BSC 3016 - Exam 3

Members of which groups have a lophophore with beating cilia? A. ectoprocts B. cnidarian polyps C. rotifers D. tube worms E. beardworms

ectoprocts

Which of the following scientific names is written correctly? A. Callinectes sapidus B. Callinectes Sapidus C. callinectes sapidus D. callinectes Sapidus

Callinectes sapidus

Almost all of the major animal body plans seen today appeared in the fossil record around 570 million years ago in the: A) Carboniferous period. B) Ediacaran period. C) Cambrian period. D) Permian period. E) Cretaceous period.

Cambrian period

An animal group with a trochophore larva. A) Trematoda B) Cnidaria C) Mollusca D) Crustacea E) Cestoda

Mollusca

The second most diverse phylum is the _____. A. Mollusca B. Arthropoda C. Annelida D. Platyhelminthes E. Cnidaria

Mollusca

A non-parasitic class of flatworms are the _____. A) Trematoda B) Turbellaria C) Nematoda D) Cestoda E) Oligochaeta

Turbellaria

Which of the following is NOT characteristic of protostomes? A. the embryonic blastopore becomes the mouth in the adult form B. cell cleavage in the blastula is spiral C. a coelom, if present, forms via enterocoely D. mesoderm forms at the blastopore lip E. early embryonic cell fate is determinate

a coelom, if present, forms via enterocoely

Which of the following is not a key component of the hypotetical ancestral mollusc, HAM? A) a mantle cavity B) a muscular foot C) a coiled shell D) a head with some sensory organs E) a visceral mass of true organs

a coiled shell

Which characteristic is shared by both cnidarians and flatworms? A) dorsoventrally flattened bodies B) radial symmetry C) a digestive system with a single opening D) flame cells E) both A and D

a digestive system with a single opening

Which is not a characteristic of the phylum Rotifera? A) a muscular pharyngeal mastax B) an incomplete digestive tract C) a crown of cilia at the anterior end that resembles a wheel D) parthenogenic reproduction by females producing mictic and amictic eggs E) a resistant life-cycle stage that can overwinter

an incomplete digestive tract

The typical nervous system of an annelid consists of _____. A. anterior ganglia ("brain") and a double ventral nerve cord B. a ladder-like nerve pattern C. anterior ganglia ("brain"), and dorsal & ventral nerve cords D. anterior ganglia ("brain"), dorsal nerve net, & a double ventral nerve cord E. a nerve net

anterior ganglia ("brain") and a double ventral nerve cord

Which cnidarian group has a life cycle in which medusae are entirely lacking? A. Cubozoa B. Hydrozoa C. Metazoa D. Anthozoa E. Scyphozoa

anthozoa

Which cnidarian group relies on a symbiotic relationship with photosynthetic zooxanthellae? A. Cubozoa B. Scyphozoa C. Hydrozoa D. Anthozoa (no choice "E")

anthozoa

coral

anthozoa

soft coral

anthozoa

The animal phylum with the greatest number of described species is the _____. A. Cnidaria B. Annelida C. Polychaeta D. Arthropoda E. Platyhelminthes

anthropoda

The majority of animal species are found in the phylum _____. A. Mollusca B. Cnidaria C. Annelida D. Arthropoda E. Platyhelminthes

anthropoda

Organisms that are neither coelomate nor pseudocoelomate should, apart from their digestive systems, have bodies that: A) lack true tissues. B) lack the ability to metabolize food. C) lack mesodermally derived tissues. D) are solid with tissue. E) are incapable of muscular contraction.

are solid with tissue

Most of the hydrozoans are marine animals with a prominent _____ stage followed by a ________ stage in their life cycle. A. sexual polyp; asexual medusa B. asexual polyp; sexual medusa C. sexual medusa; asexual polyp D. asexual medusa; sexual polyp E. sexual medusa; sexual polyp

asexual polyp; sexual medusa

Many parasites have an asexual stage to their life cycle because _____. A. they are too simple to reproduce just sexually B. they are poor at adapting to new host species C. their ancestors had asexual life stages and they simply retained them D. they were driven to it by their host's defenses E. asexual stages increase the chance of inhabiting a host

