Question 1

The proboscis worms belong to the phylum

Accepted Answer

A) Proboscisoidea. 
B) Nematoda. 
C) Gnathostomulida. 
D) Aspidogastrea. 
E) Nemertea. 
A) Proboscisoidea. 
B) Nematoda. 
C) Gnathostomulida. 
D) Aspidogastrea. 
E) Nemertea.

Question 2

A continuous multinucleate layer,formed by cell fusion,is called a/an

Accepted Answer

A) syncytium. 
B) glycocalyx. 
C) integument. 
D) cuticle. 
E) microvillus. 
A) syncytium. 
B) glycocalyx. 
C) integument. 
D) cuticle. 
E) microvillus.

Question 3

Relationships within the Lophotrochoza are tentative.Examine the statements below.Some statements are true and reflect our current state of knowledge,but they would not add any new information to our understanding of lophotrochozoan phylogeny.Others are hypothetical (and probably untrue),but if true they would help clarify lophotrochozoan relationships.Select all statements that would add new information and could change our perception of lophotrochozoan relationships.

Accepted Answer

A) Annelids,brachiopods and molluscs all have trochophore larval stages. 
B) The Turbellaria,Trematoda,Monogenea,and Cestodea all share a common developmental stage. 
C) "Platyzoa" is a paraphyletic grouping. 
D) New molecular analyses have shown conclusively that Rotifera and Micrognathozoa are closely related. 
A) Annelids,brachiopods and molluscs all have trochophore larval stages. 
B) The Turbellaria,Trematoda,Monogenea,and Cestodea all share a common developmental stage. 
C) "Platyzoa" is a paraphyletic grouping. 
D) New molecular analyses have shown conclusively that Rotifera and Micrognathozoa are closely related.

Question 4

The wide distribution of rotifers in lakes can be attributed to

Accepted Answer

A) resting eggs which can withstand adverse conditions. 
B) the distribution of eggs by wind. 
C) the distribution of eggs by the feet of waterfowl. 
D) ability to reproduce parthenogenetically. 
E) all of the answers are correct. 
A) resting eggs which can withstand adverse conditions. 
B) the distribution of eggs by wind. 
C) the distribution of eggs by the feet of waterfowl. 
D) ability to reproduce parthenogenetically. 
E) all of the answers are correct.

Question 5

Among those turbellarians possessing a digestive cavity,digestion is

Accepted Answer

A) extracellular only. 
B) intracellular only. 
C) accomplished before food is ingested. 
D) both extracellular and intracellular. 
E) accomplished in the pharynx. 
A) extracellular only. 
B) intracellular only. 
C) accomplished before food is ingested. 
D) both extracellular and intracellular. 
E) accomplished in the pharynx.

Question 6

Covering the tegument of acanthocephalans is a __________,consisting of mucopolysaccharides and glycoproteins.

Accepted Answer

A) glycocalyx 
B) lorica 
C) sheath 
D) cuticle 
E) pellicle 
A) glycocalyx 
B) lorica 
C) sheath 
D) cuticle 
E) pellicle

Question 7

Rotifers derive their name from a characteristic ciliated structure called the __________ located on the head.

Accepted Answer

A) mastax 
B) corolla 
C) gastrotrich 
D) corona 
E) proboscis 
A) mastax 
B) corolla 
C) gastrotrich 
D) corona 
E) proboscis

Question 8

Some rotifers have a "shell" composed of a thickened cuticle,called the __________,that functions in protection.

Accepted Answer

A) test 
B) lorica 
C) ossicles 
D) periostracum 
E) umbo 
A) test 
B) lorica 
C) ossicles 
D) periostracum 
E) umbo

Question 9

The proboscis of nemerteans is held within a sheath called the

Accepted Answer

A) rhynchocoel. 
B) gastrovascular cavity. 
C) gastrocoel. 
D) stylet. 
E) anoplan. 
A) rhynchocoel. 
B) gastrovascular cavity. 
C) gastrocoel. 
D) stylet. 
E) anoplan.

Question 10

Most turbellarian species

Accepted Answer

A) are marine scavengers. 
B) are internal parasites with complex life histories. 
C) are external parasites of birds and mammals. 
D) have complete digestive tracts. 
E) are freshwater predators and scavengers. 
A) are marine scavengers. 
B) are internal parasites with complex life histories. 
C) are external parasites of birds and mammals. 
D) have complete digestive tracts. 
E) are freshwater predators and scavengers.

Question 11

Blood flukes of the genus __________ are important human parasites.

Accepted Answer

A) Fasciola 
B) Clonorchis 
C) Opisthorchis 
D) Schistosoma 
E) Plasmodium 
A) Fasciola 
B) Clonorchis 
C) Opisthorchis 
D) Schistosoma 
E) Plasmodium

Question 12

Turbellarians glide over substrates using __________ and muscular undulations.

