Question 1

Which one of the following statements about the phylum Brachiopoda is false?

Accepted Answer

A) Brachiopods are often misidentified as bivalves. 
B) Brachiopods were much more diverse in the past. 
C) As in bivalves,the valves in brachiopods are lateral (left and right)to the body axis. 
D) Most brachiopods are sessile (attached). 
E) The lophophore resides within the brachiopod's shells. 
A) Brachiopods are often misidentified as bivalves. 
B) Brachiopods were much more diverse in the past. 
C) As in bivalves,the valves in brachiopods are lateral (left and right)to the body axis. 
D) Most brachiopods are sessile (attached). 
E) The lophophore resides within the brachiopod's shells.

Question 2

The cephalopod mollusks have

Accepted Answer

A) a muscular foot. 
B) tentacles. 
C) two siphons. 
D) setae. 
E) jointed appendages. 
A) a muscular foot. 
B) tentacles. 
C) two siphons. 
D) setae. 
E) jointed appendages.

Question 3

Why doesn't a tapeworm have a mouth on its scolex?

Accepted Answer

A) The mouth is on the proglottids. 
B) Endoparasites don't need a mouth. 
C) The mouth is located at the end of the pharynx. 
D) Tapeworms use a radula instead of a mouth to feed. 
A) The mouth is on the proglottids. 
B) Endoparasites don't need a mouth. 
C) The mouth is located at the end of the pharynx. 
D) Tapeworms use a radula instead of a mouth to feed.

Question 4

Air passage into the trachea of most insects is controlled by the closing and opening of valves,which operate special openings called

Accepted Answer

A) spiracles. 
B) ocelli. 
C) ommatidia. 
D) book lungs. 
E) Malpighian tubules. 
A) spiracles. 
B) ocelli. 
C) ommatidia. 
D) book lungs. 
E) Malpighian tubules.

Question 5

Which one of the following incorrectly matches a molluscan group with a feature characterizing that group?

Accepted Answer

A) Gastropoda-torsion 
B) Nudibranchs-extensive gills in mantle cavity 
C) Bivalvia-reduced head and no radula 
D) Polyplacophora-eight calcareous plates 
E) Cephalopoda-closed circulatory system 
A) Gastropoda-torsion 
B) Nudibranchs-extensive gills in mantle cavity 
C) Bivalvia-reduced head and no radula 
D) Polyplacophora-eight calcareous plates 
E) Cephalopoda-closed circulatory system

Question 6

The evolution of jointed appendages has made ________ very successful.

Accepted Answer

Arthropods

Question 7

Paramecia use cilia for locomotion and for gathering organic matter.How are rotifers similar?

Accepted Answer

A) Rotifers are single-celled protists. 
B) The corona is made of cilia,and used for swimming and feeding. 
C) Rotifers and ciliates are thought to have given rise to all other animal phyla. 
D) Both lack a gut. 
A) Rotifers are single-celled protists. 
B) The corona is made of cilia,and used for swimming and feeding. 
C) Rotifers and ciliates are thought to have given rise to all other animal phyla. 
D) Both lack a gut.

Question 8

Which one of the following insect organ systems has placed the greatest limitation on their body size?

Accepted Answer

A) nervous system 
B) digestive system 
C) respiratory system 
D) reproductive system 
E) excretory system 
A) nervous system 
B) digestive system 
C) respiratory system 
D) reproductive system 
E) excretory system

Question 9

A marine biologist makes a presentation about crustaceans to your biology class.He explains that he has recently received an NSF grant to study sessile crustaceans.You are only aware of one group of sessile crustaceans.This crustacean must be

Accepted Answer

A) a lobster. 
B) a crayfish. 
C) a shrimp. 
D) a barnacle. 
E) the nauplius. 
A) a lobster. 
B) a crayfish. 
C) a shrimp. 
D) a barnacle. 
E) the nauplius.

Question 10

Earthworms show all of the following features except

Accepted Answer

A) containing segments with a mouth on the first and the anus on the last. 
B) containing touch-sensitive and light-sensitive organs in the segments. 
C) containing fewer setae than in polychaetes. 
D) containing distinct head regions and parapodia. 
E) being hermaphroditic. 
A) containing segments with a mouth on the first and the anus on the last. 
B) containing touch-sensitive and light-sensitive organs in the segments. 
C) containing fewer setae than in polychaetes. 
D) containing distinct head regions and parapodia. 
E) being hermaphroditic.

