Question 1

What are 2 functions of naturally produced chemical defenses in sponges?

Accepted Answer

Sponges have long been known to be relatively immune to bacterial infections. Sponges produce antimicrobial chemicals within their tissues that ward off bacteria. Other sponges use chemicals, which inhibit the settlement of larvae of other sessile animals on the sponges' tissues and may also clear a particular rock surface of encrusting algae and sessile animals.

Question 2

You are walking along the beach and see the remains of an unknown animal washed up on shore. You examine its characteristics and see that it is gelatinous, transparent, bilaterally symmetric, and lacks tentacles. You provisionally identify its phylum according to which choice?

Accepted Answer

A)   Gelatinous body rules out Cnidaria.
B)   Lack of tentacles rules out Cnidaria.
C)   Bilateral symmetry rules out Platyhelminthes.
D)   Transparent body rules out Ctenophora.E) B) and C)
F) All of the above

Question 3

Water enters the sponge spongocoel through the:

Accepted Answer

A)   choanocytes.
B)   spicules.
C)   ostia.
D)   osculum.
E)   pinocytes.F) A) and D)
G) D) and E)

Question 4

Colonial cnidarians that exhibit both the polyp stage and the medusa stage in their life cycles are:

Accepted Answer

A)   hydrozoans.
B)   scyphozoans.
C)   cubozoans.
D)   anthozoans.
E)   bryozoans.F) A) and D)
G) C) and D) A

Question 5

A flagellated cell involved in bringing water into the spongocoel of sponges is called a(n) :

Accepted Answer

A)   spicule.
B)   choanocyte.
C)   osculum.
D)   ostium.
E)   pinocyte.F) A) and E)
G) B) and C)

Question 6

True jellyfish belong to the class Scyphozoa of the phylum Cnidaria.

Accepted Answer

A) True 
 B)False  True

Question 7

The Portuguese man-o-war is a member of the class:

Accepted Answer

A)   Hydrozoa.
B)   Scyphozoa.
C)   Cubozoa.
D)   Anthozoa.
E)   Bryozoa.F) A) and B)
G) A) and C)

Question 8

MATCHING
Match the characteristic with the most closely associated animal group.
-Ctenophora

Accepted Answer

A)  bilateral symmetry
B)  many types are asymmetric
C)  radially symmetricD) All of the above
E) A) and B)

Question 9

Large sponges belonging to the class ____ are harvested for commercial use.

Accepted Answer

A)   Hexactinellida
B)   Sclerospongia
C)   Spheciospongia
D)   Demospongia
E)   CalcareaF) All of the above
G) B) and D)

Question 10

Animals with eight rows of comb plates are called:

Accepted Answer

A)   jellyfish.
B)   seastars.
C)   ctenophores.
D)   polycheates.
E)   octocorals.F) All of the above
G) A) and E)

Question 11

Colonial animals called moss animals (due to their white encrustations or fuzzy growths)  are:

Accepted Answer

A)   phoronids.
B)   bryozoans.
C)   brachiopods.
D)   anemones.
E)   hydroids.F) C) and D)
G) B) and E)

Question 12

MATCHING
Match the characteristic with the most closely associated animal group.
-Platyhelminthes

Accepted Answer

A)  bilateral symmetry
B)  many types are asymmetric
C)  radially symmetricD) None of the above
E) B) and C)

Question 13

Asexual reproduction in sponges is by binary fission.

Accepted Answer

A) True 
 B)False

Question 14

Name the three animal phyla that feed and respire with a lophophore.

Accepted Answer

Three phyla that use...

Question 15

MATCHING
Match the characteristic with the most closely associated animal group.
-Porifera

Accepted Answer

A)  bilateral symmetry
B)  many types are asymmetric
C)  radially symmetricD) A) and B)
E) A) and C)

Question 16

All of the following have bilateral symmetry except:

Accepted Answer

A)   Nemertea.
B)   Phoronids.
C)   Ctenophora.
D)   Platyhelminthes.E) A) and C)
F) A) and D)

Question 17

Match the term with its most closely associated animal group.
-Cnidarian

Accepted Answer

A)  Gastrovascular cavity
B)  Stylet
C)  SpongocoelD) All of the above
E) B) and C)

Question 18

Most species of ctenophore are:

Accepted Answer

A)   haploid.
B)   male or female only.
C)   hermaphroditic.
D)   asexual.
E)   none of the aboveF) B) and E)
G) All of the above

Question 19

Sponges feed on attached algae.