Accepted Answer

A) cilia 
B) parapodia 
C) pseudopodia 
D) flagella 
E) legs 
A) cilia 
B) parapodia 
C) pseudopodia 
D) flagella 
E) legs

Question 13

The most highly specialized class of parasites within phylum Platyhelminthes is

Accepted Answer

A) Aspidogastrea. 
B) Trematoda. 
C) Platyhelminthes. 
D) Monogenea. 
E) Cestoidea. 
A) Aspidogastrea. 
B) Trematoda. 
C) Platyhelminthes. 
D) Monogenea. 
E) Cestoidea.

Question 14

The holdfast structure of a tapeworm is called the

Accepted Answer

A) strobila. 
B) acetabulum. 
C) scolex. 
D) opisthaptor. 
E) proglottid. 
A) strobila. 
B) acetabulum. 
C) scolex. 
D) opisthaptor. 
E) proglottid.

Question 15

The oldest proglottids at the end of a tapeworm are filled with eggs,and are said to be

Accepted Answer

A) adult. 
B) female. 
C) pregnant. 
D) mature. 
E) gravid. 
A) adult. 
B) female. 
C) pregnant. 
D) mature. 
E) gravid.

Question 16

The rotifer pharynx contains a unique muscular structure called the __________ in which food is ground and macerated.

Accepted Answer

A) odontophore 
B) crop 
C) gizzard 
D) radula 
E) mastax 
A) odontophore 
B) crop 
C) gizzard 
D) radula 
E) mastax

Question 17

Flukes in the subclass Digenea always have two or more

Accepted Answer

A) mouths. 
B) hosts. 
C) plant hosts. 
D) intermediate hosts. 
E) definitive hosts. 
A) mouths. 
B) hosts. 
C) plant hosts. 
D) intermediate hosts. 
E) definitive hosts.

Question 18

In rotifers,two different kinds of eggs are produced.These are __________ and __________ eggs.

Accepted Answer

A) fertile; infertile 
B) mictic; amictic 
C) nucleated; unucleated 
D) large; small 
E) shelled; unshelled 
A) fertile; infertile 
B) mictic; amictic 
C) nucleated; unucleated 
D) large; small 
E) shelled; unshelled

Question 19

The haploid mictic eggs of some rotifers,if not fertilized,develop parthenogenetically into

Accepted Answer

A) dormant eggs. 
B) males. 
C) females. 
D) winter eggs. 
E) haploid larvae. 
A) dormant eggs. 
B) males. 
C) females. 
D) winter eggs. 
E) haploid larvae.

Question 20

The free-living flatworms are classified in the class

Accepted Answer

A) Cestoidea. 
B) Turbellaria. 
C) Trematoda. 
D) Triclada. 
E) Acoela. 
A) Cestoidea. 
B) Turbellaria. 
C) Trematoda. 
D) Triclada. 
E) Acoela.

Exam 10: The Smaller Lophotrochozoan Phyla

The proboscis worms belong to the phylum

A continuous multinucleate layer,formed by cell fusion,is called a/an

The wide distribution of rotifers in lakes can be attributed to

Among those turbellarians possessing a digestive cavity,digestion is

Covering the tegument of acanthocephalans is a __________,consisting of mucopolysaccharides and glycoproteins.

Rotifers derive their name from a characteristic ciliated structure called the __________ located on the head.

Some rotifers have a "shell" composed of a thickened cuticle,called the __________,that functions in protection.

The proboscis of nemerteans is held within a sheath called the

Most turbellarian species

Blood flukes of the genus __________ are important human parasites.

Turbellarians glide over substrates using __________ and muscular undulations.

The most highly specialized class of parasites within phylum Platyhelminthes is

The holdfast structure of a tapeworm is called the

The oldest proglottids at the end of a tapeworm are filled with eggs,and are said to be

The rotifer pharynx contains a unique muscular structure called the __________ in which food is ground and macerated.

Flukes in the subclass Digenea always have two or more

In rotifers,two different kinds of eggs are produced.These are __________ and __________ eggs.

The haploid mictic eggs of some rotifers,if not fertilized,develop parthenogenetically into

The free-living flatworms are classified in the class

Zoology: an Evolutionary and Ecological Perspective

Cells, tissues, organs, and Organ Systems of Animals

Cell Division and Inheritance

Evolution: History and Evidence

Evolution and Gene Frequencies

Ecology: Preserving the Animal Kingdom

Animal Taxonomy, phylogeny, and Organization

Animal-Like Protists: the Protozoa

Multicellular and Tissue Levels of Organization

Molluscan Success

Annelida: the Metameric Body Form

The Smaller Ecdysozoan Phyla

The Arthropods: Blueprint for Success

The Pancrustacea: Crustacea and Hexapoda

Ambulacraria: Echinoderms and Hemichordates

Chordata: Urochordata and Cephalochordata

The Fishes: Vertebrate Success in Water

Amphibians: the First Terrestrial Vertebrates

Reptiles: Diapsid Amniotes

Birds: Reptiles by Another Name

Mammals: Synapsid Amniotes

Protection, support, and Movement

Communication I: Nervous and Sensory Systems

Communication II: the Endocrine System and Chemical Messengers

Circulation and Gas Exchange

Nutrition and Digestion

Temperature and Body Fluid Regulation

Reproduction and Development

Filters

In rotifers,two different kinds of eggs are produced.These are and eggs.