Question 1

Which of the following statements about arthropods is FALSE ?

Accepted Answer

A)   Arthropods have a true coelom.
B)   Arthropods have an exoskeleton.
C)   Arthropods display segmentation.
D)   Arthropods have an open circulatory system.
E)   Arthropods have an incomplete digestive tract.

Question 2

The body wall of cnidarians and ctenophores consist of:

Accepted Answer

A)   three tissue layers
B)   a single epidermal layer
C)   loosely organized cells
D)   two epidermal layers with scattered mesophyll cells in between
E)   inner and outer cell layers separated by a jelly-like mesoglea

Question 3

What is the mode of nutrition for clams and oysters?

Accepted Answer

A)   autotrophy
B)   herbivores
C)   omnivores
D)   carnivores
E)   filter feeders

Question 4

Match between columns
                        Premises: roundworms

Accepted Answer

The Answer of Annelida and Rotifera and Porifera and Platyhelminthes is...

Question 5

Match between columns
                        Premises: corals

Accepted Answer

The Answer of Nematoda and Annelida and Rotifera and Cnidaria is...

Question 6

The nervous system of many species of flatworms

Accepted Answer

A)   consists of a single, large ganglion in the anterior end.
B)   is sometimes referred to as tubelike.
C)   includes two dorsal nerve cords.
D)   is diffuse and netlike.
E)   is a "ladder-type."

Question 7

Which arthropod has chelicerae, pedipalps, and silk glands?

Accepted Answer

A)   tick
B)   mite
C)   spider
D)   scorpion
E)   barnacle

Question 8

Biramous appendages in arthropods are only present in which organism?

Accepted Answer

A)   insects
B)   arachnids
C)   centipedes
D)   crustaceans
E)   horseshoe crabs

Question 9

Figure 31-1 ​

Refer to the accompanying figure. What is the structure labeled as 9?

Accepted Answer

A)   medusa
B)   planula
C)   miracidium
D)   feeding polyp
E)   polyp colony

Question 10

The first animals to show cephalization have several characteristics. Which of the following is NOT one of them?

Accepted Answer

A)   These animals were triploblastic.
B)   These animals had a proboscis.
C)   These animals were in phylum Platyhelminthes.
D)   These animals are placed in the group Lophotrochozoa.
E)   These animals followed the protostome pattern of embryonic development.

Question 11

Which is a characteristic of tapeworms?

Accepted Answer

A)   Tapeworms have a simple life cycle.
B)   Tapeworms have a complete digestive system.
C)   Tapeworms have a closed circulatory system.
D)   Tapeworms have a well developed sensory system.
E)   Tapeworms have bodies that consist of hundreds of reproductive segments.

Question 12

A polyp is a type of stinging cell.

Accepted Answer

A) True 
 B)False

Question 13

Segmentation in arthropods differs from that of annelids because arthropod segments are:

Accepted Answer

A)   smaller
B)   superficial
C)   more specialized
D)   only present in adults
E)   only present in larvae

Question 14

Most mollusks are:

Accepted Answer

A)   found in fresh water
B)   terrestrial
C)   parasitic
D)   arboreal
E)   marine

Question 15

Which of the following is a marine species that is segmented and has many setae, a well-developed head, separate sexes, and trochophore larva?

Accepted Answer

A)   sponges
B)   sandworms and tubeworms
C)   earthworms
D)   leeches
E)   mollusks

Question 16

Which class of animals has the largest number of species?

Accepted Answer

A)   Arachnida
B)   Insecta
C)   Gastropoda
D)   Bivalvia
E)   Arthropoda

Question 17

Members of phylum Ctenophora are diploblastic but lack cnidocytes. 
 
 ​

Accepted Answer

A) True 
 B)False

Question 18

Identify the distinguishing characteristics of phylum Cnidaria. Outline the classes within this phylum and their major characteristics. Include at least one representative for each class.

Accepted Answer

Members of phylum Cnidaria are character...

Question 19

Match between columns
                        Premises: leeches

Accepted Answer

The Answer of Platyhelminthes and Nematoda and Arthropoda and Nemertea is...

Question 20

What is the purpose of protonephridia in flatworms?

