Question 1

The calcareous plates found underneath the epidermis are called the

Accepted Answer

A)  Ambulacrae. 
B)  Tiedemann's bodies. 
C)  Madreporite. 
D)  Pedicellariae. 
E)  Ossicles. 
A)  Ambulacrae. 
B)  Tiedemann's bodies. 
C)  Madreporite. 
D)  Pedicellariae. 
E)  Ossicles.

Question 2

The pores leading to both the protocoel and paired coelomic cavities of the enteropneust hemichordates allow

Accepted Answer

A)  fertilization of eggs by sperm. 
B)  exchange of fluids for a low efficiency respiratory system. 
C)  water to be drawn in to stiffen the chambers to aid in burrowing. 
D)  excretion of wastes. 
E)  movement of ions and water to keep an osmotic balance. 
A)  fertilization of eggs by sperm. 
B)  exchange of fluids for a low efficiency respiratory system. 
C)  water to be drawn in to stiffen the chambers to aid in burrowing. 
D)  excretion of wastes. 
E)  movement of ions and water to keep an osmotic balance.

Question 3

A sea star feeds by absorbing food through the

Accepted Answer

A)  tube feet on the tentacles. 
B)  dermal calcareous ossicles. 
C)  stone and ring canals. 
D)  lower part of stomach which is everted. 
E)  sieve plate. 
A)  tube feet on the tentacles. 
B)  dermal calcareous ossicles. 
C)  stone and ring canals. 
D)  lower part of stomach which is everted. 
E)  sieve plate.

Question 4

Chaetognaths are also known as ______ ______.

Accepted Answer

The answer of Chaetognaths are also known as ______ ______....

Question 5

Arrow worm reproduction and development involves

Accepted Answer

A)  separate male and female individuals. 
B)  a larval stage that lacks sense organs. 
C)  a coelom but there is no peritoneum lining. 
D)  spiral and unequal cleavage. 
E)  a coelom formed from the archenteron extending backward, not from pinched off coelomic sacs. 
A)  separate male and female individuals. 
B)  a larval stage that lacks sense organs. 
C)  a coelom but there is no peritoneum lining. 
D)  spiral and unequal cleavage. 
E)  a coelom formed from the archenteron extending backward, not from pinched off coelomic sacs.

Question 6

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

Accepted Answer

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

Question 7

In brittle stars,water circulates into the _______________ for gaseous exchange.

Accepted Answer

The answer of In brittle stars,water circulates into the _______________...

Question 8

The respiratory tree of a sea cucumber is

Accepted Answer

A)  not present in other echinoderms. 
B)  branches off the cloaca of the animal. 
C)  also serving in excretion. 
D)  not a replacement for gas exchange through the skin and tube feet. 
E)  All of the choices are correct. 
A)  not present in other echinoderms. 
B)  branches off the cloaca of the animal. 
C)  also serving in excretion. 
D)  not a replacement for gas exchange through the skin and tube feet. 
E)  All of the choices are correct.

Question 9

Echinoderms are

Accepted Answer

A)  mostly pelagic or free-swimming in open ocean. 
B)  benthic. 
C)  parasitic. 
D)  mostly particle feeders. 
E)  fish predators. 
A)  mostly pelagic or free-swimming in open ocean. 
B)  benthic. 
C)  parasitic. 
D)  mostly particle feeders. 
E)  fish predators.

Question 10

Structures in each arm of a sea star include the gonads,the system that works the tube feet,and

Accepted Answer

A)  kidneys. 
B)  hearts of a circulatory system. 
C)  pyloric ceca that produce digestive fluids for extracellular digestion. 
D)  the intestine that collects large amounts of wastes to expel through the anus. 
E)  gills. 
A)  kidneys. 
B)  hearts of a circulatory system. 
C)  pyloric ceca that produce digestive fluids for extracellular digestion. 
D)  the intestine that collects large amounts of wastes to expel through the anus. 
E)  gills.