asexual stages increase the chance of inhabiting a host

Porifera

asymmetric & cellular level

Species that are in the same ________ are more closely related than species that are only in the same ________. A) phylum; class B) family; genus C) kingdom; phylum D) family; order E) class; order

family; order

earthworm

oligochaeta

Flame cells and tube cells are components of _____ structures called _____. A. respiratory; gills B. excretory; metanephridia C. digestive; a typhlosole D. osmoregulatory; protonephridia E. digestive; microtriches

osmoregulatory; protonephridia

porifera

parenchymula

cnidaria

planula

What is the correct sequence of stages in a generalized scyphozoan life cycle SOON AFTER fertilization occurs? A. juvenile medusae - polyp - planula B. planula - polyp - juvenile medusae C. polyp - juvenile medusae - planula D. planula - juvenile medusae - polyp E. juvenile medusae - planula - polyp

planula - polyp - juvenile medusae

Christmas-tree worm

polychaeta

marine annelid

polychaeta

If the volume of a cell increases, its surface area relative to volume will _____. A. increase to a lesser degree B. increase equally C. increase proportionally D. increase to a greater degree (no "E")

increase to a lesser degree

excretion occurs via simple diffusion without specialized cells or structures in members of all of the following except A. Porifera B. Scyphozoa C. Cubozoa D. Turbellaria E. Anthozoa

Turbellaria

Turbellarian flatworms lack _____. A. mesoderm B. a complete gut C. a coelom D. choices A and C apply E. choices B and C apply

a complete gut a coelom

Totipotent cells in an adult sponge that give rise to several other cell types are _____. A) pore cells B) zygotes C) schlerocytes D) amoebocytes E) choanocytes

amoebocytes

The structural protein that forms the basis for the spongin fibers distributed throughout the intercellular matrix of many sponges is called ____. A. collagen B. mesoglea C. mesohyle D. chitin E. spiculin

collagen

A lophophore is used by ectoprocts ___. A) at a larval stage B) as a skeletal system C) for feeding D) for locomotion E) for sensory reception.

for feeding

A major difference between tapeworms and other members of their phylum is that tapeworms _____. A. lack sex organs B. lack a gut C. lack a coelom D. lack tissues E. none of the above apply

lack a gut

People become infected with Schistosoma when ______ penetrate the skin. A. adult worms B. larval worms C. fertilized eggs D. unfertilized eggs (no "E")

larval worms

The body wall of a cnidarian consists of an outer epidermis and an inner gastrodermis with _____ between them. A. mesohyle B. mesodermis C. mesoglea D. mesocytes E. mesogel

mesoglea

Which of the following functions is an advantage of a fluid-filled body cavity? A) Organs can grow and move independently of the outer body wall. B) The cavity acts as a hydrostatic skeleton. C) Internal organs are cushioned and protected from injury. D) A and C only E) A, B, and C

organs can grow and move independently of the outer wall the cavity acts as a hydrostatic skeleton internal organs are cushioned and protected from injury

In the flatworm, flame cells are involved in what metabolic process? A. reproduction B. digestion C. sensory perception D. osmoregulation E. all of the above

osmoregulation

cnidaria

radia & tissue level

In a syconoid sponge type, choanocytes line the _____. A. spongocoel B. gastrovascular cavity C. radial canals D. osulum E. incurrent chambers

radial canals

Which two main lineages branch from the earliest Eumetazoan ancestor? A) Porifera and Bilateria B) Porifera and Cnidaria C) Radiata and Bilateria D) Radiata and Deuterostoma E) Protostomia and Bilateria

radiata and bilateria

The characteristics that generally typify most molluscs are _____. A. foot, mantle, protonephridia, shell B. radula, open circulation, mantle, shell C. coelom, mantle, closed circulation, radula D. no anus, pseudocoel, mantle, shell E. none of these

radula, open circulation, mantle, shell

Which of the following is descriptive of protostomes? A) spiral and determinate cleavage, blastopore becomes anus, enterocoelous development B) spiral and indeterminate cleavage, blastopore becomes mouth, schizocoelous development C) radial and determinate cleavage, blastopore becomes anus, enterocoelous development D) spiral and determinate cleavage, blastopore becomes mouth, schizocoelous development E) radial and determinate cleavage, blastopore becomes mouth, schizocoelous development

spiral and determination cleavage, blastopore becomes mouth, schizocoelous development

