Question 1

The anterior region of the digestive tract of enteropneusts contains the gill slits.This region is called the

Accepted Answer

A) pharynx. 
B) esophagus. 
C) buccal cavity. 
D) atrium. 
E) stomach. 
A) pharynx. 
B) esophagus. 
C) buccal cavity. 
D) atrium. 
E) stomach.

Question 2

The echinoderms and hemichordates are

Accepted Answer

A) asymmetrical. 
B) diploblastic. 
C) deuterostomes. 
D) ecdysozoans. 
E) lophotrochozoans. 
A) asymmetrical. 
B) diploblastic. 
C) deuterostomes. 
D) ecdysozoans. 
E) lophotrochozoans.

Question 3

Nutritionally,pterobranchs are

Accepted Answer

A) filter feeders. 
B) parasitic. 
C) mutualistic. 
D) commensalists 
E) predators. 
A) filter feeders. 
B) parasitic. 
C) mutualistic. 
D) commensalists 
E) predators.

Question 4

Acorn worms belong to the class

Accepted Answer

A) Ascidacea. 
B) Concentricycloidea. 
C) Pterobranchia. 
D) Enteropneusta. 
E) Thaliacea. 
A) Ascidacea. 
B) Concentricycloidea. 
C) Pterobranchia. 
D) Enteropneusta. 
E) Thaliacea.

Question 5

Exchange of respiratory gases in enteropneusts is accomplished at the pharyngeal slits and by

Accepted Answer

A) diffusion in alveolar lungs. 
B) active transport in the tracheal system. 
C) diffusion across the body wall. 
D) facilitated diffusion in dermal branchiae. 
E) facilitated diffusion in book gills. 
A) diffusion in alveolar lungs. 
B) active transport in the tracheal system. 
C) diffusion across the body wall. 
D) facilitated diffusion in dermal branchiae. 
E) facilitated diffusion in book gills.

Question 6

Enteropneusta are wormlike as adults and pterobranchia live attached to the substrate.Which of the following are similarities that warrant their inclusion in the common phylum Hemichordata? Check all that apply.

Accepted Answer

A)  Ciliated pharyngeal slits 
B)  Tripartite coelom 
C)  Dorsal nervous system 
D)  Similar feeding habits 
A)  Ciliated pharyngeal slits 
B)  Tripartite coelom 
C)  Dorsal nervous system 
D)  Similar feeding habits

Question 7

The circulatory system of enteropneusts sends blood anteriorly into a series of sinuses called the __________,that may filter excretory wastes.

Accepted Answer

A) nephridium 
B) flame bulb 
C) renette 
D) glomerulus 
E) renal corpuscle 
A) nephridium 
B) flame bulb 
C) renette 
D) glomerulus 
E) renal corpuscle

Question 8

Which of the following echinoderms may contain venom dangerous to humans?

Accepted Answer

A) sea stars 
B) sea lilies 
C) feather stars 
D) brittle stars 
E) sea urchins 
A) sea stars 
B) sea lilies 
C) feather stars 
D) brittle stars 
E) sea urchins

Question 9

Enteropneusta and Pterobranchia are classes of animals within the phylum Hemichordata.Which of the following characters could be used to distinguish between members of these two classes?

Accepted Answer

A) Filter feeding vs.deposit feeding 
B) Open vs.closed circulatory system 
C) Presence or absence of pharyngeal slits 
D) Dorsal vs.ventral nervous system 
A) Filter feeding vs.deposit feeding 
B) Open vs.closed circulatory system 
C) Presence or absence of pharyngeal slits 
D) Dorsal vs.ventral nervous system

Question 10

When feeding on a bivalve,a sea star everts the _______ from its body.

Accepted Answer

A) gizzard 
B) crop 
C) oral (cardiac) stomach 
D) pylorus 
E) rectal cecum 
A) gizzard 
B) crop 
C) oral (cardiac) stomach 
D) pylorus 
E) rectal cecum

Question 11

In sea stars,thin folds of the body wall that function in respiration are called

Accepted Answer

A) filamentous gills. 
B) ctenidia. 
C) Polian vesicles. 
D) book gills. 
E) dermal branchiae. 
A) filamentous gills. 
B) ctenidia. 
C) Polian vesicles. 
D) book gills. 
E) dermal branchiae.

Question 12

The major secretory and absorptive structures of the sea star digestive system are the

Accepted Answer

A) cardiac stomachs. 
B) rectal ceca. 
C) Polian vesicles. 
D) pyloric ceca. 
E) Tiedemann's bodies. 
A) cardiac stomachs. 
B) rectal ceca. 
C) Polian vesicles. 
D) pyloric ceca. 
E) Tiedemann's bodies.

Question 13

In sea stars,the __________ surface is the upper surface of the animal and contains the madreporite.

Accepted Answer

A) aboral 
B) oral 
C) madreporite 
D) anal 
E) rigid 
A) aboral 
B) oral 
C) madreporite 
D) anal 
E) rigid

Question 14

Echinoderms from this class have been over harvested around the Galàpagos islands,as they have become increasingly popular for both culinary and medicinal uses.

