Question 1

The bony or cartilaginous cranium in chordates is adaptive because it

Accepted Answer

A)   protects the brain.
B)   develops into the postanal tail.
C)   allows movement, as a lightweight exoskeleton structure.
D)   replaces the notochord in most chordates.
E)   forms the vertebrae.F) D) and E)
G) A) and B)

Question 2

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

Accepted Answer

A)   mollusks
B)   cnidarians
C)   amphibians
D)   arthropods
E)   echinodermsF) C) and D)
G) A) and B)

Question 3

Figuer: 
-The forelimbs of Tiktaalik have bones,but are fringed with fins instead of toes (see figure) .Which of the following is the best explanation for this observation?

Accepted Answer

A)   This is a common ancestor to all of the modern amphibian species that have fins on their forelimb.
B)   This is a transitional fossil, and the species has not yet lost its fins.
C)   This species was an evolutionary dead end, which is why no modern species have both bones and fins on their forelimbs.
D)   This is a common ancestor to all of the modern fish species that have bones in their forelimbs.
E)   This is a transitional fossil, and the species has not yet lost its arm bones.F) C) and D)
G) A) and D)

Question 4

Amphioxus is an example of a

Accepted Answer

A)   hagfish.
B)   amphibian.
C)   tunicate.
D)   lancelet.
E)   reptile.F) C) and D)
G) A) and D)

Question 5

In a biology lab dissection,you find that an organism,called a lancelet,has a flexible rod of nerve cells,extending along its back to its tail.It is a member of the phylum

Accepted Answer

A)   Echinoderms.
B)   Arthropods.
C)   Nematodes.
D)   Chordates.
E)   Cnidarians.F) C) and E)
G) A) and C)

Question 6

Which of the following are characteristics of reptiles?

Accepted Answer

A)   They have lungs.
B)   They have lungs and a skeleton composed of cartilage.
C)   They have a skeleton composed of cartilage.
D)   They have lungs and are ectotherms.
E)   They are ectotherms.F) A) and B)
G) A) and C)

Question 7

Figuer:
Main animal groups are noted at the right. Names diverging at each node are morphological or body form names. Note that the animal traits key to distinguishing the groups and body forms are not shown. 
-The distinguishing animal trait "A," that separates the body forms of the Eumetazoa and the Parazoa is

Accepted Answer

A)   whether it is the mouth or the anus which forms first from the opening in the developing embryo.
B)   whether or not the animal has true tissues.
C)   whether the animal must periodically molt in order to grow, or has characteristic soft larval stages.
D)   whether the animal has bilateral symmetry and three germ layers, or radial symmetry and two germ layers.
E)   None of these answer options is correct.F) C) and E)
G) B) and C)

Question 8

The most successful phylum in regards to diversity and numbers is

Accepted Answer

A)   Platyhelminthes.
B)   Mollusca.
C)   Echinodermata.
D)   Arthropoda.
E)   Nematoda.F) A) and D)
G) A) and E)

Question 9

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.
-The primary function of external gills in aquatic animals is to

Accepted Answer

A)   transport blood.
B)   secrete reproductive hormones.
C)   relay nerve impulses.
D)   exchange gases with the water.
E)   defend against invading microorganisms.F) B) and C)
G) C) and E)

Question 10

Centipedes,earthworms,and roundworms all illustrate segmentation.

Accepted Answer

A) True 
 B)False

Question 11

Figuer:
Main animal groups are noted at the right. Names diverging at each node are morphological or body form names. Note that the animal traits key to distinguishing the groups and body forms are not shown.

-The proposed common ancestor to all animals,shown at the left of the evolutionary tree,was a

Accepted Answer

A)   plant.
B)   protist.
C)   bacterium.
D)   fungus.
E)   None of these answer options is correct. A simplified animal was the proposed common ancestor.F) B) and E)
G) D) and E)

Question 12

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 13

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)   cartilaginous skeleton
B)   larval respiration with gills, but adult respiration with lungs
C)   jawless
D)   incomplete digestive tract
E)   endothermicF) None of the above
G) C) and D)

Question 14

A surviving member of the lobe-finned fishes is the

Accepted Answer

A)   ray.
B)   lamprey.
C)   lungfish.
D)   ostracoderm.
E)   eel.F) All of the above
G) B) and D)

Question 15

Some animals are autotrophs.

