Question 1

Sea stars and sea urchins operate their tube feet by

Accepted Answer

A)  a hydraulic system that regulates water pressure. 
B)  cilia transporting hemolymph from chamber to chamber. 
C)  sticky threads leading from the mouth. 
D)  actin and myosin fibers that slide and give muscle actions to the five arms or "rays." 
E)  an extensive net of nerve and muscle cells. 
A)  a hydraulic system that regulates water pressure. 
B)  cilia transporting hemolymph from chamber to chamber. 
C)  sticky threads leading from the mouth. 
D)  actin and myosin fibers that slide and give muscle actions to the five arms or "rays." 
E)  an extensive net of nerve and muscle cells.

Question 2

Lophotrochozoa are animals that are organized circularly, so no matter how they are sliced in half longitudinally, mirror images are obtained.

Accepted Answer

A) True 
 B)False

Question 3

Which of the following organisms has a true coelom?

Accepted Answer

A)  sponges 
B)  hydras 
C)  flatworms 
D)  roundworms 
E)  earthworms 
A)  sponges 
B)  hydras 
C)  flatworms 
D)  roundworms 
E)  earthworms

Question 4

The cephalopods resemble other molluscs because they have

Accepted Answer

A)  complex eyes. 
B)  a siphon for jet propulsion. 
C)  a parrot-like beak for tearing prey. 
D)  well-developed brains with high learning capacity. 
E)  most of the internal organs located in a visceral mass. 
A)  complex eyes. 
B)  a siphon for jet propulsion. 
C)  a parrot-like beak for tearing prey. 
D)  well-developed brains with high learning capacity. 
E)  most of the internal organs located in a visceral mass.

Question 5

Which pair exhibits the closest phylogenetic relationship?

Accepted Answer

A)  spider-tick 
B)  housefly-mite 
C)  earthworm-grasshopper 
D)  crayfish-planarian 
E)  scorpion-clam 
A)  spider-tick 
B)  housefly-mite 
C)  earthworm-grasshopper 
D)  crayfish-planarian 
E)  scorpion-clam

Question 6

The following statements may apply only cnidarians, only to lophotrochozoans, or to both. Which of the following statements applies only to lophotrochozoans?

Accepted Answer

A)  Organisms go through both bilateral and radial stages of development. 
B)  Most are found in shallow coastal marine environments. 
C)  There are two tissue layers: an outer epidermis and inner gastrodermis. 
D)  Stinging cells contain a threadlike nematocyst released to capture prey. 
E)  A jellylike mesoglea contains cells that form a nerve net throughout the body. 
A)  Organisms go through both bilateral and radial stages of development. 
B)  Most are found in shallow coastal marine environments. 
C)  There are two tissue layers: an outer epidermis and inner gastrodermis. 
D)  Stinging cells contain a threadlike nematocyst released to capture prey. 
E)  A jellylike mesoglea contains cells that form a nerve net throughout the body.

Question 7

The nervous system of a sea star includes

Accepted Answer

A)  no actual nerve cells. 
B)  a complex of nerve ganglia in each ray. 
C)  a central nervous system, including a brain. 
D)  a central nerve ring that gives off radial nerves in each arm. 
E)  a dorsal hollow nerve cord. 
A)  no actual nerve cells. 
B)  a complex of nerve ganglia in each ray. 
C)  a central nervous system, including a brain. 
D)  a central nerve ring that gives off radial nerves in each arm. 
E)  a dorsal hollow nerve cord.

Question 8

Planaria feed by

Accepted Answer

A)  attaching to a food item with a sucker and extracting fluids. 
B)  tearing and sucking food particles via a muscular pharynx. 
C)  externally digesting food items and then ingesting the liquified food. 
D)  diffusing in nutrients from the environment through its thin epidermal surface. 
E)  filtering the water. 
A)  attaching to a food item with a sucker and extracting fluids. 
B)  tearing and sucking food particles via a muscular pharynx. 
C)  externally digesting food items and then ingesting the liquified food. 
D)  diffusing in nutrients from the environment through its thin epidermal surface. 
E)  filtering the water.

