Question 1

Molecular data confirm that cnidarians branched off from the rest of animals before ____________ evolved.

Accepted Answer

A)  echinoderms
B)  Porifera
C)  mollusks
D)  bilaterial symmetry
E)  arthropodsF) B) and E)
G) A) and E)

Question 2

Molecular analysis suggests that the rapid diversification during the Cambrian explosion may have been due to evolution of the Hox genes.

Accepted Answer

A)  definite shape and symmetry.
B)  tissues organized into organs and organ systems.
C)  distinct embryonic layers which differentiate into adult tissues.
D)  the Hox genes.
E)  having cells organized into tissue layers.F) A) and D)
G) B) and C)

Question 3

Which of the following is not correct regarding the origin of parazoans and eumetazoans?

Accepted Answer

A)  The common ancestor was a protist.
B)  The common ancestor was a hollow spherical colony of flagellated cells.
C)  Cells within sponges resemble choanoflagellate protists.
D)  Sponges evolved independently from eumetazoans.
E)  Metazoans represent a monophyletic group.F) A) and D)
G) A) and B)

Question 4

The process in which a definite head and brain evolves is called ________.

Accepted Answer

The answer of The process in which a definite head...

Question 5

Which one of the following statements about origins of animals is false?

Accepted Answer

A)  Most taxonomists agree that the origin of the metazoans is polyphyletic.
B)  The multinucleate hypothesis states that metazoans arose from multinuclear protists.
C)  The colonial flagellate hypothesis states that metazoans arose from choanoflagellate-like protists.
D)  The polyphyletic origin hypothesis states that the sponges evolved independently from the eumetazoans.
E)  Molecular data shows that metazoans are more closely related to flagellates than to ciliates.F) A) and B)
G) All of the above

Question 6

Which one of the following terms does not apply to the phylum Chordata?

Accepted Answer

A)  Eumetazoa
B)  diploblastic
C)  bilateral symmetry
D)  deuterostome
E)  coelomateF) B) and E)
G) B) and D)

Question 7

Which one of the following features would indicate that an animal is not a protostome?

Accepted Answer

A)  bilateral symmetry
B)  open or closed circulatory system
C)  blastopore opens into the archenteron
D)  three primary tissue layers
E)  body parts arranged around a central axisF) D) and E)
G) A) and E)

Question 8

Which one of the following terms applies to the phylum Cnidaria?

Accepted Answer

A)  radial symmetry
B)  pseudocoelomate
C)  Parazoa
D)  triploblastic
E)  protostomeF) None of the above
G) A) and B)

Question 9

Of the following combination of statements about protostomes and deuterostomes,which choice is correct?

Accepted Answer

A)  Protostomes are animals in which the mouth develops from the blastopore.The anus or anal pore of protostomes develops from the second opening.Deuterostomes are animals in which the anus develops from the blastopore and the mouth develops secondarily later in their development.
B)  Protostomes are animals in which the anus develops from the blastopore.The mouth of protostomes develops from the second opening.Deuterostomes are animals in which the anus develops from the blastopore and the mouth develops secondarily later in their development.
C)  Protostomes are animals in which the mouth develops from the blastopore.The anus or anal pore of protostomes develops from the second opening.Deuterostomes are animals in which the mouth develops from the blastopore and the anus develops secondarily later in their development.
D)  Protostomes are animals in which the mouth or anus develops from the blastopore,depending on the species.Deuterostomes are animals in which the mouth and anus develops from the blastopore,depending on the species.E) B) and D)
F) All of the above

Question 10

In animals that display indeterminate development

Accepted Answer

A)  embryonic cells have a predetermined fate.
B)  bilateral symmetry cannot develop.
C)  early embryonic cells,if separated from the embryo,can develop into complete organisms.
D)  embryonic cells show spiral cleavage.
E)  the blastopore develops into the mouth.F) C) and E)
G) B) and C)

Question 11

In all deuterostomes,by contrast,the cells divide parallel to and at right angles to the polar axis.This pattern is called radial cleavage.

Accepted Answer

The answer of In all deuterostomes,by contrast,the cells divide parallel...

Question 12

Which of the following terms is mismatched with its meaning or characteristics?

