Question 1

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.F) B) and D)
G) A) and D)

Question 2

Nematocysts are characteristic of

Accepted Answer

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

Question 3

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.F) None of the above
G) D) and E)

Question 4

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.F) C) and D)
G) A) and E)

Question 5

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.F) B) and D)
G) B) and C)

Question 6

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.F) D) and E)
G) All of the above

Question 7

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.F) A) and E)
G) B) and E)

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.F) B) and D)
G) A) and E)

Question 9

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.F) A) and C)
G) A) and D)

Question 10

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.F) C) and D)
G) D) and E)

Question 11

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 12

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.F) A) and E)
G) A) and D)

Question 13

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.F) A) and E)
G) C) and D)

Question 14

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.F) A) and B)
G) A) and C)

Question 15

Which pair exhibits the closest phylogenetic relationship?

Accepted Answer

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

Question 16

Which of the following organisms exhibit complete metamorphosis?

Accepted Answer

A)   crayfish
B)   starfish
C)   grasshoppers
D)   butterfly
E)   lobstersF) B) and E)
G) A) and B)

Question 17

Sponges exhibit radial symmetry.

Accepted Answer

A) True 
 B)False

Question 18

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.F) A) and E)
G) C) and E)

Question 19

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.F) A) and C)
G) A) and B)

Question 20

Which of the following organisms has a true coelom?

Accepted Answer

A)   sponges
B)   hydras
C)   flatworms
D)   roundworms
E)   earthwormsF) None of the above
G) C) and D)

Exam 31: Animals: the Invertebrates

The nervous system of a sea star includes

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Sea stars reproduce

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Which pair exhibits the closest phylogenetic relationship?

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Sea stars and sea urchins operate their tube feet by

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Which of the following organisms has a true coelom?

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A major characteristic of the arthropods is the presence of

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A floating Portuguese man-of-war is

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A tapeworm infection could result from

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The two layers of tissue in a hydra are

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The life cycle of animals

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Which statement is true about invertebrate animals?

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Planaria feed by

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Which of the following is a characteristic of earthworms?

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Nematocysts are characteristic of

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

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Which of the following organisms exhibit complete metamorphosis?

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

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

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Sponges exhibit radial symmetry.

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The cephalopods resemble other molluscs because they have

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