Question 1

Adult Ascaris worms are found in the host's _________________.

Accepted Answer

intestines

Question 2

In contrast to the function of our bodies,the nematode is unusual insofar as it

Accepted Answer

A)  lacks circular muscles to antagonize the longitudinal muscles and must rely on the rigid cuticle and hydrostatic pressure. 
B)  extends muscle cells to the nerve process, rather than nerves to the muscle cells. 
C)  does not utilize the Krebs cycle and electron transport chain in anaerobic parasitic species. 
D)  moves food through its alimentary tract without direct muscle contractions on the intestine. 
E)  All of the choices are "unusual" nematode adaptations. 
A)  lacks circular muscles to antagonize the longitudinal muscles and must rely on the rigid cuticle and hydrostatic pressure. 
B)  extends muscle cells to the nerve process, rather than nerves to the muscle cells. 
C)  does not utilize the Krebs cycle and electron transport chain in anaerobic parasitic species. 
D)  moves food through its alimentary tract without direct muscle contractions on the intestine. 
E)  All of the choices are "unusual" nematode adaptations. E

Question 3

The name "hookworms" is due to the fact they

Accepted Answer

A)  cluster in blood vessels in the liver and clog the veins. 
B)  burrow constantly through muscle tissues. 
C)  hook onto the intestine and consume blood and tissue fluids causing anemia. 
D)  clog the lymph glands and expand the legs and arms. 
E)  have an anterior end that curves dorsally like a hook. 
A)  cluster in blood vessels in the liver and clog the veins. 
B)  burrow constantly through muscle tissues. 
C)  hook onto the intestine and consume blood and tissue fluids causing anemia. 
D)  clog the lymph glands and expand the legs and arms. 
E)  have an anterior end that curves dorsally like a hook. E

Question 4

Nematodes have no circular muscles in the body wall; therefore,the ___________ antagonizes the longitudinal muscles.

Accepted Answer

The answer of Nematodes have no circular muscles in the...

Question 5

Kinorhynchs

Accepted Answer

A)  are relatively large (10 to 12.5 cm [4 to 5 in.]). 
B)  live in fresh water. 
C)  possess external cilia. 
D)  have a vestigial digestive system and absorbs food through its epidermis. 
E)  are marine worms. 
A)  are relatively large (10 to 12.5 cm [4 to 5 in.]). 
B)  live in fresh water. 
C)  possess external cilia. 
D)  have a vestigial digestive system and absorbs food through its epidermis. 
E)  are marine worms.

Question 6

"If all the matter in the universe except the? were swept away,our world would still be dimly recognizable,and if,as disembodied spirits,we could then investigate it,we should find its mountains,hills,vales,rivers,lakes,and oceans represented by a film of?.The location of towns would be decipherable,since for every massing of human beings there would be a corresponding massing of certain?.Trees would still stand in ghostly rows representing our streets and highways.The location of the various plants and animals would still be decipherable,and,had we sufficient knowledge,in many cases even their species could be determined by an examination of their erstwhile? parasites." The missing term in this passage is

Accepted Answer

A)  flatworms. 
B)  bacteria. 
C)  nematodes. 
D)  rotifers. 
E)  protozoans. 
A)  flatworms. 
B)  bacteria. 
C)  nematodes. 
D)  rotifers. 
E)  protozoans.

Question 7

Amphids and phasmids

Accepted Answer

A)  are two kinds of nematodes. 
B)  perform a sensory function. 
C)  are found in the intestine. 
D)  are acquired by eating uncooked beef. 
E)  are reproductive stages in nematodes. 
A)  are two kinds of nematodes. 
B)  perform a sensory function. 
C)  are found in the intestine. 
D)  are acquired by eating uncooked beef. 
E)  are reproductive stages in nematodes.

Question 8

Give the reasoning behind the more recent classification of the clades Lophotrochozoa and Ecdysozoans.

Accepted Answer

The more recent classification of the cl

Question 9

Elephantiasis is an enlargement of legs,arms,scrotum,and other tissues caused by

Accepted Answer

A)  an infection of the human coelom by Ascaris. 
B)  a large number of Trichinella worms encysting in our muscles. 
C)  contracting a disease that usually occurs in elephants. 
D)  microscopic nematodes that reproduce and clog lymph glands, causing infection and limbs to swell. 
E)  a protozoan that lives in tropical roundworms and which, when ingested by humans, causes muscles to bloat. 
A)  an infection of the human coelom by Ascaris. 
B)  a large number of Trichinella worms encysting in our muscles. 
C)  contracting a disease that usually occurs in elephants. 
D)  microscopic nematodes that reproduce and clog lymph glands, causing infection and limbs to swell. 
E)  a protozoan that lives in tropical roundworms and which, when ingested by humans, causes muscles to bloat.

