Question 1

Flatworms have complete digestive tracts.

Accepted Answer

A) True 
 B)False

Question 2

Caenorhabditis elegans is a nematode that scientists have shown grows from a single cell into 1000 cells,of which the same 80 die through apoptosis.Studying this process in Caenorhabditis elegans has helped scientists identify the genes that regulate similar processes in humans.Caenorhabditis elegans goes through direct development.

Accepted Answer

A) True 
 B)False

Question 3

Which of the following is a trait shared by mammals and reptiles that are not shared by the other groups of chordates?

Accepted Answer

A)  Hair
B)  Mammary glands
C)  An amnion
D)  Legs
E)  LungsF) All of the above
G) A) and E)

Question 4

In most species,the female frog lays her eggs directly in the water as a male clasps her back and releases sperm.The fertilized eggs hatch into legless,aquatic tadpoles.Most tadpoles feed on algae,and have gills.As they mature,tadpoles develop legs and lungs,lose the tail,and acquire carnivorous tastes.Frogs have which of the following traits?

Accepted Answer

A)  Endothermic
B)  Tetrapod
C)  Incomplete digestive tract
D)  Cartilagenous skeleton
E)  JawlessF) C) and D)
G) B) and D)

Question 5

Which of the following is not a characteristic of a nematode?

Accepted Answer

A)  They have a complete digestive tract
B)  They are unsegmented
C)  They have bilateral symmetry
D)  They have a coelom
E)  They exhibit cephalizationF) None of the above
G) B) and D)

Question 6

Some animals are autotrophs.

Accepted Answer

A) True 
 B)False

Question 7

figure 20.58 
-In the phylogenetic tree shown in figure 20.58,what can you conclude about the origin of marine (sea) snakes?

Accepted Answer

A)  The marine snakes were the ancestor to all modern snakes
B)  The marine snakes evolved independently from terrestrial snakes
C)  The marine snakes arose later in snake evolution
D)  Marine snakes probably had functional hindlimbs more recently than did terrestrial snakes
E)  Marine snakes are more closely related to amphibians than to other reptilesF) B) and C)
G) A) and E)

Question 8

The tendency to concentrate sensory organs and brain at the head end of an animal is called cephalization.

Accepted Answer

A) True 
 B)False

Question 9

The most obvious characteristic of annelids is the repeated segments that make up their bodies.They also have a complete digestive system,and a coelom.Which of the following is true of an annelid?

Accepted Answer

A)  Their gut is separated from their body wall and they have cephalization
B)  Their gut is separated from their body wall
C)  They have cephalization
D)  They have an open circulatory system
E)  They have an open circulatory system and cephalizationF) B) and D)
G) C) and E)

Question 10

figure 20.58 
-If snakes did evolve from burrowing lizards,which of the following is the most likely explanation for the selective advantage of snakes losing their hindlimbs?

Accepted Answer

A)  They could pursue small prey down holes better without hind limbs
B)  They would be able to move faster without hindlimbs
C)  They could grasp prey better without hindlimbs
D)  They could swim better without hindlimbs
E)  They could dig tunnels faster without hindlimbsF) A) and B)
G) None of the above

Question 11

Which of the following is a cartilaginous fish?

Accepted Answer

A)  Sharks
B)  Tuna
C)  Salmon
D)  Lungfish
E)  CatfishF) B) and D)
G) A) and B)

Question 12

Pinworms and hookworms belong to the phylum:

Accepted Answer

A)  Nematoda
B)  Annelida
C)  Platyhelminthes
D)  Porifera
E)  CnidariaF) A) and D)
G) B) and C)

Question 13

A circulatory system in which the heart pumps blood to tissues throughout the body cavity is referred to as:

Accepted Answer

A)  A closed circulatory system
B)  A gastrovascular cavity
C)  An incomplete circulatory system
D)  A complete circulatory system
E)  An open circulatory systemF) A) and E)
G) B) and C)

Question 14

The octopus and squid are cephalopods and are members of which group?

Accepted Answer

A)  Echinoderms
B)  Arthropods
C)  Amphibians
D)  Cnidarians
E)  MolluscsF) B) and D)
G) A) and D)

Question 15

A circulatory system that keeps blood confined within vessels after leaving the heart is referred to as:

Accepted Answer

A)  A closed circulatory system
B)  A gastrovascular cavity
C)  An open circulatory system
D)  An incomplete circulatory system
E)  A complete circulatory systemF) D) and E)
G) A) and D)

Question 16

Which of the following is a characteristic of the phylum Chordata?

Accepted Answer

A)  They do not have true tissues
B)  They have a gastrula with only two germ layers
C)  They have radial symmetry
D)  They have a notochord
E)  They have a pseudocoelomF) A) and D)
G) A) and E)

Question 17

Cnidarians all share the ability to do which of the following?