You are trying to identify an organism. It is an animal, but it does not have nerve or muscle tissue. It is neither diploblastic nor triploblastic. It is probably a A) nematode. B) flatworm. C) jelly. D) sponge. E) comb jelly.

sponge

Individual cells isolated from these animals are capable of reaggregating and forming an new individual. A) earthworms B) trematodes C) cnidarians D) flatworms E) sponges

sponges

The most ancient branch point in animal phylogeny is that between having A) a well-defined head or no head. B) a body cavity or no body cavity. C) diploblastic or triploblastic embryos. D) true tissues or no tissues. E) radial or bilateral symmetry.

true tissues or no tissues

the most ancient branch point in animal evolution is that between having _____. A) a well-defined head or no head. B) a body cavity or no body cavity. C) diploblastic or triploblastic embryos. D) true tissues or no tissues. E) radial or bilateral symmetry.

true tissues or no tissues

Bilateral symmetry is characteristic of members of the _____. A. Scyphozoa B. Hydrozoa C. Porifera D. Anthozoa E. Turbellaria

turbellaria

The most diverse animal phylum is ____ because _______. A) Porifera; it has the greatest reproductive potential per individual B) Mollusca; it has the greatest number of species on the planet C) Arthropoda; it has the greatest number of individuals on the planet D) Arthropoda; it has the greatest number of species on the planet E) Nematoda; it has the greatest number of parasites

Arthropoda; it has the greatest number of species on the planet

A diploblastic phylum of aquatic predators. A) Cnidaria B) Annelida C) Platyhelminthes D) Arthropoda E) Polychaeta

Cnidaria

A radially symmetrical animal that has two embryonic tissue layers belongs to the ____. A) Ectoprocta B) Porifera C) Cnidaria D) Platyhelminthes E) Cestoda

Cnidaria

A radially symmetrical animal that has two embryonic tissue layers belongs to which phylum? A) Echinodermata B) Porifera C) Cnidaria D) Platyhelminthes E) Nematoda

Cnidaria

The oldest and least derived ("specialized") group among the Eumetazoa is _____. A) Porifera B) Nematoda C) Annelida D) Parazoa E) Cnidaria

Cnidaria

If organisms A, B, and C belong to the same class but to different orders and if organisms D, E, and F belong to the same order but to different families, which of the following pairs of organisms would be expected to show the greatest degree of structural homology? A) B and D B) D and F C) C and F D) A and C E) A and B

D and F

Which molluscan class includes marine snails? A) Gastropoda B) Bivalvia C) Polyplacophora D) Cephalopoda E) both C and D

Gastropoda

Which molluscan class includes members that undergo embryonic torsion? A) Bivalvia B) Cephalopoda C) Gastropoda D) Polyplacophora E) All molluscan classes have this characteristic.

Gastropoda

Schizocoelous coelom formation is characteristic of ______. A. Polychaeta B. Turbellaria C. Scyphozoa D. Porifera E. Cestoda

Polychaeta

A highly polymorphic, floating, colonial hydrozoan is a(n) _____. A) planula B) Portugese man-of-war C) hydrozoan medusa D) sea anemone E) ephyra

Portuguese man-of-war

36) Which phylum is characterized by animals that have a segmented body? A) Cnidaria B) Extoprocta C) Porifera D) Rotifera E) Platyhelminthes

Rotifera

A medusa occurs for at least some part of the life cycle in the ____. A. Anthozoa and Hydrozoa B. Anthozoa only C. Scyphozoa, Hydrozoa, and Cubozoa D. Scyphozoa and Cubozoa only E. none of the above