Accepted Answer

A) Holothuroidea 
B) Asteroidea 
C) Ophiuroidea 
D) Echinoidea 
E) Crinoidea 
A) Holothuroidea 
B) Asteroidea 
C) Ophiuroidea 
D) Echinoidea 
E) Crinoidea

Question 15

The primary circulatory medium in echinoids is

Accepted Answer

A) blood. 
B) hemal fluid. 
C) plasma. 
D) coelomic fluid. 
E) pyloric cecae. 
A) blood. 
B) hemal fluid. 
C) plasma. 
D) coelomic fluid. 
E) pyloric cecae.

Question 16

Sea urchins and sand dollars belong to the echinoderm class

Accepted Answer

A) Crinoidea. 
B) Asteroidea. 
C) Ophiuroidea. 
D) Holothuroidea. 
E) Echinoidea. 
A) Crinoidea. 
B) Asteroidea. 
C) Ophiuroidea. 
D) Holothuroidea. 
E) Echinoidea.

Question 17

As deuterostomes,the echinoderms and hemichordates share all of the following developmental characteristics except one.

Accepted Answer

A) The anus develops from the blastopore. 
B) The coelom forms from outpockets of the embryonic gut tract. 
C) The cleavage is radial. 
D) The cleavage is determinate. 
E) The larval forms are bilaterally symmetrical and ciliated. 
A) The anus develops from the blastopore. 
B) The coelom forms from outpockets of the embryonic gut tract. 
C) The cleavage is radial. 
D) The cleavage is determinate. 
E) The larval forms are bilaterally symmetrical and ciliated.

Question 18

Which is the only class of echinoderms where the oral surface is not oriented to the substrate?

Accepted Answer

A) Asteroidea. 
B) Ophiuroidea. 
C) Holothuroidea 
D) Crinoidea. 
E) Echinoidea. 
A) Asteroidea. 
B) Ophiuroidea. 
C) Holothuroidea 
D) Crinoidea. 
E) Echinoidea.

Question 19

Sea lilies and feather stars belong to the echinoderm class

Accepted Answer

A) Holothuroidea. 
B) Asteroidea. 
C) Ophiuroidea. 
D) Concentricycloidea. 
E) Crinoidea. 
A) Holothuroidea. 
B) Asteroidea. 
C) Ophiuroidea. 
D) Concentricycloidea. 
E) Crinoidea.

Question 20

The function of Aristotle's lantern is

Accepted Answer

A) protection. 
B) digestion. 
C) chewing. 
D) locomotion. 
E) regeneration. 
A) protection. 
B) digestion. 
C) chewing. 
D) locomotion. 
E) regeneration.

Exam 16: Ambulacraria: Echinoderms and Hemichordates

The anterior region of the digestive tract of enteropneusts contains the gill slits.This region is called the

The echinoderms and hemichordates are

Nutritionally,pterobranchs are

Acorn worms belong to the class

Exchange of respiratory gases in enteropneusts is accomplished at the pharyngeal slits and by

Enteropneusta are wormlike as adults and pterobranchia live attached to the substrate.Which of the following are similarities that warrant their inclusion in the common phylum Hemichordata? Check all that apply.

The circulatory system of enteropneusts sends blood anteriorly into a series of sinuses called the __________,that may filter excretory wastes.

Which of the following echinoderms may contain venom dangerous to humans?

Enteropneusta and Pterobranchia are classes of animals within the phylum Hemichordata.Which of the following characters could be used to distinguish between members of these two classes?

When feeding on a bivalve,a sea star everts the _______ from its body.

In sea stars,thin folds of the body wall that function in respiration are called

The major secretory and absorptive structures of the sea star digestive system are the

In sea stars,the __________ surface is the upper surface of the animal and contains the madreporite.

Echinoderms from this class have been over harvested around the Galàpagos islands,as they have become increasingly popular for both culinary and medicinal uses.

The primary circulatory medium in echinoids is

Sea urchins and sand dollars belong to the echinoderm class

As deuterostomes,the echinoderms and hemichordates share all of the following developmental characteristics except one.

Which is the only class of echinoderms where the oral surface is not oriented to the substrate?

Sea lilies and feather stars belong to the echinoderm class

The function of Aristotle's lantern is

Zoology: an Evolutionary and Ecological Perspective

Cells, tissues, organs, and Organ Systems of Animals

Cell Division and Inheritance

Evolution: History and Evidence

Evolution and Gene Frequencies

Ecology: Preserving the Animal Kingdom

Animal Taxonomy, phylogeny, and Organization

Animal-Like Protists: the Protozoa

Multicellular and Tissue Levels of Organization

The Smaller Lophotrochozoan Phyla

Molluscan Success

Annelida: the Metameric Body Form

The Smaller Ecdysozoan Phyla

The Arthropods: Blueprint for Success

The Pancrustacea: Crustacea and Hexapoda

Chordata: Urochordata and Cephalochordata

The Fishes: Vertebrate Success in Water

Amphibians: the First Terrestrial Vertebrates

Reptiles: Diapsid Amniotes

Birds: Reptiles by Another Name

Mammals: Synapsid Amniotes

Protection, support, and Movement

Communication I: Nervous and Sensory Systems

Communication II: the Endocrine System and Chemical Messengers

Circulation and Gas Exchange

Nutrition and Digestion

Temperature and Body Fluid Regulation

Reproduction and Development

Filters