Question 1

Nematocysts are

Accepted Answer

A)  widespread among the animal kingdom but first developed by Cnidaria. 
B)  formed and used only by Cnidaria although a few other organisms may "steal" them. 
C)  first found in sponges, most highly developed in cnidarians, but still found as remnants in some higher groups. 
D)  actually free-living symbionts that are most usually taken up by cnidarians, as are many green algae. 
E)  None of the choices are correct 
A)  widespread among the animal kingdom but first developed by Cnidaria. 
B)  formed and used only by Cnidaria although a few other organisms may "steal" them. 
C)  first found in sponges, most highly developed in cnidarians, but still found as remnants in some higher groups. 
D)  actually free-living symbionts that are most usually taken up by cnidarians, as are many green algae. 
E)  None of the choices are correct

Question 2

Which of the following is NOT a cnidarian?

Accepted Answer

A)  Corals 
B)  Planaria 
C)  Sea anemones 
D)  Hydrozoa 
E)  Portuguese manofwar 
A)  Corals 
B)  Planaria 
C)  Sea anemones 
D)  Hydrozoa 
E)  Portuguese manofwar

Question 3

The tall secretory cells around the pedal disc and mouth of hydra are the ______ cells.

Accepted Answer

The answer of The tall secretory cells around the pedal...

Question 4

Discuss the evidence for the phylogenetic placement of Ctenophores and Cnidarians in the metazoan tree.

Accepted Answer

The phylogenetic placement of Ctenophore

Question 5

Which of the following is NOT a correct description of cnidarian nervous tissues?

Accepted Answer

A)  Hydrozoan medusae have ring nerves 
B)  Scyphozoan medusae have marginal sense organs 
C)  The nerve net synapses with both the nematocysts and the epitheliomuscular cells 
D)  Scyphozoa have both a fast conducting and a slow conducting system to coordinate movements 
E)  Cnidaria are the first animals to develop a central nervous system 
A)  Hydrozoan medusae have ring nerves 
B)  Scyphozoan medusae have marginal sense organs 
C)  The nerve net synapses with both the nematocysts and the epitheliomuscular cells 
D)  Scyphozoa have both a fast conducting and a slow conducting system to coordinate movements 
E)  Cnidaria are the first animals to develop a central nervous system

Question 6

Describe how food absorption in sponges differs from food absorption in Cnidaria.

Accepted Answer

Food absorption in sponges differs from

Question 7

The presence of ameboid cells and fibers in the mesoglea,as well as lack of a velum,would indicate that a medusa was in the class

Accepted Answer

A)  hydrozoa. 
B)  scyphozoa. 
C)  anthozoa. 
D)  ctenophora. 
E)  cubozoa. 
A)  hydrozoa. 
B)  scyphozoa. 
C)  anthozoa. 
D)  ctenophora. 
E)  cubozoa.

Question 8

Throughout most cnidarian groups,the basal or pedal disc serves to

Accepted Answer

A)  be the base of the tentacles. 
B)  attach the cnidarian to the substrate. 
C)  generate buds. 
D)  perform extracellular digestion. 
E)  harbor sensory cells. 
A)  be the base of the tentacles. 
B)  attach the cnidarian to the substrate. 
C)  generate buds. 
D)  perform extracellular digestion. 
E)  harbor sensory cells.

Question 9

The class of radiate animals with the most conspicuous medusa stage is

Accepted Answer

A)  hydrozoa. 
B)  scyphozoa. 
C)  anthozoa. 
D)  ctenophora. 
E)  cubozoa. 
A)  hydrozoa. 
B)  scyphozoa. 
C)  anthozoa. 
D)  ctenophora. 
E)  cubozoa.

Question 10

The morphological type of cnidarian adapted to a sedentary or sessile life is the polyp,and the type best adapted for floating or free-swimming existence is the ___________.

Accepted Answer

The answer of The morphological type of cnidarian adapted to...

Question 11

Discuss the evolution of the Mesozoa,the Parazoa,and the Cnidaria.What are the common features shared by these groups?

Accepted Answer

The Mesozoa, Parazoa, and Cnidaria are a

Question 12

Explain why the presence of a gelatinous layer between the ectoderm and endoderm in ctenophores and cnidarians make understanding the branching order of these phyla difficult.

Accepted Answer

The presence of a gelatinous layer betwe

Question 13

Which of the following associations of cubozoan traits is NOT correct?

