Question 1

Which of the following is not associated with a parasitic lifestyle as seen in tapeworms and flukes?

Accepted Answer

A)  Complex digestive systems 
B)  Flattened body 
C)  Life cycles with several larval stages 
D)  Life cycles with multiple hosts 
E)  Reduced gastrovascular cavity 
A)  Complex digestive systems 
B)  Flattened body 
C)  Life cycles with several larval stages 
D)  Life cycles with multiple hosts 
E)  Reduced gastrovascular cavity

Question 2

Which of the following statements about oligochaetes is false?

Accepted Answer

A)  They are hermaphroditic. 
B)  They have separate nerve centers called ganglia. 
C)  They have a segmented coelom. 
D)  They have serially repeated organs. 
E)  Their zygotes undergo radial cleavage. 
A)  They are hermaphroditic. 
B)  They have separate nerve centers called ganglia. 
C)  They have a segmented coelom. 
D)  They have serially repeated organs. 
E)  Their zygotes undergo radial cleavage.

Question 3

Many lophotrochozoans have a type of free-living larva called a _______.

Accepted Answer

The answer of Many lophotrochozoans have a type of free-living...

Question 4

An animal with bilateral symmetry, a pseudocoelom, a tubular digestive system, and a thick, multilayer cuticle is most likely

Accepted Answer

A)  an arrow worm. 
B)  a flatworm. 
C)  a nematode. 
D)  a polychaete. 
E)  an annelid. 
A)  an arrow worm. 
B)  a flatworm. 
C)  a nematode. 
D)  a polychaete. 
E)  an annelid.

Question 5

The sister group of the kinorhynchs and loriciferans are the

Accepted Answer

A)  nematodes. 
B)  crustaceans. 
C)  priapulids. 
D)  chelicerates. 
E)  tardigrades. 
A)  nematodes. 
B)  crustaceans. 
C)  priapulids. 
D)  chelicerates. 
E)  tardigrades.

Question 6

Animals with thin cuticles are generally restricted to moist habitats because

Accepted Answer

A)  the thin cuticle causes water to be lost across the body surface. 
B)  there are fewer predators in these habitats. 
C)  these animals rely on flowing water to bring them food. 
D)  All of the above 
E)  None of the above 
A)  the thin cuticle causes water to be lost across the body surface. 
B)  there are fewer predators in these habitats. 
C)  these animals rely on flowing water to bring them food. 
D)  All of the above 
E)  None of the above

Question 7

Which of the following is not one of the traits that unite the protostomes?

Accepted Answer

A)  Dorsal nervous system 
B)  Anterior brain 
C)  Bilaterally symmetrical body plan 
D)  Development of a mouth from a blastopore (in many species) 
E)  All of the above 
A)  Dorsal nervous system 
B)  Anterior brain 
C)  Bilaterally symmetrical body plan 
D)  Development of a mouth from a blastopore (in many species) 
E)  All of the above

Question 8

Insects whose hatchlings are sufficiently similar in form to adults to be recognizable are said to have

Accepted Answer

A)  instars. 
B)  neopterous development. 
C)  accelerated development. 
D)  incomplete metamorphosis. 
E)  complete metamorphosis. 
A)  instars. 
B)  neopterous development. 
C)  accelerated development. 
D)  incomplete metamorphosis. 
E)  complete metamorphosis.

Question 9

Because a rigid exoskeleton prevents wormlike movement, arthropods have _______ that can be manipulated by muscles.

Accepted Answer

The answer of Because a rigid exoskeleton prevents wormlike movement,...

Question 10

One clade of polychaetes, the pogonophorans,

Accepted Answer

A)  were discovered in the nineteenth century. 
B)  live in high densities in shallow waters. 
C)  have a well developed digestive tract. 
D)  can harbor bacteria that oxidize hydrogen sulfide. 
E)  Both c and d 
A)  were discovered in the nineteenth century. 
B)  live in high densities in shallow waters. 
C)  have a well developed digestive tract. 
D)  can harbor bacteria that oxidize hydrogen sulfide. 
E)  Both c and d

Question 11

Phoronids

Accepted Answer

A)  are species-rich. 
B)  secrete tubes made of chitin. 
C)  are free-living. 
D)  do not have a lophophore. 
E)  are greater than 50 cm in length. 
A)  are species-rich. 
B)  secrete tubes made of chitin. 
C)  are free-living. 
D)  do not have a lophophore. 
E)  are greater than 50 cm in length.

Question 12

The centipedes and millipedes belong to which group?

Accepted Answer

A)  Hexapods 
B)  Arachnids 
C)  Myriapods 
D)  Annelids 
E)  Chelicerates 
A)  Hexapods 
B)  Arachnids 
C)  Myriapods 
D)  Annelids 
E)  Chelicerates

Question 13

Insects exchange gases by means of air sacs and tubular channels called _______.

Accepted Answer

The answer of Insects exchange gases by means of air...

