Question 1

The molluscan body plan includes three unique, shared, derived characteristics that support the monophyly of the group: the _______, the _______, and the _______.

Accepted Answer

A)  foot; radula; mantle 
B)  foot; mantle; shell 
C)  visceral mass; radula; mantle 
D)  visceral mass; mantle; shell 
E)  foot; visceral mass; mantle 
A)  foot; radula; mantle 
B)  foot; mantle; shell 
C)  visceral mass; radula; mantle 
D)  visceral mass; mantle; shell 
E)  foot; visceral mass; mantle

Question 2

Which of the following has not been a major feature of protostome evolution?

Accepted Answer

A)  Parasitism and complex life cycles 
B)  Segmentation of the body cavity 
C)  Improved mechanisms of locomotion, including muscles (versus cilia) for body movement 
D)  Evolution of mechanisms for ingesting large prey 
E)  Evolution of hard external body parts (exoskeletons) 
A)  Parasitism and complex life cycles 
B)  Segmentation of the body cavity 
C)  Improved mechanisms of locomotion, including muscles (versus cilia) for body movement 
D)  Evolution of mechanisms for ingesting large prey 
E)  Evolution of hard external body parts (exoskeletons)

Question 3

An arthropod group that is dominant in fresh water and on land but has few members in the oceans is the _______.

Accepted Answer

The answer of An arthropod group that is dominant in...

Question 4

Lobsters, millipedes, and butterflies share which of the following traits?

Accepted Answer

A)  Parapodia 
B)  Setae 
C)  Gas exchange across the skin 
D)  Jointed appendages 
E)  Spiracles 
A)  Parapodia 
B)  Setae 
C)  Gas exchange across the skin 
D)  Jointed appendages 
E)  Spiracles

Question 5

Some wormlike ecdysozoans have a relatively thin, flexible exoskeleton called a _______.

Accepted Answer

The answer of Some wormlike ecdysozoans have a relatively thin,...

Question 6

Which of the following about crustaceans is true?

Accepted Answer

A)  They are the least prevalent marine arthropods today. 
B)  Most have a body that is composed of three regions. 
C)  Most have six legs attached to the head. 
D)  They lack a carapace. 
E)  All of the above 
A)  They are the least prevalent marine arthropods today. 
B)  Most have a body that is composed of three regions. 
C)  Most have six legs attached to the head. 
D)  They lack a carapace. 
E)  All of the above

Question 7

Insects are different from other hexapods in that they possess

Accepted Answer

A)  a pair of antennae. 
B)  a motion-sensitive receptor called Johnston's organ. 
C)  a dorsal nerve cord. 
D)  six pairs of appendages. 
E)  an exoskeleton. 
A)  a pair of antennae. 
B)  a motion-sensitive receptor called Johnston's organ. 
C)  a dorsal nerve cord. 
D)  six pairs of appendages. 
E)  an exoskeleton.

Question 8

A caterpillar changing into a butterfly is an example of complete metamorphosis. During this process, a larva transforms itself into an adult during a specialized phase in which it is a _______.

Accepted Answer

The answer of A caterpillar changing into a butterfly is...

Question 9

Which of the following statements about bryozoans is false?

Accepted Answer

A)  They are colonial. 
B)  They are wormlike in structure. 
C)  They are mainly marine. 
D)  They have a lophophore. 
E)  Individual colony members may have specialized functions. 
A)  They are colonial. 
B)  They are wormlike in structure. 
C)  They are mainly marine. 
D)  They have a lophophore. 
E)  Individual colony members may have specialized functions.

Question 10

Factors that may have contributed to the remarkable evolutionary success of insects include

Accepted Answer

A)  the lack of any other similar organisms in the terrestrial environments colonized by insects. 
B)  the ability to fly. 
C)  complete metamorphosis. 
D)  a new mechanism for delivering oxygen to their internal tissues. 
E)  All of the above 
A)  the lack of any other similar organisms in the terrestrial environments colonized by insects. 
B)  the ability to fly. 
C)  complete metamorphosis. 
D)  a new mechanism for delivering oxygen to their internal tissues. 
E)  All of the above

Question 11

Which of the following groups includes animals with segmented coeloms?

Accepted Answer

A)  Bryozoans 
B)  Mollusks 
C)  Annelids 
D)  Flatworms 
E)  Nematodes 
A)  Bryozoans 
B)  Mollusks 
C)  Annelids 
D)  Flatworms 
E)  Nematodes

Question 12

The diversification of insects about 450 million years ago corresponds with

Accepted Answer

A)  the appearance of the first land plants. 
B)  the evolution of cartilaginous fish. 
C)  the extinction of dinosaurs. 
D)  changes in the CO2 concentration of the atmosphere. 
E)  None of the above 
A)  the appearance of the first land plants. 
B)  the evolution of cartilaginous fish. 
C)  the extinction of dinosaurs. 
D)  changes in the CO2 concentration of the atmosphere. 
E)  None of the above

Question 13

Which of the following groups of crustaceans bears a superficial resemblance to mollusks?