Question 9

Which statement(s) about cnidarians is/are true?

Accepted Answer

A)  Reproduction is both sexual and asexual. 
B)  Some forms are sessile and others are motile. 
C)  They live in either marine or freshwater environments. 
D)  They have specialized stinging cells that contain a toxin-filled capsule. 
E)  All of the answer choices describe characteristics of cnidarians. 
A)  Reproduction is both sexual and asexual. 
B)  Some forms are sessile and others are motile. 
C)  They live in either marine or freshwater environments. 
D)  They have specialized stinging cells that contain a toxin-filled capsule. 
E)  All of the answer choices describe characteristics of cnidarians.

Question 10

Which statement is true about invertebrate animals?

Accepted Answer

A)  The vast majority of animal species are invertebrates. 
B)  Many invertebrate species live in a marine environment. 
C)  Most animal phyla are invertebrates. 
D)  All major invertebrate groups arose from protistan ancestors. 
E)  All of the answer choices are true statements about invertebrates. 
A)  The vast majority of animal species are invertebrates. 
B)  Many invertebrate species live in a marine environment. 
C)  Most animal phyla are invertebrates. 
D)  All major invertebrate groups arose from protistan ancestors. 
E)  All of the answer choices are true statements about invertebrates.

Question 11

A floating Portuguese man-of-war is

Accepted Answer

A)  a cubozoan. 
B)  merely an inflated, noncircular jellyfish. 
C)  a free-swimming polyp in the hydra group. 
D)  the first animal with all major organ systems. 
E)  a colony of polyps. 
A)  a cubozoan. 
B)  merely an inflated, noncircular jellyfish. 
C)  a free-swimming polyp in the hydra group. 
D)  the first animal with all major organ systems. 
E)  a colony of polyps.

Question 12

A tapeworm infection could result from

Accepted Answer

A)  eating insufficiently cooked pork. 
B)  being bitten by a mosquito. 
C)  ingesting eggs in contaminated water. 
D)  eating freshly peeled fruit. 
E)  wading in contaminated water. 
A)  eating insufficiently cooked pork. 
B)  being bitten by a mosquito. 
C)  ingesting eggs in contaminated water. 
D)  eating freshly peeled fruit. 
E)  wading in contaminated water.

Question 13

The life cycle of animals

Accepted Answer

A)  demonstrates alternation of generations, where the zygote is haploid and the adult is diploid. 
B)  does not demonstrate alternation of generations. Both the zygote and the adult are haploid. 
C)  demonstrates alternation of generations, where the zygote is diploid and the adult is haploid. 
D)  does not demonstrate alternation of generations because only the spores are haploid. 
E)  does not demonstrate alternation of generations; gametes are haploid and the organism is diploid. 
A)  demonstrates alternation of generations, where the zygote is haploid and the adult is diploid. 
B)  does not demonstrate alternation of generations. Both the zygote and the adult are haploid. 
C)  demonstrates alternation of generations, where the zygote is diploid and the adult is haploid. 
D)  does not demonstrate alternation of generations because only the spores are haploid. 
E)  does not demonstrate alternation of generations; gametes are haploid and the organism is diploid.

Question 14

Which of the following is a characteristic of earthworms?

Accepted Answer

A)  segmentation 
B)  expanded dorsal surface of the intestine called a typhlosole 
C)  hermaphroditic 
D)  paired nephridia in each segment 
E)  All of the answer choices are characteristics of earthworms. 
A)  segmentation 
B)  expanded dorsal surface of the intestine called a typhlosole 
C)  hermaphroditic 
D)  paired nephridia in each segment 
E)  All of the answer choices are characteristics of earthworms.