Question 14

Some cephalopods have modified their excurrent siphon and mantle to allow them to

Accepted Answer

A)  ingest large prey. 
B)  alter their buoyancy. 
C)  move rapidly through the water. 
D)  attach to a substrate. 
E)  become parasitic. 
A)  ingest large prey. 
B)  alter their buoyancy. 
C)  move rapidly through the water. 
D)  attach to a substrate. 
E)  become parasitic.

Question 15

You discover a new organism with the following characteristics: the body is wormlike and has a fluid-filled cavity, the feeding organ looks like a proboscis, and there is a complete digestive tract. The organism is probably a(n)

Accepted Answer

A)  annelid. 
B)  flatworm. 
C)  nematode. 
D)  ribbon worm. 
E)  horsehair worm. 
A)  annelid. 
B)  flatworm. 
C)  nematode. 
D)  ribbon worm. 
E)  horsehair worm.

Question 16

Hexapods and most crustaceans have tripartite body plans that include a(n) _______, a(n) _______, and a(n) _______.

Accepted Answer

head; thor

Question 17

Arthropods are the most numerous animals on Earth. Which of following traits likely does not contribute to their success?

Accepted Answer

A)  A rigid exoskeleton 
B)  Jointed appendages 
C)  Waterproofing by chitin 
D)  Molting 
E)  The specialization of different appendages 
A)  A rigid exoskeleton 
B)  Jointed appendages 
C)  Waterproofing by chitin 
D)  Molting 
E)  The specialization of different appendages

Question 18

Which of the following statements about exoskeletons is true?

Accepted Answer

A)  They are a highly efficient means of anchoring muscles, thereby providing more efficient movement. 
B)  They provide protection from predators. 
C)  They must be shed for the animal to grow, and during the shedding period the animal is vulnerable to predators. 
D)  They provide support for walking on dry land. 
E)  All of the above 
A)  They are a highly efficient means of anchoring muscles, thereby providing more efficient movement. 
B)  They provide protection from predators. 
C)  They must be shed for the animal to grow, and during the shedding period the animal is vulnerable to predators. 
D)  They provide support for walking on dry land. 
E)  All of the above

Question 19

Nautiluses control their buoyancy by

Accepted Answer

A)  adjusting salt concentrations in their blood. 
B)  forcibly expelling water from the mantle. 
C)  pumping water and gases in and out of internal chambers. 
D)  using the complex sensory organs in their heads. 
E)  swimming rapidly. 
A)  adjusting salt concentrations in their blood. 
B)  forcibly expelling water from the mantle. 
C)  pumping water and gases in and out of internal chambers. 
D)  using the complex sensory organs in their heads. 
E)  swimming rapidly.

Question 20

Which of the following ecdysozoan groups is extinct?

Accepted Answer

A)  Chelicerates 
B)  Crustaceans 
C)  Tardigrades 
D)  Trilobites 
E)  Onychophorans 
A)  Chelicerates 
B)  Crustaceans 
C)  Tardigrades 
D)  Trilobites 
E)  Onychophorans

Exam 32: Protostome Animals

Which of the following is not associated with a parasitic lifestyle as seen in tapeworms and flukes?

Which of the following statements about oligochaetes is false?

Many lophotrochozoans have a type of free-living larva called a _______.

An animal with bilateral symmetry, a pseudocoelom, a tubular digestive system, and a thick, multilayer cuticle is most likely

The sister group of the kinorhynchs and loriciferans are the

Animals with thin cuticles are generally restricted to moist habitats because

Which of the following is not one of the traits that unite the protostomes?

Insects whose hatchlings are sufficiently similar in form to adults to be recognizable are said to have

Because a rigid exoskeleton prevents wormlike movement, arthropods have _______ that can be manipulated by muscles.

One clade of polychaetes, the pogonophorans,

Phoronids

The centipedes and millipedes belong to which group?

Insects exchange gases by means of air sacs and tubular channels called _______.

Some cephalopods have modified their excurrent siphon and mantle to allow them to

You discover a new organism with the following characteristics: the body is wormlike and has a fluid-filled cavity, the feeding organ looks like a proboscis, and there is a complete digestive tract. The organism is probably a(n)

Hexapods and most crustaceans have tripartite body plans that include a(n) _______, a(n) _______, and a(n) _______.

Arthropods are the most numerous animals on Earth. Which of following traits likely does not contribute to their success?

Which of the following statements about exoskeletons is true?

Nautiluses control their buoyancy by

Which of the following ecdysozoan groups is extinct?

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

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 and Nervous Systems

Sensory Systems

The Mammalian Nervous System: Structure and Higher Function

Musculoskeletal Systems

Gas Exchange in Animals

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Nutrition, Digestion, and Absorption

Salt and Water Balance and Nitrogen

Animal Behavior

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Hexapods and most crustaceans have tripartite body plans that include a(n) ___, a(n) _, and a(n) _____.