Question 1

The function of the siphonoglyph is

Accepted Answer

A) to pump water into the gastrovascular cavity. 
B) to sting the prey. 
C) to aid in swimming. 
D) unknown. 
A) to pump water into the gastrovascular cavity. 
B) to sting the prey. 
C) to aid in swimming. 
D) unknown.

Question 2

In Obelia,the feeding polyp is the

Accepted Answer

A) perisarc. 
B) gonangium. 
C) manubrium. 
D) hydranth. 
A) perisarc. 
B) gonangium. 
C) manubrium. 
D) hydranth.

Question 3

The freshwater Hydra has a medusa stage in its life cycle.

Accepted Answer

A) True 
 B)False

Question 4

Nematocysts are found in some cells lining the gastrovascular cavity of scyphozoans.

Accepted Answer

A) True 
 B)False

Question 5

The nematocyst is enclosed within the cell that secreted it,called a ________________.

Accepted Answer

The answer of The nematocyst is enclosed within the cell...

Question 6

Cnidarians are widespread in marine habitats,but there are a few freshwater forms.

Accepted Answer

A) True 
 B)False

Question 7

The anthozoans include the marine sea anemones and corals.

Accepted Answer

A) True 
 B)False

Question 8

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

Accepted Answer

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

Question 9

The three types of nematocysts in the Hydra are the penetrants,the glutinants,and the ___________.

Accepted Answer

The answer of The three types of nematocysts in the...

Question 10

Some fish eat cnidarians,and then use the ingested nematocysts for their own defense.

Accepted Answer

A) True 
 B)False

Question 11

The function of rhopalia is

Accepted Answer

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

Question 12

A pharynx and siphonoglyphs are structures found in

Accepted Answer

A) HydrA. 
B) sea anemones. 
C) Aurelia. 
D) Obelia. 
A) HydrA. 
B) sea anemones. 
C) Aurelia. 
D) Obelia.

Question 13

A common characteristic of cnidarians is

Accepted Answer

A) an osculum. 
B) dimorphism and often polymorphism. 
C) gills. 
D) choanocytes. 
A) an osculum. 
B) dimorphism and often polymorphism. 
C) gills. 
D) choanocytes.

Question 14

The most typical habitat of cnidarians is the shallow,warm ocean.

Accepted Answer

A) True 
 B)False

Question 15

The ciliated larva of the cnidarians is called a ________.

Accepted Answer

The answer of The ciliated larva of the cnidarians is...

Question 16

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

Accepted Answer

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

Question 17

The structure of the nervous system in cnidarians is referred to as a _________________.

Accepted Answer

The answer of The structure of the nervous system in...

Question 18

Compared to the sponges,the radial animals are much more advanced in their

Accepted Answer

A) respiratory system. 
B) excretory system. 
C) nervous system. 
D) circulatory system. 
A) respiratory system. 
B) excretory system. 
C) nervous system. 
D) circulatory system.

Question 19

Zooxanthelae

Accepted Answer

A) fix carbon dioxide and photosynthesize in a non-symbiotic relationship. 
B) recycle phosphorus and nitrogenous waste compounds. 
C) are found in river outflows with high turbidity. 
D) detract from the ability of coral to deposit calcium carbonate. 
A) fix carbon dioxide and photosynthesize in a non-symbiotic relationship. 
B) recycle phosphorus and nitrogenous waste compounds. 
C) are found in river outflows with high turbidity. 
D) detract from the ability of coral to deposit calcium carbonate.

Question 20

Nematocysts are expelled when

Accepted Answer

A) the osmotic pressure reaches 140 atmospheres. 
B) the hydrostatic pressure exceeds the osmotic pressure. 
C) the internal hydrostatic pressure increases when water enters due to osmotic pressure inside. 
D) the cnidocil stimulates the cnidocyte to decrease hydrostatic pressure and increase osmotic pressure. 
A) the osmotic pressure reaches 140 atmospheres. 
B) the hydrostatic pressure exceeds the osmotic pressure. 
C) the internal hydrostatic pressure increases when water enters due to osmotic pressure inside. 
D) the cnidocil stimulates the cnidocyte to decrease hydrostatic pressure and increase osmotic pressure.

