Question 1

The excretory system of an enteropneust hemichordate (or acorn worm)consists of

Accepted Answer

A) a glomerulus or network of blood vessels that surround the sinus and buccal diverticulum. 
B) a rich supply of blood vessels in the gill slits. 
C) a network of flame cells at the periphery. 
D) a simple metanephridium that empties into the cloaca. 
E) a network of vessels under the epidermis. 
A) a glomerulus or network of blood vessels that surround the sinus and buccal diverticulum. 
B) a rich supply of blood vessels in the gill slits. 
C) a network of flame cells at the periphery. 
D) a simple metanephridium that empties into the cloaca. 
E) a network of vessels under the epidermis. A

Question 2

The Class Enteropneusta are also known as __________________.

Accepted Answer

acorn worms

Question 3

On the inner end of each tube foot is a muscular sac called an ______________.

Accepted Answer

ampulla

Question 4

Hemichordates show relationships to

Accepted Answer

A) arrow-worms. 
B) arthropods and annelids. 
C) molluscs and echinoderms. 
D) annelids and echinoderms. 
E) both the echinoderms and the chordates. 
A) arrow-worms. 
B) arthropods and annelids. 
C) molluscs and echinoderms. 
D) annelids and echinoderms. 
E) both the echinoderms and the chordates.

Question 5

If you went to the ocean and brought back a sea star to keep in a marine aquarium,what would you feed it?

Accepted Answer

A) Algae 
B) Live clams 
C) Live fish 
D) Water in plankton since they are filter feeders 
E) Living coral 
A) Algae 
B) Live clams 
C) Live fish 
D) Water in plankton since they are filter feeders 
E) Living coral

Question 6

Hemichordates live

Accepted Answer

A) in the open ocean with a similar lifestyle to arrow-worms (which is why they are considered related). 
B) in kelp beds. 
C) in deep oceans,especially the rich and oxygenated Arctic Ocean. 
D) on the bottom of shallow oceans,sometimes colonially and in secreted tubes. 
E) just around thermal vents. 
A) in the open ocean with a similar lifestyle to arrow-worms (which is why they are considered related). 
B) in kelp beds. 
C) in deep oceans,especially the rich and oxygenated Arctic Ocean. 
D) on the bottom of shallow oceans,sometimes colonially and in secreted tubes. 
E) just around thermal vents.

Question 7

The early embryology of hemichordates is much like that of the ___________________.

Accepted Answer

The answer of The early embryology of hemichordates is much...

Question 8

Which is NOT a correct association of structure and function in sea star anatomy?

Accepted Answer

A) Ampullae-end of the tube foot that bears the sucker 
B) Polian vesicles-fluid storage 
C) Tiedemann's bodies-production of coelomocytes 
D) Lateral canals-connects the radial canal to the tube feet and has one-way valves 
E) Stone canal-joins the madreporite and ring canal 
A) Ampullae-end of the tube foot that bears the sucker 
B) Polian vesicles-fluid storage 
C) Tiedemann's bodies-production of coelomocytes 
D) Lateral canals-connects the radial canal to the tube feet and has one-way valves 
E) Stone canal-joins the madreporite and ring canal

Question 9

Echinoderm evolution is controversial but most zoologists agree that ___________ are related and form one clade.

Accepted Answer

A) sea stars and brittle stars 
B) sea stars and sea urchins 
C) sea stars and sea cucumbers 
D) sea urchins and sea cucumbers 
E) crinoids and sea urchins 
A) sea stars and brittle stars 
B) sea stars and sea urchins 
C) sea stars and sea cucumbers 
D) sea urchins and sea cucumbers 
E) crinoids and sea urchins

Question 10

If you examined a biology class chart from the first half of the last century,the echinoderm sheet would be found immediately following the cnidarian sheet,a very primitive location in the survey of the phyla.Today we discuss echinoderms as one of the last invertebrate groups before studying chordates.Describe why we have changed our perspective on the evolutionary placement of echinoderms.

Accepted Answer

Our perspective on the evolutionary plac

Question 11

The larvae of echinoderms have ______________ symmetry.

Accepted Answer

The answer of The larvae of echinoderms have ______________ symmetry....

Question 12

The larva of enteropneust hemichordates is known as a ________________.

Accepted Answer

The answer of The larva of enteropneust hemichordates is known...

Question 13

A complex chewing apparatus found in many urchins is the _________ _________.

Accepted Answer

The answer of A complex chewing apparatus found in many...

Question 14

The hemichordate "notochord" is

Accepted Answer

A) the feature proposed by Bateson to include this animal with the chordates. 
B) a buccal diverticulum. 
C) not homologous with the chordate notochord. 
D) All of the choices are correct. 
E) None of the choices is correct. 
A) the feature proposed by Bateson to include this animal with the chordates. 
B) a buccal diverticulum. 
C) not homologous with the chordate notochord. 
D) All of the choices are correct. 
E) None of the choices is correct.