Accepted Answer

A)  Velarium-where the subumbrellar edge turns inward 
B)  Pedalium-a flat, tough blade at the base of each tentacle 
C)  Ephyrae-a major stage of cubozoans between polyps and medusae 
D)  Medusae-in cross section, almost square 
E)  None of the choices are correct 
A)  Velarium-where the subumbrellar edge turns inward 
B)  Pedalium-a flat, tough blade at the base of each tentacle 
C)  Ephyrae-a major stage of cubozoans between polyps and medusae 
D)  Medusae-in cross section, almost square 
E)  None of the choices are correct

Question 14

A distinguishing characteristic of cubozoan medusae is the presence of flattened blades called ___________ at the base of the tentacles.

Accepted Answer

The answer of A distinguishing characteristic of cubozoan medusae is...

Question 15

Hydra reproduces asexually by

Accepted Answer

A)  buds. 
B)  nematocysts. 
C)  gland cells. 
D)  gametes. 
E)  gastrozooids. 
A)  buds. 
B)  nematocysts. 
C)  gland cells. 
D)  gametes. 
E)  gastrozooids.

Question 16

The function of the rhopalium is

Accepted Answer

A)  digestive. 
B)  respiratory. 
C)  food capture. 
D)  sensory. 
E)  reproductive. 
A)  digestive. 
B)  respiratory. 
C)  food capture. 
D)  sensory. 
E)  reproductive.

Question 17

If you removed the statocyst from a ctenophore,the most likely symptom you would notice would be

Accepted Answer

A)  they would sting other ctenophores. 
B)  disorientation or swimming in a haphazard manner. 
C)  inability to expel wastes. 
D)  prevention of respiration. 
E)  lack of reproduction. 
A)  they would sting other ctenophores. 
B)  disorientation or swimming in a haphazard manner. 
C)  inability to expel wastes. 
D)  prevention of respiration. 
E)  lack of reproduction.

Question 18

The correct sequence in the life cycle of the jellyfish Aurelia is

Accepted Answer

A)  planula, ephyra, scyphistoma. 
B)  scyphistoma, planula, ephyra. 
C)  planula, scyphistoma, ephyra. 
D)  ephyra, planula, scyphistoma. 
E)  None of the choices are correct 
A)  planula, ephyra, scyphistoma. 
B)  scyphistoma, planula, ephyra. 
C)  planula, scyphistoma, ephyra. 
D)  ephyra, planula, scyphistoma. 
E)  None of the choices are correct

Question 19

The class Hydrozoa contains Hydra,Obelia,and

Accepted Answer

A)  the Portuguese manofwar. 
B)  aurelia. 
C)  the sea anemones. 
D)  most of the corals. 
E)  None of the choices are correct 
A)  the Portuguese manofwar. 
B)  aurelia. 
C)  the sea anemones. 
D)  most of the corals. 
E)  None of the choices are correct

Question 20

The part of a coral reef that slopes down into the lagoon is the ________ ________ or fore reef slope.

Accepted Answer

The answer of The part of a coral reef that...

Exam 13: Radiate Animals

Nematocysts are

Which of the following is NOT a cnidarian?

The tall secretory cells around the pedal disc and mouth of hydra are the ______ cells.

Discuss the evidence for the phylogenetic placement of Ctenophores and Cnidarians in the metazoan tree.

Which of the following is NOT a correct description of cnidarian nervous tissues?

Describe how food absorption in sponges differs from food absorption in Cnidaria.

The presence of ameboid cells and fibers in the mesoglea,as well as lack of a velum,would indicate that a medusa was in the class

Throughout most cnidarian groups,the basal or pedal disc serves to

The class of radiate animals with the most conspicuous medusa stage is

The morphological type of cnidarian adapted to a sedentary or sessile life is the polyp,and the type best adapted for floating or free-swimming existence is the ___________.

Discuss the evolution of the Mesozoa,the Parazoa,and the Cnidaria.What are the common features shared by these groups?

Explain why the presence of a gelatinous layer between the ectoderm and endoderm in ctenophores and cnidarians make understanding the branching order of these phyla difficult.

Which of the following associations of cubozoan traits is NOT correct?

A distinguishing characteristic of cubozoan medusae is the presence of flattened blades called ___________ at the base of the tentacles.

Hydra reproduces asexually by

The function of the rhopalium is

If you removed the statocyst from a ctenophore,the most likely symptom you would notice would be

The correct sequence in the life cycle of the jellyfish Aurelia is

The class Hydrozoa contains Hydra,Obelia,and

The part of a coral reef that slopes down into the lagoon is the ________ ________ or fore reef slope.

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

Acoelomorpha,Platyzoa,and Mesozoa

Polyzoa and Kryptrochozoa

Molluscs

Annelids and Allied Taxa

Smaller Ecdysozoans

Trilobites, Chelicerates, and Myriapods

Crustaceans

Support, Protection, and Movement

Chaetognaths, Echinoderms, and Hemichordates

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

The part of a coral reef that slopes down into the lagoon is the or fore reef slope.