Question 1

Which of these statements is NOT correct about the flatworms? Flatworm(s)

Accepted Answer

A)  embryos are triploblastic.
B)  are deuterostomes.
C)  have a sac body plan with an incomplete gut.
D)  are free-living or parasitic.
E)  are in Phylum Platyhelminthes.F) D) and E)
G) A) and D)

Question 2

Identify the organisms that belong to the phylum that are included in the Deuterostomia.

Accepted Answer

A)  octopuses & sea stars
B)  polychaetes and roundworms
C)  sea stars and crocodiles
D)  tapeworms and mollusks
E)  blood flukes and crustaceansF) A) and D)
G) A) and C)

Question 3

The lophotrochozoans can be divided into two groups,which include

Accepted Answer

A)  the protostomes and the deuterostomes.
B)  the comb jellies and the cnidarians.
C)  those that reproduce sexually and those that reproduce asexually.
D)  the lophophorates and the trochozoans.E) A) and C)
F) B) and D)

Question 4

Sponges feed differently than comb jellies because a sponge feeds by

Accepted Answer

A)  acting as a net in a current that sweeps food particles into its central cavity and digests them externally.
B)  squeezing the spongocoel cavity and sucking debris in and out through the osculum.
C)  the beating of collar cells' flagellae,which form a current; the current brings food particles which are engulfed and digested by collar cells.
D)  the beating collar cells form a current from osculum to pores; the food is engulfed by amoebocytes in the central cavity of the sponge.E) A) and D)
F) A) and C)

Question 5

Flukes are divided into Monogenea and Digenea.Monogenea have a posterior holdfast with hooks,clamps,and suckers; Digenea have suckers but never hooks and clamps.Monogenea have only one host in the life cycle,and usually live on gills or skin of fish and amphibians; Digenea have at least two hosts and often three or more,and are named because they have two reproductive states in their life cycle (an adult and intramolluscan phase) .From what you now know,the blood fluke Schistosoma would therefore be

Accepted Answer

A)  an endoparasite and Monogenean.
B)  an endoparasite and Digenean.
C)  an ectoparasite and Digenean.
D)  an ectoparasite and Monogenean.E) None of the above
F) All of the above

Question 6

The major insect body parts are

Accepted Answer

A)  head,cephalothorax,and abdomen.
B)  cephalothorax,midsection,and abdomen.
C)  head,thorax,and abdomen.
D)  head,prothorax,and metathorax.
E)  head,cephalothorax,and genitalia.F) C) and D)
G) C) and E)

Question 7

Which list of traits is characteristic of the ecdysozoans?

Accepted Answer

A)  Periodically shed their outer covering,non-segmented body plan and pseudocoelom on some,contain an exoskeleton and undergo metamorphosis.
B)  Periodically shed their outer covering,non-segmented body plan and contain a layer of jellylike fluid called mesoglea,contain an exoskeleton and undergo metamorphosis.
C)  Periodically shed their outer covering,segmented body plan and pseudocoelom on some,contain an endoskeleton and undergo metamorphosis.
D)  None of the these are correct.E) A) and C)
F) A) and B)

Question 8

Which of the following statements is NOT correct about cnidaria?

Accepted Answer

A)  The adult body is bilaterally symmetrical.
B)  Most are found in shallow coastal marine environments.
C)  There are two tissue layers,an outer epidermis and inner gastrodermis.
D)  Stinging cells contain a threadlike nematocyst released to capture prey.
E)  A jellylike mesoglea separates the two tissue layers.F) A) and C)
G) B) and C)

Question 9

Bilaterally symmetrical animals

Accepted Answer

A)  tend to be active and move forward.
B)  tend to exhibit cephalization.
C)  have right and left sides when cut longitudinally.
D)  All of the choices are correct.E) None of the above
F) A) and B)

Question 10

The easiest method of preventing sea stars from moving is to ____________.

Accepted Answer

A)  plug their madreporite
B)  cut off 2 of their arms
C)  squeeze the tube feet as they are extended from the body
D)  lay them on their arboreal side
E)  None of the above would prevent a sea star from moving.F) D) and E)
G) A) and C)

Question 11

A unique species of snail has been discovered in the Negev Desert.At night,these snails use a toothlike rasping organ in their head to scrape up porous limestone; they then digest the algae that lived in the rock pores.This scraping organ is the

Accepted Answer

A)  labial palp.
B)  radula.
C)  mantle.
D)  tentacle.
E)  crop.F) All of the above
G) B) and C)

Question 12

Animals are classified according to all of the following features EXCEPT

Accepted Answer

A)  presence or absence of segmentation.
B)  mode of reproduction.
C)  type of body symmetry.
D)  number of germ layers.
E)  molecular data.F) A) and C)
G) A) and B)

Question 13

Which statement concerning body symmetry is not correct?

Accepted Answer

A)  In radial symmetry,two identical halves are obtained regardless of how the animal is sliced longitudinally.
B)  The evolution of bilateral symmetry is accompanied by cephalization.
C)  Asymmetrical animals have no body shape.
D)  Bilaterally symmetric animals are usually sessile.
E)  Radial symmetry is useful because the animals can reach out in all directions.F) A) and D)
G) B) and D)

Question 14

Which statement is NOT correct about the roundworms?

