolution.The aspect that was least affected was the

Accepted Answer

A)  division of labor among the body parts. 
B)  mode of locomotion. 
C)  pattern of growth. 
D)  system of gas exchange. 
E)  mode of digestion. 
A)  division of labor among the body parts. 
B)  mode of locomotion. 
C)  pattern of growth. 
D)  system of gas exchange. 
E)  mode of digestion.

Question 14

Which pair demonstrates modification of the same body component found in all mollusks?

Accepted Answer

A)  Tentacles of a squid and excurrent siphon of a clam 
B)  Calcareous plates of a chiton and radula of a cone snail 
C)  Swimming organ of a sea butterfly and gills of a clam 
D)  Arms of an octopus and foot of a snail 
E)  Gill of a clam and radula of a snail 
A)  Tentacles of a squid and excurrent siphon of a clam 
B)  Calcareous plates of a chiton and radula of a cone snail 
C)  Swimming organ of a sea butterfly and gills of a clam 
D)  Arms of an octopus and foot of a snail 
E)  Gill of a clam and radula of a snail

Question 15

In ecdysozoans, one of the functions of the cuticle in is ______, and it must be periodically shed in order for an animal to _______.

Accepted Answer

A)  gas exchange; reproduce 
B)  protection; reproduce 
C)  protection; exchange gases 
D)  to capture prey; grow 
E)  protection; grow 
A)  gas exchange; reproduce 
B)  protection; reproduce 
C)  protection; exchange gases 
D)  to capture prey; grow 
E)  protection; grow

Question 16

Which statement about locomotion in nematodes is true?

Accepted Answer

A)  Rhythmically beating cilia propel the animal forward. 
B)  Circular and longitudinal muscles work against each other to move the animal forward. 
C)  Longitudinal muscles contract to move the animal forward. 
D)  A series of hairs that project backward engage the substrate; back-and-forth movements move the animal forward. 
E)  Water expelled through specialized ducts moves the animal forward. 
A)  Rhythmically beating cilia propel the animal forward. 
B)  Circular and longitudinal muscles work against each other to move the animal forward. 
C)  Longitudinal muscles contract to move the animal forward. 
D)  A series of hairs that project backward engage the substrate; back-and-forth movements move the animal forward. 
E)  Water expelled through specialized ducts moves the animal forward.

Question 17

Refer to the figure.   The organism depicted is a _______, which lacks specialized organs for _______.

Accepted Answer

A)  rotifer; movement 
B)  nematode; reproduction 
C)  flatworm; gas exchange 
D)  flatworm; reproduction 
E)  bryozoan; gas exchange 
A)  rotifer; movement 
B)  nematode; reproduction 
C)  flatworm; gas exchange 
D)  flatworm; reproduction 
E)  bryozoan; gas exchange

Question 18

The _______ have bodies that are divided into two parts: a head region that bears two pairs of appendages modified to form mouthparts, and a trunk region that typically has four pairs of walking legs.

Accepted Answer

A)  chelicerates 
B)  crustaceans 
C)  hexapods 
D)  nematodes 
E)  myriapods 
A)  chelicerates 
B)  crustaceans 
C)  hexapods 
D)  nematodes 
E)  myriapods

Question 19

Which insect can tuck its wings out of the way when landing and crawl into tight places?

Accepted Answer

A)  Grasshopper 
B)  Silverfish 
C)  Damselfly 
D)  Dragonfly 
E)  Mayfly 
A)  Grasshopper 
B)  Silverfish 
C)  Damselfly 
D)  Dragonfly 
E)  Mayfly

Question 20

Which statement about rotifers is true?

Accepted Answer

A)  Bdelloid rotifers only reproduce asexually. 
B)  Rotifers propel themselves through water by muscle contraction. 
C)  Rotifers are coelomates. 
D)  Rotifers have an incomplete gut. 
E)  Rotifers have an exoskeleton. 
A)  Bdelloid rotifers only reproduce asexually. 
B)  Rotifers propel themselves through water by muscle contraction. 
C)  Rotifers are coelomates. 
D)  Rotifers have an incomplete gut. 
E)  Rotifers have an exoskeleton.

Exam 31: Protostome Animals

Which of the following does not represent a correct pairing of a protostome group with one of its characteristics?

Which of the following are not chelicerates?

Factors that may have contributed to the remarkable evolutionary success of insects include

Which of the following would not be found in a protostome with an incomplete digestive tract (blind gut)?

Which crustacean group bears a superficial resemblance to mollusks?

Molecular data indicate that insects started to diversify about the time of the appearance of land plants about _______ years ago.

Flukes are dorsoventrally flattened, which accomplishes the requirement of a _______ system.

Which statement about ecdysozoan exoskeletons is false?

Which statement about the trochophore larva is false?

Which group of arthropods has the most body segments?

Parasitic wormlike ecdysozoans with unciliated, pseudocoelomate bodies and an anus would be classified as _______.

What is the unique morphological feature that contributed most to arthropod diversity?

The evolution of a chitinous exoskeleton affected many aspects of arthropod evolution.The aspect that was least affected was the

Which pair demonstrates modification of the same body component found in all mollusks?

In ecdysozoans, one of the functions of the cuticle in is ______, and it must be periodically shed in order for an animal to _______.

Which statement about locomotion in nematodes is true?

Refer to the figure. The organism depicted is a _______, which lacks specialized organs for _______.

The _______ have bodies that are divided into two parts: a head region that bears two pairs of appendages modified to form mouthparts, and a trunk region that typically has four pairs of walking legs.

Which insect can tuck its wings out of the way when landing and crawl into tight places?

Which statement about rotifers is true?

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

Animal Origins and the Evolution of Body Plans

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

In ecdysozoans, one of the functions of the cuticle in is , and it must be periodically shed in order for an animal to _.

Refer to the figure. The organism depicted is a _, which lacks specialized organs for _.