Question 10

Loriciferans

Accepted Answer

A)  are tiny, about 0.10 to 0.50 mm long. 
B)  live in spaces between grains of marine gravel. 
C)  widely distributed in the world. 
D)  are dioecious. 
E)  All of the choices are correct. 
A)  are tiny, about 0.10 to 0.50 mm long. 
B)  live in spaces between grains of marine gravel. 
C)  widely distributed in the world. 
D)  are dioecious. 
E)  All of the choices are correct.

Question 11

The _______________ are burrowing marine worms with a proboscis,trunk,and usually one or two caudal appendages.

Accepted Answer

The answer of The _______________ are burrowing marine worms with...

Question 12

Infective juveniles of hookworms gain access to a host by penetration of the ____________.

Accepted Answer

The answer of Infective juveniles of hookworms gain access to...

Question 13

The infective stage of Ascaris is the _____________,which is resistant to adverse conditions.

Accepted Answer

The answer of The infective stage of Ascaris is the...

Question 14

The nematode Caenorhabditis elegans has allowed scientists to develop "fate maps" tracing cell lines back to cell origins.The trait of nematodes and some other related groups where they have a set number of cell divisions leading to the same number of body cells in an adult is called 4-12-2013

Accepted Answer

A)  anisogamy. 
B)  apoptosis. 
C)  cryptobiosis. 
D)  gastrulation. 
E)  eutely. 
A)  anisogamy. 
B)  apoptosis. 
C)  cryptobiosis. 
D)  gastrulation. 
E)  eutely.

Question 15

Filarial worms (Wuchereria and Brugia)are transmitted by _________________.

Accepted Answer

The answer of Filarial worms (Wuchereria and Brugia)are transmitted by...

Question 16

The most common helminth parasite in the United States is the _________________.

Accepted Answer

The answer of The most common helminth parasite in the...

Question 17

Members of the phylum Priapulida

Accepted Answer

A)  are metameric. 
B)  are coelomate because they have a peritoneum. 
C)  are hermaphroditic. 
D)  have a proboscis. 
E)  are active predators that pursue prey. 
A)  are metameric. 
B)  are coelomate because they have a peritoneum. 
C)  are hermaphroditic. 
D)  have a proboscis. 
E)  are active predators that pursue prey.

Question 18

Most male nematodes bear a pair of ________ ________ at their posterior end to aid in insemination of the female.

Accepted Answer

The answer of Most male nematodes bear a pair of...

Question 19

The outer body covering of a nematode is a relatively thick,noncellular cuticle,which is constructed primarily of a protein known as _______.

Accepted Answer

The answer of The outer body covering of a nematode...

Question 20

Onychophorans are also known as ___________ or walking worms.

Accepted Answer

The answer of Onychophorans are also known as ___________ or...

Exam 18: Smaller Ecdysozoans

Adult Ascaris worms are found in the host's _________________.

In contrast to the function of our bodies,the nematode is unusual insofar as it

The name "hookworms" is due to the fact they

Nematodes have no circular muscles in the body wall; therefore,the ___________ antagonizes the longitudinal muscles.

Kinorhynchs

Amphids and phasmids

Give the reasoning behind the more recent classification of the clades Lophotrochozoa and Ecdysozoans.

Elephantiasis is an enlargement of legs,arms,scrotum,and other tissues caused by

Loriciferans

The _______________ are burrowing marine worms with a proboscis,trunk,and usually one or two caudal appendages.

Infective juveniles of hookworms gain access to a host by penetration of the ____________.

The infective stage of Ascaris is the _____________,which is resistant to adverse conditions.

The nematode Caenorhabditis elegans has allowed scientists to develop "fate maps" tracing cell lines back to cell origins.The trait of nematodes and some other related groups where they have a set number of cell divisions leading to the same number of body cells in an adult is called 4-12-2013

Filarial worms (Wuchereria and Brugia)are transmitted by _________________.

The most common helminth parasite in the United States is the _________________.

Members of the phylum Priapulida

Most male nematodes bear a pair of ________ ________ at their posterior end to aid in insemination of the female.

The outer body covering of a nematode is a relatively thick,noncellular cuticle,which is constructed primarily of a protein known as _______.

Onychophorans are also known as ___________ or walking worms.

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

Radiate Animals

Acoelomorpha,Platyzoa,and Mesozoa

Polyzoa and Kryptrochozoa

Molluscs

Annelids and Allied Taxa

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

Most male nematodes bear a pair of at their posterior end to aid in insemination of the female.