Question 11

The crinoids

Accepted Answer

A)  have the most primitive characters 
B)  have far fewer living species than are found in the fossil record 
C)  include the shallow-water feather stars of tropical oceans 
D)  include sea lilies that resemble a stalked flower 
E)  all of the choices are correct 
A)  have the most primitive characters 
B)  have far fewer living species than are found in the fossil record 
C)  include the shallow-water feather stars of tropical oceans 
D)  include sea lilies that resemble a stalked flower 
E)  all of the choices are correct

Question 12

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 13

The respiratory tree of sea cucumbers opens into the _________________.

Accepted Answer

The answer of The respiratory tree of sea cucumbers opens...

Question 14

How much nervous system does an echinoderm have? Sea stars have

Accepted Answer

A)  a complex of nerve ganglia in each ray. 
B)  a central nervous system including a brain. 
C)  a simple nerve ring and radial nerves leading to simple sensory cells scattered over the epidermis. 
D)  no genuine nerve cells are found in echinoderms; they operate completely by a hydraulic system. 
A)  a complex of nerve ganglia in each ray. 
B)  a central nervous system including a brain. 
C)  a simple nerve ring and radial nerves leading to simple sensory cells scattered over the epidermis. 
D)  no genuine nerve cells are found in echinoderms; they operate completely by a hydraulic system.

Question 15

The gill slits of enteropneust hemichordates function to

Accepted Answer

A)  house gills. 
B)  strain food out of the water on the mucus-coated gill slits. 
C)  allow water to exit after food has been gathered from the inflow. 
D)  orient the animal in the water. 
E)  excrete wastes. 
A)  house gills. 
B)  strain food out of the water on the mucus-coated gill slits. 
C)  allow water to exit after food has been gathered from the inflow. 
D)  orient the animal in the water. 
E)  excrete wastes.

Question 16

Treating sea urchin eggs with hypertonic seawater or subjecting them to other stimuli causes them to develop without the presence of sperm,a phenomenon called

Accepted Answer

A)  isogamy 
B)  polyspermy. 
C)  artificial insemination. 
D)  artificial parthenogenesis. 
E)  fertilization sensitivity. 
A)  isogamy 
B)  polyspermy. 
C)  artificial insemination. 
D)  artificial parthenogenesis. 
E)  fertilization sensitivity.

Question 17

The five pairs of bursae in brittle stars are used for

Accepted Answer

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

Question 18

Minute,pincer-like ___________________ are found on the surfaces of many sea stars.

Accepted Answer

The answer of Minute,pincer-like ___________________ are found on the surfaces...

Question 19

The water vascular system is derived embryologically from the left _______ ________ ________.

Accepted Answer

anterior c

Question 20

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 are 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 are correct.

Exam 22: Chaetognaths, Echinoderms, and Hemichordates

The calcareous plates found underneath the epidermis are called the

The pores leading to both the protocoel and paired coelomic cavities of the enteropneust hemichordates allow

A sea star feeds by absorbing food through the

Chaetognaths are also known as ______ ______.

Arrow worm reproduction and development involves

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

In brittle stars,water circulates into the _______________ for gaseous exchange.

The respiratory tree of a sea cucumber is

Echinoderms are

Structures in each arm of a sea star include the gonads,the system that works the tube feet,and

The crinoids

The respiratory tree of sea cucumbers opens into the _________________.

How much nervous system does an echinoderm have? Sea stars have

The gill slits of enteropneust hemichordates function to

Treating sea urchin eggs with hypertonic seawater or subjecting them to other stimuli causes them to develop without the presence of sperm,a phenomenon called

The five pairs of bursae in brittle stars are used for

Minute,pincer-like ___________________ are found on the surfaces of many sea stars.

The water vascular system is derived embryologically from the left _______ ________ ________.

The hemichordate "notochord" is

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

Architectural Pattern of an Animal

Taxonomy and Phylogeny of Animals

Unicellular Eukaryotes

Sponges and Placozoans

Radiate Animals

Acoelomorpha,Platyzoa,and Mesozoa

Polyzoa and Kryptrochozoa

Molluscs

Annelids and Allied Taxa

Smaller Ecdysozoans

Trilobites, Chelicerates, and Myriapods

Crustaceans

Support, Protection, and Movement

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 Distributions

Animal Ecology

Filters

Chaetognaths are also known as .

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

The water vascular system is derived embryologically from the left _ __.