Accepted Answer

A)  Barnacles 
B)  Copepods 
C)  Isopods 
D)  Decapods 
E)  Water fleas 
A)  Barnacles 
B)  Copepods 
C)  Isopods 
D)  Decapods 
E)  Water fleas

Question 14

Which of the following attributes is not seen in the arthropod body plan?

Accepted Answer

A)  Segmentation 
B)  Jointed appendages 
C)  A closed circulatory system 
D)  A hard exoskeleton 
E)  Complete digestive tract 
A)  Segmentation 
B)  Jointed appendages 
C)  A closed circulatory system 
D)  A hard exoskeleton 
E)  Complete digestive tract

Question 15

The distinguishing feature of ecdysozoans is the _______, a nonliving covering that provides the animal with protection and support.

Accepted Answer

The answer of The distinguishing feature of ecdysozoans is the...

Question 16

Which of the following taxa does not contain wormlike organisms?

Accepted Answer

A)  Nematodes 
B)  Clitellates 
C)  Annelids 
D)  Polychaetes 
E)  Bryozoans 
A)  Nematodes 
B)  Clitellates 
C)  Annelids 
D)  Polychaetes 
E)  Bryozoans

Question 17

Brachiopods reached their peak abundance and diversity during the

Accepted Answer

A)  Paleozoic. 
B)  Mesozoic. 
C)  Cenozoic. 
D)  Precambrian. 
E)  Both a and b 
A)  Paleozoic. 
B)  Mesozoic. 
C)  Cenozoic. 
D)  Precambrian. 
E)  Both a and b

Question 18

Arrow worms

Accepted Answer

A)  were once thought to be deuterostomes based on their development. 
B)  have a circulatory system. 
C)  are definitely the closest relatives of the lophotrochozoans. 
D)  have two sexes. 
E)  have a distinct larval stage. 
A)  were once thought to be deuterostomes based on their development. 
B)  have a circulatory system. 
C)  are definitely the closest relatives of the lophotrochozoans. 
D)  have two sexes. 
E)  have a distinct larval stage.

Question 19

Which of the following is not one of the major recognized groups of winged insects?

Accepted Answer

A)  Insects that cannot fold their wings back against the body 
B)  Insects that can fold their wings and undergo incomplete metamorphosis 
C)  Insects that do not undergo metamorphosis 
D)  Insects that can fold their wings and undergo complete metamorphosis 
E)  All of the above are major recognized groups. 
A)  Insects that cannot fold their wings back against the body 
B)  Insects that can fold their wings and undergo incomplete metamorphosis 
C)  Insects that do not undergo metamorphosis 
D)  Insects that can fold their wings and undergo complete metamorphosis 
E)  All of the above are major recognized groups.

Question 20

Of the groups listed below, which is a descendant of the most recent common ancestor of lophotrochozoans?

Accepted Answer

A)  Sponges 
B)  Vertebrates 
C)  Mollusks 
D)  Insects 
E)  Cnidarians 
A)  Sponges 
B)  Vertebrates 
C)  Mollusks 
D)  Insects 
E)  Cnidarians

Exam 32: Protostome Animals

The molluscan body plan includes three unique, shared, derived characteristics that support the monophyly of the group: the _______, the _______, and the _______.

Which of the following has not been a major feature of protostome evolution?

An arthropod group that is dominant in fresh water and on land but has few members in the oceans is the _______.

Lobsters, millipedes, and butterflies share which of the following traits?

Some wormlike ecdysozoans have a relatively thin, flexible exoskeleton called a _______.

Which of the following about crustaceans is true?

Insects are different from other hexapods in that they possess

A caterpillar changing into a butterfly is an example of complete metamorphosis. During this process, a larva transforms itself into an adult during a specialized phase in which it is a _______.

Which of the following statements about bryozoans is false?

Factors that may have contributed to the remarkable evolutionary success of insects include

Which of the following groups includes animals with segmented coeloms?

The diversification of insects about 450 million years ago corresponds with

Which of the following groups of crustaceans bears a superficial resemblance to mollusks?

Which of the following attributes is not seen in the arthropod body plan?

The distinguishing feature of ecdysozoans is the _______, a nonliving covering that provides the animal with protection and support.

Which of the following taxa does not contain wormlike organisms?

Brachiopods reached their peak abundance and diversity during the

Arrow worms

Which of the following is not one of the major recognized groups of winged insects?

Of the groups listed below, which is a descendant of the most recent common ancestor of lophotrochozoans?

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The molluscan body plan includes three unique, shared, derived characteristics that support the monophyly of the group: the ___, the _, and the _____.