Scyphozoa, Hydrozoa, and Cubozoa

Although a diverse group, all cnidarians are characterized by _____. A) the complete absence of asexual reproduction B) an alternation between a medusa and a polyp stage C) muscle tissue of mesodermal origin D) some degree of cephalization E) a gastrovascular cavity

a gastrovascular cavity

The nervous system in planaria is _____. A. absent B. a nerve net C. a single ventral nerve cord D. A double ventral nerve cord E. a ladder type

a ladder type

Each of the following is found in at least some members of the Cnidaria except ____. A) nematocysts B) a medusa stage C) a polyp stage D) a pseudocoelom E) a gastrovascular cavity

a pseudocoelom

Which of the following animals develops from a diploblastic embryo? A. a glass sponge B. a liver fluke C. a tapeworm D. a sea anemone E. a rotifer

a sea anemone

Mollusca

bilateral & organ level

Cephalization is primarily associated with A) method of reproduction. B) type of digestive system. C) fate of the blastopore. D) adaptation to dark environments. E) bilateral symmetry.

bilateral symmetry

Cephalization is primarily associated with _______. A) a method of reproduction. B) a type of digestive system. C) the fate of the blastopore. D) adapting to aquatic environments. E) bilateral symmetry.

bilateral symmetry

The blastopore is a structure that is evident in the A) egg and sperm. B) blastula. C) gastrula. D) eight-cell embryo. E) zygote.

blastula

The major branches of Eumetazoa are the Radiata and the Bilateria. These names refer to what characteristic of these animals? A) presence or absence of a nucleus in their cells B) body symmetry C) types of appendages D) embryonic cleavage E) size

body symmetry

the major branches of Eumetazoa are the Radiata and the Bilateral. These name refer to what characteristic of these animals? A) presence or absence of a nucleus in their cells B) body symmetry C) types of appendages D) embryonic cleavage E) size

body symmetry

An animal that is monoecious _____. A. can make only eggs B. can make eggs & sperm C. can make only sperm D. can make either eggs or sperm (no "E")

can make eggs & sperm

Which of the following is closely associated with bilateral symmetry? A. having nerves B. a closed circulatory system C. sexual reproduction D. cephalization E. being dioecious

cephalization

tapeworm

cestoda

Proglottids, a scolex, and a rostellum are characterstics of _____. A. trematodes B. cestodes C. gastrotrichs D. entoprocts E. none of the above

cestodes

A sponge's ability to feed relies most heavily on the action of _____. A. choanocytes B. spongocytes C. flame cells D. mesoglea E. pinacocytes

chanocytes

The cells of a sponge that are responsible for water flow and capture of food particles are the _____. A. archaeocytes B. mesocytes C. choanocytes D. porocytes E. amoebocytes

choanocytes

What are the cells in a sponge that are primarily responsible for trapping food particles from circulating water? A) choanocytes B) mesohyl cells C) epidermal cells D) pore cells (porocytes) E) amoebocytes

choanocytes

what are the flagellated cells in a sponge that are primarily responsible for trapping food particles from circulating water called? A) choanocytes B) mesohyl cells C) epidermal cells D) pore cells (porocytes) E) amoebocytes

choanocytes

The _____ in earthworms secretes a protective cocoon for eggs as they develop into young worms. A. rostellum B. peristomium C. pygidium D. clitellum E. prostomium

clitellum

The structure in earthworms that is responsible for secreting a mucous cocoon that encloses developing embryos is the ____. A) pseudocoel B) parapodium C) clitellum D) marsupium E) proglottidium

clitellum

An animal group with a planula larva. A) Trematoda B) Cnidaria C) Annelida D) Rotifera E) Cestoda

cnidaria

planula larva

cnidaria

Cnidarian nematocysts can be sequestered in structures called ____ by _____. A. cnidocytes tubules; octopuses B. cnidocytes; sea slugs (nudibranchs) C. cnidosacs; marine snails D. cnidocytes; marine snails E. cnidosacs; sea slugs (nudibranchs)

cnidosacs; sea slugs (nudibranchs)

Hermaphrodites _____. A) are dioecious and usually self-fertilize B) are monoecius and usually self-fertilize C) are dioecious and cross fertilize D) contain male and female sex organs but usually cross-fertilize E) both A and C

contain male and female sex organs but usually cross-fertilize

Hermaphrodites _____. A) contain male and female sex organs but usually cross-fertilize B) are dioecious and usually self-fertilize C) are monoecious and usually self-fertilize D) are dioecious and cross-fertilize E) both B and D may occur

contain male and female sex organs but usually cross-fertilize

Endosymbiotic zooxanthellae are necessary for the survival of many _____ species. A. trematode B. turbellarian C. rotifer D. hydrozoan E. coral