Question 15

The two layers of tissue in a hydra are

Accepted Answer

A)  the epidermis, which covers and protects, and the inner layer that contains flame cells. 
B)  the epidermis that covers and protects, and the gastrodermis where cells that complete digestion are found. 
C)  the epidermis that contains flame cells, and the gastrodermis that contains the nephridia. 
D)  the epidermis that covers and protects, and the gastrodermis that contains the nephridia. 
E)  the epidermis that covers and protects, and the gastrodermis that contains a ladder-like nervous system. 
A)  the epidermis, which covers and protects, and the inner layer that contains flame cells. 
B)  the epidermis that covers and protects, and the gastrodermis where cells that complete digestion are found. 
C)  the epidermis that contains flame cells, and the gastrodermis that contains the nephridia. 
D)  the epidermis that covers and protects, and the gastrodermis that contains the nephridia. 
E)  the epidermis that covers and protects, and the gastrodermis that contains a ladder-like nervous system.

Question 16

Which of the following organisms exhibit complete metamorphosis?

Accepted Answer

A)  crayfish 
B)  starfish 
C)  grasshoppers 
D)  butterfly 
E)  lobsters 
A)  crayfish 
B)  starfish 
C)  grasshoppers 
D)  butterfly 
E)  lobsters

Question 17

Nematocysts are characteristic of

Accepted Answer

A)  sponges. 
B)  clams. 
C)  cnidarians. 
D)  flatworms. 
E)  roundworms. 
A)  sponges. 
B)  clams. 
C)  cnidarians. 
D)  flatworms. 
E)  roundworms.

Question 18

Sponges exhibit radial symmetry.

Accepted Answer

A) True 
 B)False

Question 19

A major characteristic of the arthropods is the presence of

Accepted Answer

A)  flame cells. 
B)  radial symmetry. 
C)  a soft exoskeleton. 
D)  a closed circulatory system. 
E)  jointed appendages. 
A)  flame cells. 
B)  radial symmetry. 
C)  a soft exoskeleton. 
D)  a closed circulatory system. 
E)  jointed appendages.

Question 20

Sea stars reproduce

Accepted Answer

A)  by budding. 
B)  by binary fission. 
C)  asexually by fragmentation. 
D)  by sexual processes only. 
E)  by sexual means and also by asexual fragmentation. 
A)  by budding. 
B)  by binary fission. 
C)  asexually by fragmentation. 
D)  by sexual processes only. 
E)  by sexual means and also by asexual fragmentation.

Exam 31: Animals: the Invertebrates

Sea stars and sea urchins operate their tube feet by

Lophotrochozoa are animals that are organized circularly, so no matter how they are sliced in half longitudinally, mirror images are obtained.

Which of the following organisms has a true coelom?

The cephalopods resemble other molluscs because they have

Which pair exhibits the closest phylogenetic relationship?

The following statements may apply only cnidarians, only to lophotrochozoans, or to both. Which of the following statements applies only to lophotrochozoans?

The nervous system of a sea star includes

Planaria feed by

Which statement(s) about cnidarians is/are true?

Which statement is true about invertebrate animals?

A floating Portuguese man-of-war is

A tapeworm infection could result from

The life cycle of animals

Which of the following is a characteristic of earthworms?

The two layers of tissue in a hydra are

Which of the following organisms exhibit complete metamorphosis?

Nematocysts are characteristic of

Sponges exhibit radial symmetry.

A major characteristic of the arthropods is the presence of

Sea stars reproduce

The Study of Life

The Molecules of Cells

Cell Structure and Function

Membrane Structure and Function

Cell Division

Metabolism: Energy and Enzymes

Cellular Respiration

Photosynthesis

Plant Organization and Function

Plant Reproduction and Responses

Human Organization

Cardiovascular System

Lymphatic and Immune Systems

Digestive System and Nutrition

Respiratory System

Urinary System and Excretion

Nervous System

Senses

Musculoskeletal System

Endocrine System

Reproductive System

Development and Aging

Patterns of Gene Inheritance

Chromosomal Basis of Inheritance

Dna Structure and Gene Expression

Biotechnology and Genomics

Evolution of Life

Microbiology

Protists and Fungi

Plants

Animals: Chordates and Vertebrates

Behavioral Ecology

Population and Community Ecology

Nature of Ecosystems

Major Ecosystems of the Biosphere

Conservation Biology

Filters