Question 11

Many marine mollusks have distinctive larvae which have their bodies encircled by a row of cilia.These larvae are called

Accepted Answer

A) planulae. 
B) polyps. 
C) miracidia. 
D) zoecia. 
E) trochophores. 
A) planulae. 
B) polyps. 
C) miracidia. 
D) zoecia. 
E) trochophores.

Question 12

The phylum that includes snails,clams,oysters,and octopuses is the

Accepted Answer

A) Ectoprocta. 
B) Brachiopoda. 
C) Mollusca. 
D) Annelida. 
E) Phoronida. 
A) Ectoprocta. 
B) Brachiopoda. 
C) Mollusca. 
D) Annelida. 
E) Phoronida.

Question 13

Humans have direct development,a closed circulatory system,well-developed eyes,and large brains.Which mollusk also shares these features?

Accepted Answer

A) Chiton 
B) Slug 
C) Octopus 
D) Nudibranch 
A) Chiton 
B) Slug 
C) Octopus 
D) Nudibranch

Question 14

The rasping tongue,the radula,is present in which molluscan group?

Accepted Answer

A) bivalve 
B) oyster 
C) clam 
D) snail 
E) scallops 
A) bivalve 
B) oyster 
C) clam 
D) snail 
E) scallops

Question 15

Compound eyes are composed of independent visual units called

Accepted Answer

A) apposition segments. 
B) ocelli. 
C) ommatidia. 
D) retinas. 
E) simple eyes. 
A) apposition segments. 
B) ocelli. 
C) ommatidia. 
D) retinas. 
E) simple eyes.

Question 16

In terms of the number of species,the most successful class of arthropods is

Accepted Answer

A) Hexapoda. 
B) Chelicerata. 
C) Crustacea. 
D) Chilopoda. 
E) Myriapoda. 
A) Hexapoda. 
B) Chelicerata. 
C) Crustacea. 
D) Chilopoda. 
E) Myriapoda.

Question 17

An invertebrate biologist is conducting research with crabs.Her interest is ecdysis.This implies that she studies

Accepted Answer

A) tagmatization processes in crustaceans. 
B) how ommatidia function individually in a compound eye. 
C) how the HOX gene controls the fusion of the head and thorax into the cephalothorax. 
D) how ocelli evolved from mere photoreceptors to imaging lens. 
E) the molting process. 
A) tagmatization processes in crustaceans. 
B) how ommatidia function individually in a compound eye. 
C) how the HOX gene controls the fusion of the head and thorax into the cephalothorax. 
D) how ocelli evolved from mere photoreceptors to imaging lens. 
E) the molting process.

Question 18

A ________ is a circular or U-shaped ridge around the mouth,bearing either one or two rows of ciliated,hollow tentacles.

Accepted Answer

Lophophore

Question 19

The evolutionary innovation that first appeared in arthropods and is characteristic of the most successful of all animal groups is that of

Accepted Answer

A) bilateral symmetry. 
B) coelomic body architecture. 
C) jointed appendages. 
D) segmentation. 
E) three primary types of tissues. 
A) bilateral symmetry. 
B) coelomic body architecture. 
C) jointed appendages. 
D) segmentation. 
E) three primary types of tissues.

Exam 33: Protostomes

Which one of the following statements about the phylum Brachiopoda is false?

The cephalopod mollusks have

Why doesn't a tapeworm have a mouth on its scolex?

Air passage into the trachea of most insects is controlled by the closing and opening of valves,which operate special openings called

Which one of the following incorrectly matches a molluscan group with a feature characterizing that group?

The evolution of jointed appendages has made ________ very successful.

Paramecia use cilia for locomotion and for gathering organic matter.How are rotifers similar?

Which one of the following insect organ systems has placed the greatest limitation on their body size?

A marine biologist makes a presentation about crustaceans to your biology class.He explains that he has recently received an NSF grant to study sessile crustaceans.You are only aware of one group of sessile crustaceans.This crustacean must be

Earthworms show all of the following features except

Many marine mollusks have distinctive larvae which have their bodies encircled by a row of cilia.These larvae are called

The phylum that includes snails,clams,oysters,and octopuses is the

Humans have direct development,a closed circulatory system,well-developed eyes,and large brains.Which mollusk also shares these features?

The rasping tongue,the radula,is present in which molluscan group?

Compound eyes are composed of independent visual units called

In terms of the number of species,the most successful class of arthropods is

An invertebrate biologist is conducting research with crabs.Her interest is ecdysis.This implies that she studies

A ________ is a circular or U-shaped ridge around the mouth,bearing either one or two rows of ciliated,hollow tentacles.

The evolutionary innovation that first appeared in arthropods and is characteristic of the most successful of all animal groups is that of

The Science of Biology

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