coral

Reproduction in the earthworm involves _____. A. asexual budding B. self-fertilization C. cross-fertilization between a male & female D. cross-fertilization between two hermaphroditic individuals E. asexual fragmentation & regeneration

cross-fertilization between two hermaphroditic individuals

Comb jellies move by the action of structures called _____. A. colloblasts B. lophophores C. statocysts D. rhopalia E. ctenes

ctenes

An animal that swims rapidly in search of prey that it captures using visual senses concentrated at its anterior end is likely to be all of the following except A) cephalized. B) diploblastic. C) coelomate. D) eumetazoan. E) bilaterally symmetrical.

diploblastic

The parthenogenetic phase of the life cycle of a rotifer produces ______ eggs by ________. A. haploid, mitosis B. haploid eggs, meiosis C. diploid, mitosis D. diploid eggs, meiosis (no "E")

diploid, mitosis

Agriculturally important as soil aerators: A) earthworms B) polychaetes C) leeches D) two of these E) all of these

earthworms

Humans become infected with blood flukes by _____. A. eating infected raw fish B. eating infected snails C. drinking water contaminated with eggs D. swimming in infected waters E. none of the above

eating infected raw fish

All of the following are all protostomes except A) echinoderms. B) segmented worms. C) spiders. D) molluscs. E) insects.

echinoderms

The larvae of many common tapeworms affecting humans are usually found _____. A) in the intestines of cows and pigs. B) encysted in the muscle of an animal such as a cow or pig. C) in the human brain. D) in the abdominal blood vessels of humans. E) encysted in human muscle.

encysted in the muscle of an animal such as a cow or pig

In cnidarians, longitudinal myofibrils are associated with the ____. A. epidermis B. gastrodermis C. mesoglea D. mesohyle E. mesodermis

epidermis

All of the following characterize tapeworms except _____. A) a scolex B) proglottids C) lack of a gut D) ectoparasitism E) absence of a coelom

extoparasitism

Asexual reproduction in animals might involve A) fission and budding. B) regeneration. C) fragmentation and mitosis. D) A and B only E) A, B, and C

fission and budding regeneration fragmentation and mitosis

In flame cells, _____. A. flagella drive fluid through a tube cell B. digestion of proteins takes place C. excretion of proteins occurs D. nematocysts are coiled up waiting to be released E. the temperature is really, really intense...

flagella drive fluid through a tube cell

A circulatory system, either open or closed, is absent in ____. A. molluscs B. flatworms C. earthworms D. polychaetes E. gastropods

flatworms

Which organism(s) has excretory structures known as protonephridia? A) sponges B) earthworms C) flatworms D) cnidaria E) all of the above

flatworms

A radula is present in members of which class of animals A) Gastropoda B) marine annelids C) flatwoms D) terrestrial anelids E) rotiers

gastropoda

Torsion in _______ caused the mantle cavity to lie above the _________. A. bivalves; anus B. gastropods; anus C. cephalopods; anus D. gastropods; head E. bivalves; head

gastropods; head

At which stage would one be able to first distinguish a diploblastic embryo from a triploblastic embryo? A) cleavage B) organogenesis C) fertilization D) gastrulation E) metamorphosis

gastrulation

at which stage would one be able to first distinguish a diploblastic embryo from a triploblastic embryo? A) cleavage B) organogenesis C) fertilization D) gastrulation E) metamorphosis

gastrulation

The mantle cavity in a mollusc houses the _____. A. foot B. radula C. gills D. gonads E. none of these

gills

Which of the following is an advantage of a complete digestive system over a gastrovascular cavity? A) Extracellular digestion is not needed. B) Extensive branching is possible. C) Intracellular digestion is easier. D) Greater specialization of regions to process food differently. E) Digestive enzymes are utilized.

greater specialization of regions to process food differently

What distinguishes a coelomate animal from a pseudocoelomate animal is that coelomates A) contain tissues derived from mesoderm, whereas pseudocoelomates have no such tissue. B) have a gut that lacks suspension within the body cavity, whereas pseudocoelomates have mesenteries that hold the digestive system in place. C) have a body cavity completely lined by mesodermal tissue, whereas pseudocoelomates do not. D) have a complete digestive system with mouth and anus, whereas pseudocoelomates have a digestive tract with only one opening. E) have a body cavity, whereas pseudocoelomates have a solid body.

