Question 1

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.F) A) and E)
G) A) and D)

Question 2

The Class Enteropneusta are also known as __________________.

Accepted Answer

acorn worms

Question 3

The larva of enteropneust hemichordates is known as a ________________.

Accepted Answer

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

Question 4

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 5

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.F) A) and E)
G) C) and D)

Question 6

The function of the papulae in the sea star is

Accepted Answer

A)  respiration.
B)  excretion.
C)  reproduction.
D)  digestion.
E)  defense and protection.F) None of the above
G) C) and E)

Question 7

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 urchinsF) A) and B)
G) C) and E)

Question 8

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.F) B) and D)
G) A) and B)

Question 9

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.F) A) and B)
G) A) and C)

Question 10

The larvae of echinoderms have ______________ symmetry.

Accepted Answer

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

Question 11

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

Accepted Answer

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

Question 12

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

Accepted Answer

ampulla

Question 13

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

Accepted Answer

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

Question 14

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 canalF) None of the above
G) A) and E)

Question 15

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 16

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 coralF) C) and D)
G) A) and E)

Question 17

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 cephalizationE) B) and D)
F) B) and C)

Question 18

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

Accepted Answer

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

Question 19

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.F) A) and B)
G) A) and C)

Question 20

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.F) B) and E)
G) C) and D) A

Exam 22: Chaetognaths, echinoderms, and Hemichordates

The hemichordate "notochord" is

Correct Answer
verified

The Class Enteropneusta are also known as __________________.

Correct Answer
verified
acorn worms

The larva of enteropneust hemichordates is known as a ________________.

Correct Answer
verified

Correct Answer
Answered by ExamLex AI
Our perspective on the evolutionary plac...
View Answer

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

Correct Answer
verified

The function of the papulae in the sea star is

Correct Answer
verified

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

Correct Answer
verified

Hemichordates live

Correct Answer
verified

Hemichordates show relationships to

Correct Answer
verified

The larvae of echinoderms have ______________ symmetry.

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified
ampulla

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

Correct Answer
verified

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

Correct Answer
verified

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.

Correct Answer
Answered by ExamLex AI
The human response to the impact of sea ...
View Answer

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

Correct Answer
verified

Correct Answer
verified

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

Correct Answer
verified

Hemichordates were not recognized until the 1800s because they

Correct Answer
verified

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

Correct Answer
verified
A

Exam 22: Chaetognaths, echinoderms, and Hemichordates

The hemichordate "notochord" is

Correct AnswerverifiedShow Answer

The Class Enteropneusta are also known as __________________.

Correct Answerverifiedacorn worms

The larva of enteropneust hemichordates is known as a ________________.

Correct AnswerverifiedShow Answer

Correct AnswerAnswered by ExamLex AIOur perspective on the evolutionary plac...View AnswerShow Answer

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

Correct AnswerverifiedShow Answer

The function of the papulae in the sea star is

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Hemichordates live

Correct AnswerverifiedShow Answer

Hemichordates show relationships to

Correct AnswerverifiedShow Answer

The larvae of echinoderms have ______________ symmetry.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct Answerverifiedampulla

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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.

Correct AnswerAnswered by ExamLex AIThe human response to the impact of sea ...View AnswerShow Answer

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

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Hemichordates were not recognized until the 1800s because they

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedA

Correct Answer
verified

Correct Answer
verified
acorn worms

Correct Answer
verified

Correct Answer
Answered by ExamLex AI
Our perspective on the evolutionary plac...
View Answer

Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
verified
ampulla

Correct Answer
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Correct Answer
verified

Correct Answer
Answered by ExamLex AI
The human response to the impact of sea ...
View Answer

Correct Answer
verified

Correct Answer
verified

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

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
A