Question 1

The only animal in which digestion occurs within cells is

Accepted Answer

A)  comb jellies.
B)  flatworms.
C)  sponges.
D)  cnidarians.E) None of the above
F) B) and C)

Question 2

The easiest method of preventing sea stars from moving is to

Accepted Answer

A)  plug their madreporite.
B)  cut off two 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 these actions would prevent a sea star from moving.F) A) and B)
G) None of the above

Question 3

Flukes are divided into the groups Monogenea and Digenea.Monogenea have a posterior holdfast with hooks,clamps,and suckers,while 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 are named for having two reproductive states in their life cycle (an adult and intramolluscan phase) . Based on this information,the blood fluke Schistosoma would be classified as

Accepted Answer

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

Question 4

Which of the following statements is NOT correct about cnidarians?

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 E)
G) B) and D)

Question 5

Describe the steps required for a sea star to move.

Accepted Answer

1.Water enters the sea star through the ...

Question 6

Which reproductive method would most likely lead to the greatest chance of success in sea stars?

Accepted Answer

A)  fragmentation
B)  sexual reproduction
C)  budding
D)  None of these methods would be successful.E) All of the above
F) C) and D)

Question 7

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) All of the above
G) B) and D)

Question 8

In deuterostomes,

Accepted Answer

A)  radial cleavage occurs,and the fate of the cells is indeterminate.
B)  spiral cleavage occurs.
C)  the fate of cells is fixed and determinate.
D)  the mouth appears at or near the blastopore.E) A) and C)
F) B) and C)

Question 9

Which of these is a bivalve?

Accepted Answer

A)  slug
B)  octopus
C)  earthworm
D)  snail
E)  oysterF) A) and B)
G) B) and D)

Question 10

Metamorphosis is a change in form and physiology that occurs during the development of an insect.

Accepted Answer

A) True 
 B)False

Question 11

Which of the following features is common among the roundworms as well as the arthropods?

Accepted Answer

A)  Periodically shed their outer covering.
B)  Radial symmetry.
C)  Endoskeleton.
D)  Undergo metamorphosis.
E)  Segmentation is readily apparent.F) All of the above
G) C) and E)

Question 12

Periodically shedding their outer covering is a feature unique to the

Accepted Answer

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

Question 13

Which of these statements is NOT correct about flatworms?

Accepted Answer

A)  The embryos of flatworms are triploblastic.
B)  Flatworms are deuterostomes.
C)  Flatworms have a sac body plan with an incomplete gut.
D)  Flatworms are free-living or parasitic.
E)  Flatworms are in phylum Platyhelminthes.F) All of the above
G) A) and B)

Question 14

A recent study of the marine hawksbill turtles' stomach contents revealed that sponges constitute a major portion of their diet.Sponge beds are generally protected from predators by their calcium and silica crystals,but these were found in the turtles' digestive systems.These protective structures are called

Accepted Answer

A)  amoebocytes.
B)  osculum.
C)  choanocytes.
D)  spicules.
E)  spongin.F) C) and E)
G) D) and E)

Question 15

Which of the listed organisms do not possess the necessary features to be classified as a member of phylum Mollusca?

Accepted Answer

A)  clams
B)  squids
C)  lobsters
D)  nautiluses
E)  snailsF) A) and B)
G) B) and D)

Question 16

Which of the following are NOT members of cnidaria?

Accepted Answer

A)  corals
B)  sponges
C)  sea anemones
D)  hydrozoa
E)  Portuguese man-of-warF) D) and E)
G) B) and C)

Question 17

Which of the following is NOT a characteristic of the sponges?

Accepted Answer

A)  If the cells of a sponge are mechanically separated,they will spontaneously reassemble into a complete and functioning sponge.
B)  Sponges have three tissue layers.
C)  Sponges have an osculum,an opening in the upper body.
D)  Sponges are filter feeders.
E)  Sponges can reproduce sexually or asexually.F) A) and E)
G) C) and E)

Question 18

Which of the following is NOT a characteristic of all animals?