have a body cavity completely lined by mesodermal tissue, whereas pseudocoelomates do not

What distinguishes a coelomate animal from a pseudocoelomate animal is that coelomates _____. A) contain tissues derived from mesoderm, whereas pseudocoelomates have no such tissue. B) have a gut that lacks suspension within the body cavity, whereas pseudocoelomates have mesenteries that hold the digestive system in place. C) have a body cavity completely lined by mesodermal tissue, whereas pseudocoelomates do not. D) have a complete digestive system with mouth and anus, whereas pseudocoelomates have a digestive tract with only one opening. E) have a body cavity, whereas pseudocoelomates have a solid body.

have a body cavity completely lined by mesodermal tissue, whereas pseudocoelomates do not.

Monoecious animals _____. A. have polymorphic reproductive zooids B. can only produce sperm C. transfer eggs to other members of their species D. have testes and ovaries E. can only reproduce asexually

have testes and ovaries

Being metameric refers to ____. A) having repeated segments B) having fused segments C) having paired protonephridia D) having a hydrostatic pseudocoleom E) having an alternation of generations life cycle

having repeated segments

Which is true of a coelom? A. it develops as a cavity within the mesoderm B. is can be filled with fluid C. it can serve as a hydrostatic skeleton D. it can house internal organs E. all of these

it develops as a cavity within the mesoderm it can be filled with fluid it can serve as a hydrostatic skeleton it can house internal organs

The correct sequence from the most to the least comprehensive of the taxonomic levels listed here is A) kingdom, phylum, order, class, family, genus, and species. B) phylum, kingdom, order, class, species, family, and genus. C) kingdom, phylum, class, order, family, genus, and species. D) family, phylum, class, kingdom, order, species, and genus. E) phylum, family, class, order, kingdom, genus, and species.

kingdom, phylum, class, order, family, genus, and species

the correct sequence from the most to the least comprehensive of the taxonomic levels listed here is A) kingdom, phylum, order, class, family, genus, and species. B) phylum, kingdom, order, class, species, family, and genus. C) kingdom, phylum, class, order, family, genus, and species. D) family, phylum, class, kingdom, order, species, and genus. E) phylum, family, class, order, kingdom, genus, and species.

kingdom, phylum, class, order, family, genus, and species

Which annelids are blood suckers: A) polychaetes B) earthworms C) leeches D) two of these E) all of these

leeches

Which sponge body plan both allowed the greatest increase in size and led to an adaptive radiation of many species? A. syconoid B. leuconoid C. osculoid D. planuloid E. asconoid

leuconoid

Which sponge canal system is most complex and makes possible the largest body size? A) syconoid B) hydroid C) asconoid D) polyploid E) leuconoid

leuconoid

Movement in annelids involves _____. A. longitudinal muscles only B. circular muscles only C. longitudinal & circular muscles D. its hydrostatic skeleton only E. arthrodial membranes & longitudinal muscles

longitudinal & circular muscles

Shell material in mollusks is secreted by tissue of the ____. A. gills B. foot C. visceral body mass D. mantle E. coelom

mantle

If gills were to be found in a mollusc, where would they be located? A) visceral mass B) coelom C) excurrent siphon D) mantle cavity E) foot

mantle cavity

"Beard" worms found at deep-sea hydrothermal vents are _____. A. marine polychaetes B. marine oligoachaetes C. free-living tunrbellarians D. molluscan sea slugs (no "E")

marine polychaetes

Which of the following is a correct statement about members of the phylum Cnidaria? They _____. A) are the simplest organisms with a complete alimentary canal (two openings) B) are primarily filter feeders C) may use a gastrovascular cavity as a hydrostatic skeleton D) are not capable of locomotion because they lack muscle cells E) have either or both of two body forms: mobile polyps and sessile medusae

may use a gastrovascular cavity as a hydrostatic skeleton

Which of the following is a correct statement about members of the phylum Cnidaria? They: A) are the simplest animals to possess a complete gut (two openings). B) are primarily filter feeders. C) may use a gastrovascular cavity as a hydrostatic skeleton. D) are not capable of locomotion because they lack true muscle tissue. E) have either or both of two body forms: mobile polyps and sessile medusae.