The function of the siphonoglyph is

In Obelia,the feeding polyp is the

The freshwater Hydra has a medusa stage in its life cycle.

Nematocysts are found in some cells lining the gastrovascular cavity of scyphozoans.

The nematocyst is enclosed within the cell that secreted it,called a ________________.

Cnidarians are widespread in marine habitats,but there are a few freshwater forms.

The anthozoans include the marine sea anemones and corals.

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

The three types of nematocysts in the Hydra are the penetrants,the glutinants,and the ___________.

Some fish eat cnidarians,and then use the ingested nematocysts for their own defense.

The function of rhopalia is

A pharynx and siphonoglyphs are structures found in

A common characteristic of cnidarians is

The most typical habitat of cnidarians is the shallow,warm ocean.

The ciliated larva of the cnidarians is called a ________.

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

The structure of the nervous system in cnidarians is referred to as a _________________.

Compared to the sponges,the radial animals are much more advanced in their

Zooxanthelae

Nematocysts are expelled when

Science of Zoology and Evolution of Animal Diversity

Animal Ecology

Animal Architecture

Taxonomy and Phylogeny of Animals

Unicellular Eukaryotes

Sponges: Phylum Porifera

Acoelomorpha, Platyzoa, and Mesozoa: Flatworms, Gastrotrichs, Gnathiferans, and Mesozoans

Polyzoa and Kryptrochozoa: Cycliophora, Entoprocta, Ectoprocta, Brachiopoda, Phoronida, and Nemertea

Molluscs

Annelids and Allied Taxa

Smaller Ecdysozoans

Arthropods

Chaetognaths, Echinoderms, and Hemichordates

Vertebrate Beginnings: the Chordates

Fishes

The Early Tetrapods and Modern Amphibians

Amniote Origins and Nonavian Reptiles

Birds

Mammals

Filters

Exam 7: Cnidarians and Ctenophores

The function of the siphonoglyph is

In Obelia,the feeding polyp is the

The freshwater Hydra has a medusa stage in its life cycle.

Nematocysts are found in some cells lining the gastrovascular cavity of scyphozoans.

The nematocyst is enclosed within the cell that secreted it,called a ________________.

Cnidarians are widespread in marine habitats,but there are a few freshwater forms.

The anthozoans include the marine sea anemones and corals.

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

The three types of nematocysts in the Hydra are the penetrants,the glutinants,and the ___________.

Some fish eat cnidarians,and then use the ingested nematocysts for their own defense.

The function of rhopalia is

A pharynx and siphonoglyphs are structures found in

A common characteristic of cnidarians is

The most typical habitat of cnidarians is the shallow,warm ocean.

The ciliated larva of the cnidarians is called a ________.

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

The structure of the nervous system in cnidarians is referred to as a _________________.

Compared to the sponges,the radial animals are much more advanced in their

Zooxanthelae

Nematocysts are expelled when

Science of Zoology and Evolution of Animal Diversity

Animal Ecology

Animal Architecture

Taxonomy and Phylogeny of Animals

Unicellular Eukaryotes

Sponges: Phylum Porifera

Acoelomorpha, Platyzoa, and Mesozoa: Flatworms, Gastrotrichs, Gnathiferans, and Mesozoans

Polyzoa and Kryptrochozoa: Cycliophora, Entoprocta, Ectoprocta, Brachiopoda, Phoronida, and Nemertea

Molluscs

Annelids and Allied Taxa

Smaller Ecdysozoans

Arthropods

Chaetognaths, Echinoderms, and Hemichordates

Vertebrate Beginnings: the Chordates

Fishes

The Early Tetrapods and Modern Amphibians

Amniote Origins and Nonavian Reptiles

Birds

Mammals

Filters

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