Accepted Answer

A) True 
 B)False

Question 16

All of these animals are mollusks except

Accepted Answer

A)   chitons.
B)   terrestrial snails and slugs.
C)   squids and octopuses.
D)   All of these animals have the soft body form of the mollusks.
E)   flatworms.F) A) and E)
G) All of the above

Question 17

Flukes and tapeworms belong to the phylum containing the

Accepted Answer

A)   Sponges.
B)   Nematodes.
C)   Cnidarians.
D)   Annelids.
E)   Flatworms.F) A) and D)
G) C) and E)

Question 18

Which of the following are characteristics of hagfishes?

Accepted Answer

A)   They have a cranium.
B)   They have a notocord composed of cartilage.
C)   They have vertebrae.
D)   They have a cranium and vertebrae.
E)   They have a cranium and a notocord composed of cartilage.F) D) and E)
G) None of the above

Question 19

Which of the following is not a characteristic of mammals?

Accepted Answer

A)   They are endothermic.
B)   They have a skeletal system composed of bone.
C)   They have a two-chambered heart.
D)   They have an amnion.
E)   They have lungs.F) A) and B)
G) D) and E)

Question 20

An accurate contrast between radial and bilateral symmetry among animals is that

Accepted Answer

A)   mirrored arrangement of body components is common with radial symmetry, but not found at all in bilateral symmetry.
B)   body components are arranged around a central axis in radial symmetry, but are arranged with a distinct left and right in bilateral symmetry.
C)   radial symmetry only occurs in round organisms like the sponges, while bilateral symmetry is common to all of the more complex animals.
D)   animals with radial symmetry demonstrate cephalization, while those with bilateral symmetry do not.
E)   radial symmetry is characterized by the animal having a coelom, while bilateral symmetry has no coelom in the animal body.F) C) and D)
G) B) and E)

Exam 21: Animals

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

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

Correct Answer
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Which of the following are characteristics of hagfishes?

Correct Answer
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Some animals are autotrophs.

Correct Answer
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Correct Answer
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In a biology lab dissection,you find that an organism,called a lancelet,has a flexible rod of nerve cells,extending along its back to its tail.It is a member of the phylum

Correct Answer
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The most successful phylum in regards to diversity and numbers is

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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Which of the following are characteristics of reptiles?

Correct Answer
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Centipedes,earthworms,and roundworms all illustrate segmentation.

Correct Answer
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Correct Answer
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Amphioxus is an example of a

Correct Answer
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All of these animals are mollusks except

Correct Answer
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A surviving member of the lobe-finned fishes is the

Correct Answer
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Figuer: -The forelimbs of Tiktaalik have bones,but are fringed with fins instead of toes (see figure) .Which of the following is the best explanation for this observation?

Correct Answer
verified

The bony or cartilaginous cranium in chordates is adaptive because it

Correct Answer
verified

Flukes and tapeworms belong to the phylum containing the

Correct Answer
verified

An accurate contrast between radial and bilateral symmetry among animals is that

Correct Answer
verified

Exam 21: Animals

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

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which of the following is not a characteristic of mammals?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which of the following are characteristics of hagfishes?

Correct AnswerverifiedShow Answer

Some animals are autotrophs.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

In a biology lab dissection,you find that an organism,called a lancelet,has a flexible rod of nerve cells,extending along its back to its tail.It is a member of the phylum

Correct AnswerverifiedShow Answer

The most successful phylum in regards to diversity and numbers is

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following are characteristics of reptiles?

Correct AnswerverifiedShow Answer

Centipedes,earthworms,and roundworms all illustrate segmentation.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Amphioxus is an example of a

Correct AnswerverifiedShow Answer

All of these animals are mollusks except

Correct AnswerverifiedShow Answer

A surviving member of the lobe-finned fishes is the

Correct AnswerverifiedShow Answer

Figuer: -The forelimbs of Tiktaalik have bones,but are fringed with fins instead of toes (see figure) .Which of the following is the best explanation for this observation?

Correct AnswerverifiedShow Answer

The bony or cartilaginous cranium in chordates is adaptive because it

Correct AnswerverifiedShow Answer

Flukes and tapeworms belong to the phylum containing the

Correct AnswerverifiedShow Answer

An accurate contrast between radial and bilateral symmetry among animals is that

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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Correct Answer
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