may use a gastrovascular cavity as a hydrostatic skeleton

Which of the following statements is TRUE? A. Members of the same class are more closely related then members in the same order. B. Members in different orders may be more closely related then members in the same family. C. Members of the same family are more closely related then members of different orders. D. Members of the same family are more closely related then members in the same genus. E. Members in different families may be more closely related then members in the same genus.

members of the same family are more closely related then members of different orders

If an animal is a pseudocoelomate, _____. A. it lacks mesoderm B. it lacks a gut cavity C. the gut cavity provides hydrostatic skeletal support D. mesoderm lines the outer edge of the blastocoel E. it has a tissue level of organization

mesoderm lines the outer edge of the blastocoel

Annelids reflect greater complexity, size, and locomotory control than nematodes because they possess ____. A. muscles B. nerve cords C. metameres D. a complete digestive system E. a cuticle

metameres

tropochophore larva

mollusca

veliger larva

mollusca

In which group is there an open circulatory system? A. flatworms B. corals C. molluscs D. earthworms E. rotifers

molluscs

A grouping of animals that includes a single common ancestor and all of its descendents is a _____ group. A. monophyletic B. polyphyletic C. paraphyletic D. homologous E. conserved

monophyletic

Which of the following is/are not associated with sponges? A) mesohyl B) osculum C) nematocysts D) spicules E) collagen

nematocysts

Organelles in cnidarian stinging cells that contain coiled, barbed threads are called _____. A. cnidocysts B. cystocysts C. nematocysts D. toxocysts E. statocysts

nematocytocysts

Compared to sponges, cnidarians are more advanced than sponges in their _____ structures. A. respiratory B. excretory C. nerve D. circulatory E. A and B apply

nerve

Which of the following is the best description of the phylum Porifera? (read chocices carefully!) A) no real symmetry, diploblastic, acontia for capturing prey B) radial symmetry, triploblastic, nematocysts C) no real symmetry, lack true tissues, sessile filter feeders D) bilateral symmetry, pseudocoel, flame bulbs for excretion E) radial symmetry, osculum, and spongocoel for filtering water

no real symmetry, lack true tissues, sessile filter feeders

Water movement through a sponge would follow what path? A) pore - spongocoel - osculum B) blastopore - gasatrovascular cavity - protostome C) choanocyte - mesohyl - spongocoel D) poroe - choanocyte - mesohyl E) collar cell - coelom - porocyte

pore - spongoecoel - osculum

Which of the following is not found in annelids? A) metameres B) a digestive system with separate mouth and anus C) a hydrostatic skeleton D) protonephridia E) a closed circulatory system

protonephridia

Which of the following is not a characteristic of most members of the phylum Annelida? A) hydrostatic skeleton B) segmentation C) metanephridia D) pseudocoelom E) closed circulatory

pseudocoelom

Several _____ groups exhibit a condition known as ____, whereby individuals of a species have a constant number of cells. A) acoelomate; amixis B) annelid; eutely C) pseudocoelomate; parthenogenesis D) pseudocoelomate; eutely E) acoelomate; eutely

pseudocoelomate; eutely

_____ are characterized by having a corona and a mastax and are _____. A. tapeworms; pseudocoelomate B. rotifers; pseudocoelomate C. tapeworms; acoelomate D. gastrotrichs; pseudocoelomate E. rotifers; acoelomate

rotifers; pseudocoelomate

Which of the following is not descriptive of a pseudocoelomate? A) a body cavity only incompletely lined with mesoderm B) bilateral symmetry C) triploblastic D) true tissues E) schizocoely

schizocoely

"true" jellyfish

schyphozoa

Corals are most closely related to which group? A) box jellies B) sea anemones C) ctenophores D) sponges E) jelly fish

sea anemones

Which of the following structures is not associated with prey capture? A) setae of earthworms B) cnidocytes of a jelly fish C) pharynx of turbellarians D) lophophore of ectoprocts E) corona of rotifers

setae of earthworms

Coiling of the _____ occurs in some _____. A. visceral mass; gastropods B. shell; gastropods C. intestine; gastropods D. shell; bivalves E. visceral mass; cephalopods