Accepted Answer

A)   to sense prey
B)   to exchange gas
C)   to respond to stimuli
D)   to regulate fluid balance
E)   to serve as a structure for sexual reproduction

Exam 31: Sponges, Cnidarians, Ctenophores, and Protostomes

What is the mode of nutrition for clams and oysters?

Correct Answer
verified

Identify the distinguishing characteristics of phylum Cnidaria. Outline the classes within this phylum and their major characteristics. Include at least one representative for each class.

Correct Answer
verified
Members of phylum Cnidaria are character...
View Answer

Biramous appendages in arthropods are only present in which organism?

Correct Answer
verified

The nervous system of many species of flatworms

Correct Answer
verified

Match the organism or its characteristic with the correct phylum.

Which is a characteristic of tapeworms?

Correct Answer
verified

Match the organism or its characteristic with the correct phylum.

The first animals to show cephalization have several characteristics. Which of the following is NOT one of them?

Correct Answer
verified

A polyp is a type of stinging cell.

Correct Answer
verified

The body wall of cnidarians and ctenophores consist of:

Correct Answer
verified

Segmentation in arthropods differs from that of annelids because arthropod segments are:

Correct Answer
verified

Which class of animals has the largest number of species?

Correct Answer
verified

Match the organism or its characteristic with the correct phylum.

Members of phylum Ctenophora are diploblastic but lack cnidocytes.

Correct Answer
verified

Most mollusks are:

Correct Answer
verified

Which arthropod has chelicerae, pedipalps, and silk glands?

Correct Answer
verified

Which of the following is a marine species that is segmented and has many setae, a well-developed head, separate sexes, and trochophore larva?

Correct Answer
verified

What is the purpose of protonephridia in flatworms?

Correct Answer
verified

Figure 31-1 Refer to the accompanying figure. What is the structure labeled as 9?

Correct Answer
verified

Which of the following statements about arthropods is FALSE ?

Correct Answer
verified

Exam 31: Sponges, Cnidarians, Ctenophores, and Protostomes

What is the mode of nutrition for clams and oysters?

Correct AnswerverifiedShow Answer

Identify the distinguishing characteristics of phylum Cnidaria. Outline the classes within this phylum and their major characteristics. Include at least one representative for each class.

Correct AnswerverifiedMembers of phylum Cnidaria are character...View AnswerShow Answer

Biramous appendages in arthropods are only present in which organism?

Correct AnswerverifiedShow Answer

The nervous system of many species of flatworms

Correct AnswerverifiedShow Answer

Match the organism or its characteristic with the correct phylum.

Which is a characteristic of tapeworms?

Correct AnswerverifiedShow Answer

Match the organism or its characteristic with the correct phylum.

The first animals to show cephalization have several characteristics. Which of the following is NOT one of them?

Correct AnswerverifiedShow Answer

A polyp is a type of stinging cell.

Correct AnswerverifiedShow Answer

The body wall of cnidarians and ctenophores consist of:

Correct AnswerverifiedShow Answer

Segmentation in arthropods differs from that of annelids because arthropod segments are:

Correct AnswerverifiedShow Answer

Which class of animals has the largest number of species?

Correct AnswerverifiedShow Answer

Match the organism or its characteristic with the correct phylum.

Members of phylum Ctenophora are diploblastic but lack cnidocytes. ​

Correct AnswerverifiedShow Answer

Most mollusks are:

Correct AnswerverifiedShow Answer

Which arthropod has chelicerae, pedipalps, and silk glands?

Correct AnswerverifiedShow Answer

Which of the following is a marine species that is segmented and has many setae, a well-developed head, separate sexes, and trochophore larva?

Correct AnswerverifiedShow Answer

What is the purpose of protonephridia in flatworms?

Correct AnswerverifiedShow Answer

Figure 31-1 ​ Refer to the accompanying figure. What is the structure labeled as 9?

Correct AnswerverifiedShow Answer

Which of the following statements about arthropods is FALSE ?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified
Members of phylum Cnidaria are character...
View Answer

Correct Answer
verified

Correct Answer
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Correct Answer
verified

Correct Answer
verified

Correct Answer
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Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Members of phylum Ctenophora are diploblastic but lack cnidocytes.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Figure 31-1 Refer to the accompanying figure. What is the structure labeled as 9?

Correct Answer
verified

Correct Answer
verified