Question 15

Water enters the water vascular system of a sea star through a porous plate on the aboral surface called the

Accepted Answer

A) aristotle's lantern. 
B) pedicellariae. 
C) madreporite or sieve plate. 
D) ossicles. 
E) ambulacrum. 
A) aristotle's lantern. 
B) pedicellariae. 
C) madreporite or sieve plate. 
D) ossicles. 
E) ambulacrum.

Question 16

Describe the human response to the impact of sea star predators in oyster beds and include how the remedy for eliminating sea stars does not also eliminate the oysters.

Accepted Answer

The human response to the impact of sea

Question 17

The function of the papulae in the sea star is

Accepted Answer

A) respiration. 
B) excretion. 
C) reproduction. 
D) digestion. 
E) defense and protection. 
A) respiration. 
B) excretion. 
C) reproduction. 
D) digestion. 
E) defense and protection.

Question 18

Hemichordates were not recognized until the 1800s because they

Accepted Answer

A) were considered roundworms. 
B) are very rare. 
C) are common but only around deep ocean vents. 
D) have recently dramatically increased in numbers. 
E) had secretive habits and fragile bodies. 
A) were considered roundworms. 
B) are very rare. 
C) are common but only around deep ocean vents. 
D) have recently dramatically increased in numbers. 
E) had secretive habits and fragile bodies.

Question 19

On a laboratory practical exam,you are presented with an unknown specimen.You know it either belongs to the Phylum Xenoturbellida or to the Phylum Echonodermata.What characteristic would you look for that would tell you that the specimen is from the Phylum Xenoturbellida and not the Phylum Echinodermata?

Accepted Answer

A) Bilateral symmetry 
B) Diffuse nervous system 
C) Endoskeleton of ossicles 
D) Lack of cephalization 
A) Bilateral symmetry 
B) Diffuse nervous system 
C) Endoskeleton of ossicles 
D) Lack of cephalization

Question 20

Hemichordates are marine animals that were formerly considered a subphylum of ____________.

Accepted Answer

The answer of Hemichordates are marine animals that were formerly...

Exam 22: Chaetognaths, echinoderms, and Hemichordates

The excretory system of an enteropneust hemichordate (or acorn worm)consists of

The Class Enteropneusta are also known as __________________.

On the inner end of each tube foot is a muscular sac called an ______________.

Hemichordates show relationships to

If you went to the ocean and brought back a sea star to keep in a marine aquarium,what would you feed it?

Hemichordates live

The early embryology of hemichordates is much like that of the ___________________.

Which is NOT a correct association of structure and function in sea star anatomy?

Echinoderm evolution is controversial but most zoologists agree that ___________ are related and form one clade.

The larvae of echinoderms have ______________ symmetry.

The larva of enteropneust hemichordates is known as a ________________.

A complex chewing apparatus found in many urchins is the _________ _________.

The hemichordate "notochord" is

Water enters the water vascular system of a sea star through a porous plate on the aboral surface called the

Describe the human response to the impact of sea star predators in oyster beds and include how the remedy for eliminating sea stars does not also eliminate the oysters.

The function of the papulae in the sea star is

Hemichordates were not recognized until the 1800s because they

Hemichordates are marine animals that were formerly considered a subphylum of ____________.

Life: Biological Principles and the Science of Zoology

The Origin and Chemistry of Life

Cells As Units of Life

Cellular Metabolism

Genetics: a Review

Organic Evolution

The Reproductive Process

Principles of Development

Architectual Pattern of an Animal

Taxonomy and Phylogeny of Animals

Unicellular Eukaryotes

Sponges and Placozoans

Cnidarians and Ctenophores

Acoelomorpha, Platyzoa, and Mesozoa

Polyzoa and Kryptrochozoa

Molluscs

Annelids and Allied Taxa

Smaller Ecdysozoans

Trilobites, Chelicerates, and Myriapods

Crustaceans

Hexapods

Chordates

Fishes

Early Tetrapods and Modern Amphibians

Amniote Origins and Nonavian Reptiles

Birds

Mammals

Support, Protection, and Movement

Homeostasis: Osmotic Regulation, Excretion, and Temperature Regulation

Homeostasis: Internal Fluids and Respiration

Digestion and Nutrition

Nervous Coordination: Nervous System and Sense Organs

Chemical Coordination: Endocrine System

Immunity

Animal Behavior

Animal Distribution

Animal Ecology

Filters

A complex chewing apparatus found in many urchins is the _ _.