shell; gastropods

The skeletal elements of glass sponges are composed of _____. A. calcium carbonate B. silica C. collagen D. spiculin E. chitin

silica

De-torsion results in the body form seen among ____. A. snails B. slugs C. flatworms D. ectoprocts E. tube worms

slugs

Snails that have no shell are commonly known as ____. A. polychaetes B. slugs C. octopuses D. squid E. flukes

slugs

A common intermediate hosts for most flukes are _____. A. clams B. humans C. mice D. mosquitoes E. snails

snails

Which of the following is an advantage of a complete digestive system over a gastrovascular cavity? A) Extracellular digestion is not needed. B) Extensive branching is possible. C) Intracellular digestion is easier. D) Specialized regions are possible. E) Digestive enzymes can be more specific.

specialized regions are possible

Which represents the correct taxonomic hierarchy? A. species - class - genus - family - phylum - order - kingdom B. species - genus - family - order - class - phylum - kingdom C. species - family - genus - order - phylum - class - kingdom D. species - genus - order - family - class - phylum - kingdom E. species - family - genus - class - phylum - order - kingdom

species-genus-family-order-class-phylum-kingdom

Skeletal elements of various shapes and types that are found in sponges are called _____. A. trophi B. ostia C. cnidae D. setae E. spicules

spicules

Sponge species are most often identified by taxonomists by a sponge's type of _____. A. sclerocytes B. nematocysts C. gemmules D. spicules E. oscula

spicules

which of the following is descriptive of protostomes? A) spiral and determinate cleavage, blastopore becomes anus, enterocoelous development B) spiral and indeterminate cleavage, blastopore becomes mouth, schizocoelous development C) radial and determinate cleavage, blastopore becomes anus, enterocoelous development D) spiral and determinate cleavage, blastopore becomes mouth, schizocoelous development E) radial and determinate cleavage, blastopore becomes mouth, schizocoelous development

spiral and determinate cleavage, blastopore becomes mouth, schizocoelous development

A digestive system, either complete or incomplete, is absent in _____. A. tapeworms B. turbellarians C. rotifers D. ectoprocts E. flukes

tapeworms

Many animals are parasitic. Which of the following is an incorrect description of one of these parasites? (Read each choice carefully!) A) Ticks are blood-sucking parasites belonging to the Arachnida. B) Some roundworms are internal parasites of humans. C) Flukes are flatworms and may have complex life cycles. D) Tapeworms are annelids that reproduce by shedding proglottids. E) None of the above.

tapeworms are annelids that reproduce by shedding proglottids

The "cocoon" of an earthworm is produced by _____. A. the clitellum B. the prostomium C. the pygidium D. colloblast cells E. the scolex

the clitellum

Which of the following is not true of cnidarians? A) an alternation of medusa and polyp stage is common in the class Hydrozoa B) they use a ring of tentacles armed with stinging cells to capture prey C) they are triplobastic acoelomates D) they have a nerve net that coordinates contraction of microfilaments for movement E) they have a gastrovascular cavity

they are triploblastic acoelomates

Which is true of all animals? A. they have specialized types of cells B. they have tissues performing different functions C. they are heterotrophs D. both A and C E. both B and C

they have specialized types of cells they are heterotrophs

Which of the following statements about Cestoda feeding methods is false? A) They use a degenerate mouth to ingest some of their food. B) They absorb nutrients through the walls of their body. C) They lack a digestive tract. D) They are parasites. E) As adults, they live in a host's digestive tract.

they use a degenerate mouth to ingest some of their food

The Eumetazoa is defined as animals having _____. A. multiple cells B. a coelom C. organs D. a complete gut E. tissues

tissues

human blood fluke

trematoda

liver fluke

trematoda

polychaeta

trochophore

Which annelids have setae (bristles)? A) polychaetes B) earthworms C) leeches D) two of these E) all of these

two of these

The circulatory system in the earthworm _____. A. is absent B. is an open type C. has openings in blood vessels into which blood flows D. uses the dorsal blood vessel to transport blood anteriorly E. lacks capillaries

uses the dorsal blood vessel to transport blood anteriorly

mollusca

veliger & trochophore