Accepted Answer

A)  Photosynthesize
B)  Secrete enzymes to digest food
C)  Sting predators and prey
D)  Live on land
E)  FlyF) A) and E)
G) C) and D)

Question 18

Which of the following is not a characteristic of the echinoderms?

Accepted Answer

A)  They exhibit cephalization
B)  Radial symmetry in adults
C)  Bilateral symmetry in larvae
D)  They have a complete digestive tract
E)  They have spiny skinF) B) and E)
G) C) and E)

Question 19

The free-swimming tunicate larva resembles a tadpole.Once it settles headfirst onto a solid surface the tail and notochord disappear,and the nerve cord shrinks to nearly nothing.The adults,which are usually sessile,retain only the pharyngeal slits.Neither adult nor larva is segmented.Tunicates have which of the following traits?

Accepted Answer

A)  Radial symmetry
B)  Asymmetry
C)  Cephalization
D)  Endothermic
E)  Incomplete digestive tractF) A) and B)
G) A) and C)

Question 20

The embryonic germ layer of tissue in animals that develops into the skin and nervous system is the:

Accepted Answer

A)  Pachyderm
B)  Endoderm
C)  Mesoderm
D)  Protoderm
E)  EctodermF) None of the above
G) A) and B)

Exam 20: Animals

Which of the following is a characteristic of the phylum Chordata?

Correct Answer
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Correct Answer
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The tendency to concentrate sensory organs and brain at the head end of an animal is called cephalization.

Correct Answer
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Correct Answer
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A circulatory system that keeps blood confined within vessels after leaving the heart is referred to as:

Correct Answer
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Which of the following is not a characteristic of the echinoderms?

Correct Answer
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Pinworms and hookworms belong to the phylum:

Correct Answer
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Which of the following is not a characteristic of a nematode?

Correct Answer
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Correct Answer
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The embryonic germ layer of tissue in animals that develops into the skin and nervous system is the:

Correct Answer
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figure 20.58 -In the phylogenetic tree shown in figure 20.58,what can you conclude about the origin of marine (sea) snakes?

Correct Answer
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Which of the following is a trait shared by mammals and reptiles that are not shared by the other groups of chordates?

Correct Answer
verified

Some animals are autotrophs.

Correct Answer
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Flatworms have complete digestive tracts.

Correct Answer
verified

A circulatory system in which the heart pumps blood to tissues throughout the body cavity is referred to as:

Correct Answer
verified

Cnidarians all share the ability to do which of the following?

Correct Answer
verified

The most obvious characteristic of annelids is the repeated segments that make up their bodies.They also have a complete digestive system,and a coelom.Which of the following is true of an annelid?

Correct Answer
verified

The octopus and squid are cephalopods and are members of which group?

Correct Answer
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Which of the following is a cartilaginous fish?

Correct Answer
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figure 20.58 -If snakes did evolve from burrowing lizards,which of the following is the most likely explanation for the selective advantage of snakes losing their hindlimbs?

Correct Answer
verified

Exam 20: Animals

Which of the following is a characteristic of the phylum Chordata?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

The tendency to concentrate sensory organs and brain at the head end of an animal is called cephalization.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

A circulatory system that keeps blood confined within vessels after leaving the heart is referred to as:

Correct AnswerverifiedShow Answer

Which of the following is not a characteristic of the echinoderms?

Correct AnswerverifiedShow Answer

Pinworms and hookworms belong to the phylum:

Correct AnswerverifiedShow Answer

Which of the following is not a characteristic of a nematode?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

The embryonic germ layer of tissue in animals that develops into the skin and nervous system is the:

Correct AnswerverifiedShow Answer

figure 20.58 -In the phylogenetic tree shown in figure 20.58,what can you conclude about the origin of marine (sea) snakes?

Correct AnswerverifiedShow Answer

Which of the following is a trait shared by mammals and reptiles that are not shared by the other groups of chordates?

Correct AnswerverifiedShow Answer

Some animals are autotrophs.

Correct AnswerverifiedShow Answer

Flatworms have complete digestive tracts.

Correct AnswerverifiedShow Answer

A circulatory system in which the heart pumps blood to tissues throughout the body cavity is referred to as:

Correct AnswerverifiedShow Answer

Cnidarians all share the ability to do which of the following?

Correct AnswerverifiedShow Answer

The most obvious characteristic of annelids is the repeated segments that make up their bodies.They also have a complete digestive system,and a coelom.Which of the following is true of an annelid?

Correct AnswerverifiedShow Answer

The octopus and squid are cephalopods and are members of which group?

Correct AnswerverifiedShow Answer

Which of the following is a cartilaginous fish?

Correct AnswerverifiedShow Answer

figure 20.58 -If snakes did evolve from burrowing lizards,which of the following is the most likely explanation for the selective advantage of snakes losing their hindlimbs?

Correct AnswerverifiedShow Answer

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