Question 1

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 2

A living anemone must detect non-living debris that floats by from potential food that also move past it.How does it detect the difference?

Accepted Answer

A) It responds to anything with DNA as living 
B) It has a feeding response to certain chemicals such as glutathione and asparagine 
C) They respond to vibrations that match the frequency of prey 
D) There is a feeding response to certain chemicals such as glutathione and asparagine;additionally they respond to vibrations that match the frequency of prey 
E) They merely sample everything that moves and discard the inorganic debris 
A) It responds to anything with DNA as living 
B) It has a feeding response to certain chemicals such as glutathione and asparagine 
C) They respond to vibrations that match the frequency of prey 
D) There is a feeding response to certain chemicals such as glutathione and asparagine;additionally they respond to vibrations that match the frequency of prey 
E) They merely sample everything that moves and discard the inorganic debris

Question 3

The free-swimming __________ larva is similar to an adult ctenophore and develops directly into an adult.

Accepted Answer

The answer of The free-swimming __________ larva is similar to...

Question 4

The presence of amoeboid 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 5

Hermatypic corals have mutualistic algal cells in their tissues called

Accepted Answer

A) coralline algae. 
B) zooxanthellae. 
C) kelp. 
D) euglena. 
E) colloblasts. 
A) coralline algae. 
B) zooxanthellae. 
C) kelp. 
D) euglena. 
E) colloblasts.

Question 6

The unique feature(s)of a cnidarian nervous system is/are

Accepted Answer

A) vesicles with neurotransmitters located on both sides of the synapse. 
B) nerve impulses are transmitted in both directions across a network of nerves. 
C) cnidarian nerves lack any myelin surrounding the axons. 
D) All of the choices are correct 
E) None of the choices is correct 
A) vesicles with neurotransmitters located on both sides of the synapse. 
B) nerve impulses are transmitted in both directions across a network of nerves. 
C) cnidarian nerves lack any myelin surrounding the axons. 
D) All of the choices are correct 
E) None of the choices is correct

Question 7

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 is 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 is correct

Question 8

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

Accepted Answer

Food absorption in sponges differs from

Question 9

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 10

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 11

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 12

Ctenophores are propelled by eight plates bearing long,fused _____________.

Accepted Answer

The answer of Ctenophores are propelled by eight plates bearing...

Question 13

Which of the following is NOT a correct association?

Accepted Answer

A) Nematocyst-stinging organelle 
B) Operculum-lid covering the capsule containing the coiled thread 
C) Cnidoblast-a developing cnidocyte 
D) Cnidocil-poison gland 
E) Hydrostatic pressure-pressure inside capsule that forces the nematocyst out 
A) Nematocyst-stinging organelle 
B) Operculum-lid covering the capsule containing the coiled thread 
C) Cnidoblast-a developing cnidocyte 
D) Cnidocil-poison gland 
E) Hydrostatic pressure-pressure inside capsule that forces the nematocyst out

Question 14

Nematocysts are expelled when the

Accepted Answer

A) osmotic pressure reaches 140 atmospheres. 
B) hydrostatic pressure exceeds the osmotic pressure. 
C) internal hydrostatic pressure increases when water enters. 
D) cnidocil stimulates the cnidocyte to decrease hydrostatic pressure and increase osmotic pressure. 
E) None of the choices is correct 
A) osmotic pressure reaches 140 atmospheres. 
B) hydrostatic pressure exceeds the osmotic pressure. 
C) internal hydrostatic pressure increases when water enters. 
D) cnidocil stimulates the cnidocyte to decrease hydrostatic pressure and increase osmotic pressure. 
E) None of the choices is correct

Question 15

The traditional view of cnidarians relative to germ layers is that cnidaria possess

Accepted Answer

A) only one germ layer,the ectoderm,that differentiates into the two tissue layers. 
B) two germ layers,ectoderm and mesoderm. 
C) two germ layers,endoderm and mesoderm. 
D) two germ layers,ectoderm and endoderm. 
E) definitely all three germ layers including the mesoglea as it is derived from ectoderm. 
A) only one germ layer,the ectoderm,that differentiates into the two tissue layers. 
B) two germ layers,ectoderm and mesoderm. 
C) two germ layers,endoderm and mesoderm. 
D) two germ layers,ectoderm and endoderm. 
E) definitely all three germ layers including the mesoglea as it is derived from ectoderm.

Question 16

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 17

Describe the trigger mechanism and the process by which nematocysts are ejected at terrific pressure.

Accepted Answer

Nematocysts are specialized stinging org

Question 18

The small organs of equilibrium in scyphozoan jellyfishes are called ______________,and these are borne in more complex sense organs called rhopalium.

Accepted Answer

The answer of The small organs of equilibrium in scyphozoan...

Question 19

Digestion in hydra is

Accepted Answer

A) intracellular only. 
B) extracellular only. 
C) both extracellular and intracellular. 
D) neither extracellular nor intracellular. 
E) none of the choices is correct. 
A) intracellular only. 
B) extracellular only. 
C) both extracellular and intracellular. 
D) neither extracellular nor intracellular. 
E) none of the choices is correct.

Question 20

A pharynx and mesenteries are structures found in

Accepted Answer

A) hydra. 
B) sea anemones. 
C) aurelia. 
D) obelia. 
E) cubozoans. 
A) hydra. 
B) sea anemones. 
C) aurelia. 
D) obelia. 
E) cubozoans.

Exam 13: Cnidarians and Ctenophores

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

A living anemone must detect non-living debris that floats by from potential food that also move past it.How does it detect the difference?

The free-swimming __________ larva is similar to an adult ctenophore and develops directly into an adult.

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

Hermatypic corals have mutualistic algal cells in their tissues called

The unique feature(s)of a cnidarian nervous system is/are

Nematocysts are

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

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.

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

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 ___________.

Ctenophores are propelled by eight plates bearing long,fused _____________.

Which of the following is NOT a correct association?

Nematocysts are expelled when the

The traditional view of cnidarians relative to germ layers is that cnidaria possess

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

Describe the trigger mechanism and the process by which nematocysts are ejected at terrific pressure.

The small organs of equilibrium in scyphozoan jellyfishes are called ______________,and these are borne in more complex sense organs called rhopalium.

Digestion in hydra is

A pharynx and mesenteries are structures found in

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

Acoelomorpha, Platyzoa, and Mesozoa

Polyzoa and Kryptrochozoa

Molluscs

Annelids and Allied Taxa

Smaller Ecdysozoans

Trilobites, Chelicerates, and Myriapods

Crustaceans

Hexapods

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 Distribution

Animal Ecology

Filters