Accepted Answer

A)  There are three layers of tissues in the body.
B)  Roundworms have a tube-within-a-tube body plan.
C)  There is an internal body cavity called a pseudocoelom.
D)  Roundworms have a smooth unsegmented outside body wall.
E)  Roundworms are all parasitic.F) A) and B)
G) D) and E)

Question 15

The only animal in which digestion occurs within cells is

Accepted Answer

A)  comb jellies.
B)  flatworms.
C)  sponges.
D)  cnidarians.E) B) and D)
F) B) and C)

Question 16

Periodically shedding their outer covering is a feature unique to the ________

Accepted Answer

A)  ecdysozoans.
B)  echonodermata.
C)  mollusca.
D)  lophotrochozoans.
E)  bryozoans.F) C) and E)
G) C) and D)

Question 17

A person working in a rice paddy in Asia becomes infected with the liver fluke by

Accepted Answer

A)  eating infected snails.
B)  drinking water contaminated with eggs.
C)  eating infected fish that was undercooked or raw.
D)  swimming or wading in infected water,where the cercariae enter the skin.E) A) and B)
F) A) and C)

Question 18

Which statement is NOT true about echinoderms?

Accepted Answer

A)  The exoskeleton is made of spiny plates.
B)  Gas exchange occurs through skin gills and tube feet.
C)  Larvae are free-swimming and bilaterally symmetrical.
D)  A water vascular system allows the tube feet to produce suction.
E)  Symmetry is radial in the adult,usually with parts in fives or multiples of five.F) A) and B)
G) All of the above

Question 19

Which of the following list of features describes the molluscs and bivalves but not the annelids?

Accepted Answer

A)  Lack of cephalization,contain a muscular foot and a mantle,may posses a hard outer shell and have a complete digestive system.
B)  Presence of cephalization,contain a muscular foot and a mantle,may posses a hard outer shell and have a complete digestive system.
C)  Lack of cephalization,contains circular muscles that enable them to move,may posses a hard outer shell and have a complete digestive system.
D)  Lack of cephalization,every member of the group will have a hard outer shell as well as a complete digestive system.
E)  None of these lists describes the molluscs and bivalves but not the annelids.F) C) and E)
G) C) and D)

Question 20

Which statement most accurately describes the colonial flagellate hypothesis?

Accepted Answer

A)  Animals are descended from an ancestor that resembles a spherical colony of flagellated cells.
B)  Both animals and fungi are descended from an ancestor that resembles a spherical colony of flagellated cells.
C)  All animals are descended from an ancestor that resembles a single celled organism that was a flagellated cell.
D)  None of these describe the colonial flagellate hypothesis.E) A) and D)
F) A) and B)

Exam 28: Invertebrate Evolution

Which statement is NOT true about echinoderms?

Correct Answer
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Which statement most accurately describes the colonial flagellate hypothesis?

Correct Answer
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The only animal in which digestion occurs within cells is

Correct Answer
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Periodically shedding their outer covering is a feature unique to the ________

Correct Answer
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The major insect body parts are

Correct Answer
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Identify the organisms that belong to the phylum that are included in the Deuterostomia.

Correct Answer
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A unique species of snail has been discovered in the Negev Desert.At night,these snails use a toothlike rasping organ in their head to scrape up porous limestone; they then digest the algae that lived in the rock pores.This scraping organ is the

Correct Answer
verified

Correct Answer
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Sponges feed differently than comb jellies because a sponge feeds by

Correct Answer
verified

A person working in a rice paddy in Asia becomes infected with the liver fluke by

Correct Answer
verified

Which statement concerning body symmetry is not correct?

Correct Answer
verified

Bilaterally symmetrical animals

Correct Answer
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The easiest method of preventing sea stars from moving is to ____________.

Correct Answer
verified

The lophotrochozoans can be divided into two groups,which include

Correct Answer
verified

Which of the following list of features describes the molluscs and bivalves but not the annelids?

Correct Answer
verified

Which of these statements is NOT correct about the flatworms? Flatworm(s)

Correct Answer
verified

Animals are classified according to all of the following features EXCEPT

Correct Answer
verified

Which of the following statements is NOT correct about cnidaria?

Correct Answer
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Which statement is NOT correct about the roundworms?

Correct Answer
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Which list of traits is characteristic of the ecdysozoans?

Correct Answer
verified

Exam 28: Invertebrate Evolution

Which statement is NOT true about echinoderms?

Correct AnswerverifiedShow Answer

Which statement most accurately describes the colonial flagellate hypothesis?

Correct AnswerverifiedShow Answer

The only animal in which digestion occurs within cells is

Correct AnswerverifiedShow Answer

Periodically shedding their outer covering is a feature unique to the ________

Correct AnswerverifiedShow Answer

The major insect body parts are

Correct AnswerverifiedShow Answer

Identify the organisms that belong to the phylum that are included in the Deuterostomia.

Correct AnswerverifiedShow Answer

A unique species of snail has been discovered in the Negev Desert.At night,these snails use a toothlike rasping organ in their head to scrape up porous limestone; they then digest the algae that lived in the rock pores.This scraping organ is the

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Sponges feed differently than comb jellies because a sponge feeds by

Correct AnswerverifiedShow Answer

A person working in a rice paddy in Asia becomes infected with the liver fluke by

Correct AnswerverifiedShow Answer

Which statement concerning body symmetry is not correct?

Correct AnswerverifiedShow Answer

Bilaterally symmetrical animals

Correct AnswerverifiedShow Answer

The easiest method of preventing sea stars from moving is to ____________.

Correct AnswerverifiedShow Answer

The lophotrochozoans can be divided into two groups,which include

Correct AnswerverifiedShow Answer

Which of the following list of features describes the molluscs and bivalves but not the annelids?

Correct AnswerverifiedShow Answer

Which of these statements is NOT correct about the flatworms? Flatworm(s)

Correct AnswerverifiedShow Answer

Animals are classified according to all of the following features EXCEPT

Correct AnswerverifiedShow Answer

Which of the following statements is NOT correct about cnidaria?

Correct AnswerverifiedShow Answer

Which statement is NOT correct about the roundworms?

Correct AnswerverifiedShow Answer

Which list of traits is characteristic of the ecdysozoans?

Correct AnswerverifiedShow Answer

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