Accepted Answer

A)  Animals are heterotrophic by ingestion or absorption.
B)  Animals produce gametes by meiosis.
C)  Animals digest their food internally.
D)  Animals are multicellular eukaryotes.
E)  The adult form is diploid in an alternation of generation life cycle.F) A) and B)
G) B) and E)

Question 19

Which body structure describes the freshwater hydra?

Accepted Answer

A)  a swimming medusa with the mouth pointing downward
B)  a swimming medusa with the mouth pointing upward
C)  a sessile medusa with the mouth pointing upward
D)  sessile polyp form with the mouth pointing upward
E)  a freely moving polyp with the mouth pointing upwardF) All of the above
G) B) and C)

Question 20

In ________,the mouth develops at or near the blastopore.

Accepted Answer

A)  gastrocoelomates
B)  blastocoelomates
C)  protostomes
D)  deuterostomes
E)  triploblasticsF) A) and B)
G) A) and C)

Exam 28: Invertebrate Evolution

Periodically shedding their outer covering is a feature unique to the

Correct Answer
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Which of the following statements is NOT correct about cnidarians?

Correct Answer
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Which of the listed organisms do not possess the necessary features to be classified as a member of phylum Mollusca?

Correct Answer
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Which of the following are NOT members of cnidaria?

Correct Answer
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Describe the steps required for a sea star to move.

Correct Answer
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1.Water enters the sea star through the ...
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In ________,the mouth develops at or near the blastopore.

Correct Answer
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Which statement is NOT true about echinoderms?

Correct Answer
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Which reproductive method would most likely lead to the greatest chance of success in sea stars?

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

Correct Answer
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Which of the following is NOT a characteristic of the sponges?

Correct Answer
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Which of these statements is NOT correct about flatworms?

Correct Answer
verified

Metamorphosis is a change in form and physiology that occurs during the development of an insect.

Correct Answer
verified

Which of these is a bivalve?

Correct Answer
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Which body structure describes the freshwater hydra?

Correct Answer
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In deuterostomes,

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

Correct Answer
verified

Which of the following is NOT a characteristic of all animals?

Correct Answer
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Which of the following features is common among the roundworms as well as the arthropods?

Correct Answer
verified

Exam 28: Invertebrate Evolution

Periodically shedding their outer covering is a feature unique to the

Correct AnswerverifiedShow Answer

Which of the following statements is NOT correct about cnidarians?

Correct AnswerverifiedShow Answer

Which of the listed organisms do not possess the necessary features to be classified as a member of phylum Mollusca?

Correct AnswerverifiedShow Answer

Which of the following are NOT members of cnidaria?

Correct AnswerverifiedShow Answer

Describe the steps required for a sea star to move.

Correct Answerverified1.Water enters the sea star through the ...View AnswerShow Answer

In ________,the mouth develops at or near the blastopore.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which statement is NOT true about echinoderms?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which reproductive method would most likely lead to the greatest chance of success in sea stars?

Correct AnswerverifiedShow Answer

The only animal in which digestion occurs within cells is

Correct AnswerverifiedShow Answer

Which of the following is NOT a characteristic of the sponges?

Correct AnswerverifiedShow Answer

Which of these statements is NOT correct about flatworms?

Correct AnswerverifiedShow Answer

Metamorphosis is a change in form and physiology that occurs during the development of an insect.

Correct AnswerverifiedShow Answer

Which of these is a bivalve?

Correct AnswerverifiedShow Answer

Which body structure describes the freshwater hydra?

Correct AnswerverifiedShow Answer

In deuterostomes,

Correct AnswerverifiedShow Answer

The easiest method of preventing sea stars from moving is to

Correct AnswerverifiedShow Answer

Which of the following is NOT a characteristic of all animals?

Correct AnswerverifiedShow Answer

Which of the following features is common among the roundworms as well as the arthropods?

Correct AnswerverifiedShow Answer

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1.Water enters the sea star through the ...
View Answer

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