Accepted Answer

A) True 
 B)False

Question 20

The primary feeding type for lophophorates is:

Accepted Answer

A)   scavengers.
B)   attachment predators.
C)   herbivores.
D)   filter feeders.
E)   infaunal detritivores.F) B) and C)
G) A) and E)

Exam 8: Lower Invertebrates

What are 2 functions of naturally produced chemical defenses in sponges?

You are walking along the beach and see the remains of an unknown animal washed up on shore. You examine its characteristics and see that it is gelatinous, transparent, bilaterally symmetric, and lacks tentacles. You provisionally identify its phylum according to which choice?

Correct Answer
verified

Water enters the sponge spongocoel through the:

Correct Answer
verified

Colonial cnidarians that exhibit both the polyp stage and the medusa stage in their life cycles are:

Correct Answer
verified
A

A flagellated cell involved in bringing water into the spongocoel of sponges is called a(n) :

Correct Answer
verified

True jellyfish belong to the class Scyphozoa of the phylum Cnidaria.

Correct Answer
verified
True

The Portuguese man-o-war is a member of the class:

Correct Answer
verified

MATCHING Match the characteristic with the most closely associated animal group. -Ctenophora

Correct Answer
verified

Large sponges belonging to the class ____ are harvested for commercial use.

Correct Answer
verified

Animals with eight rows of comb plates are called:

Correct Answer
verified

Colonial animals called moss animals (due to their white encrustations or fuzzy growths) are:

Correct Answer
verified

MATCHING Match the characteristic with the most closely associated animal group. -Platyhelminthes

Correct Answer
verified

Asexual reproduction in sponges is by binary fission.

Correct Answer
verified

Name the three animal phyla that feed and respire with a lophophore.

Correct Answer
verified
Three phyla that use...
View Answer

MATCHING Match the characteristic with the most closely associated animal group. -Porifera

Correct Answer
verified

All of the following have bilateral symmetry except:

Correct Answer
verified

Match the term with its most closely associated animal group. -Cnidarian

Correct Answer
verified

Most species of ctenophore are:

Correct Answer
verified

Sponges feed on attached algae.

Correct Answer
verified

The primary feeding type for lophophorates is:

Correct Answer
verified

Exam 8: Lower Invertebrates

What are 2 functions of naturally produced chemical defenses in sponges?

You are walking along the beach and see the remains of an unknown animal washed up on shore. You examine its characteristics and see that it is gelatinous, transparent, bilaterally symmetric, and lacks tentacles. You provisionally identify its phylum according to which choice?

Correct AnswerverifiedShow Answer

Water enters the sponge spongocoel through the:

Correct AnswerverifiedShow Answer

Colonial cnidarians that exhibit both the polyp stage and the medusa stage in their life cycles are:

Correct AnswerverifiedA

A flagellated cell involved in bringing water into the spongocoel of sponges is called a(n) :

Correct AnswerverifiedShow Answer

True jellyfish belong to the class Scyphozoa of the phylum Cnidaria.

Correct AnswerverifiedTrue

The Portuguese man-o-war is a member of the class:

Correct AnswerverifiedShow Answer

MATCHING Match the characteristic with the most closely associated animal group. -Ctenophora

Correct AnswerverifiedShow Answer

Large sponges belonging to the class ____ are harvested for commercial use.

Correct AnswerverifiedShow Answer

Animals with eight rows of comb plates are called:

Correct AnswerverifiedShow Answer

Colonial animals called moss animals (due to their white encrustations or fuzzy growths) are:

Correct AnswerverifiedShow Answer

MATCHING Match the characteristic with the most closely associated animal group. -Platyhelminthes

Correct AnswerverifiedShow Answer

Asexual reproduction in sponges is by binary fission.

Correct AnswerverifiedShow Answer

Name the three animal phyla that feed and respire with a lophophore.

Correct AnswerverifiedThree phyla that use...View AnswerShow Answer

MATCHING Match the characteristic with the most closely associated animal group. -Porifera

Correct AnswerverifiedShow Answer

All of the following have bilateral symmetry except:

Correct AnswerverifiedShow Answer

Match the term with its most closely associated animal group. -Cnidarian

Correct AnswerverifiedShow Answer

Most species of ctenophore are:

Correct AnswerverifiedShow Answer

Sponges feed on attached algae.

Correct AnswerverifiedShow Answer

The primary feeding type for lophophorates is:

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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Correct Answer
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A

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True

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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Three phyla that use...
View Answer

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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