Accepted Answer

A)  diploblastic-ectoderm and mesoderm
B)  triploblastic-ectoderm,mesoderm,and endoderm
C)  Parazoa-lacks symmetry;no tissues
D)  Eumetazoa-definite symmetry;tissues organized
E)  Chordate-animal with notochordF) None of the above
G) All of the above

Question 13

A zoologist studies an animal that is a deuterostome.Which of the choices makes the sentence that follows incorrect? You know that deuterostomes

Accepted Answer

A)  are bilateral symmetrical.
B)  evolved from protostomes.
C)  are animals in which the blastopore develops into the mouth.
D)  are animals in which any cell can develop into a complete organism.
E)  are coelomates.F) A) and D)
G) B) and C)

Question 14

Which one of the following terms does not apply to the phylum Nematoda?

Accepted Answer

A)  asymmetry
B)  protostome
C)  coelomate
D)  triploblastic
E)  determinate cleavageF) A) and B)
G) D) and E)

Question 15

In which phylum of marine animals did symmetrical body plans first evolve?

Accepted Answer

A)  Radiata
B)  Ctenophora
C)  Cnidaria
D)  Echinodermata
E)  ParazoaF) A) and E)
G) B) and D)

Question 16

Circulatory systems solved the problem of _____ in animals with coeloms.

Accepted Answer

A)  the shorter length of digestive tracts
B)  the barrier to diffusion created by tissue surrounding the gut
C)  living in a terrestrial habitat
D)  complexity of movement
E)  decrease in oxygen levelsF) All of the above
G) A) and B)

Question 17

Select the following phylum that includes deuterostome animals that are exclusively marine and have radial symmetry as adults.

Accepted Answer

A)  Porifera
B)  Rotifera
C)  Echinodermata
D)  Chordata
E)  CnidariaF) A) and E)
G) A) and B)

Question 18

Which one of the following terms applies to the phylum Platyhelminthes?

Accepted Answer

A)  spiral cleavage
B)  protostome
C)  diploblastic
D)  acoelomate
E)  radial symmetryF) All of the above
G) A) and B)

Question 19

Animals are multicellular heterotrophs and obtain their food by ________.

Accepted Answer

The answer of Animals are multicellular heterotrophs and obtain their...

Question 20

A biologist discovered a new animal.Upon studying embryonic development,she observed radial cleavage with the blastopore developing into an anus.This animal was categorized as a

Accepted Answer

A)  parazoan.
B)  radiata.
C)  deuterstome.
D)  protostome.
E)  pseudocoelomatE.F) A) and C)
G) B) and C)

Exam 32: Overview of Animal Diversity

Select the following phylum that includes deuterostome animals that are exclusively marine and have radial symmetry as adults.

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Animals are multicellular heterotrophs and obtain their food by ________.

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Which one of the following terms applies to the phylum Platyhelminthes?

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Which one of the following statements about origins of animals is false?

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Which one of the following terms does not apply to the phylum Chordata?

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Which one of the following terms does not apply to the phylum Nematoda?

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A zoologist studies an animal that is a deuterostome.Which of the choices makes the sentence that follows incorrect? You know that deuterostomes

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Which of the following terms is mismatched with its meaning or characteristics?

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Circulatory systems solved the problem of _____ in animals with coeloms.

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In animals that display indeterminate development

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Which one of the following features would indicate that an animal is not a protostome?

Correct AnswerverifiedShow Answer

In all deuterostomes,by contrast,the cells divide parallel to and at right angles to the polar axis.This pattern is called radial cleavage.

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A biologist discovered a new animal.Upon studying embryonic development,she observed radial cleavage with the blastopore developing into an anus.This animal was categorized as a

Correct AnswerverifiedShow Answer

Molecular analysis suggests that the rapid diversification during the Cambrian explosion may have been due to evolution of the Hox genes.

Correct AnswerverifiedShow Answer

The process in which a definite head and brain evolves is called ________.

Correct AnswerverifiedShow Answer

In which phylum of marine animals did symmetrical body plans first evolve?

Correct AnswerverifiedShow Answer

Which of the following is not correct regarding the origin of parazoans and eumetazoans?

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Which one of the following terms applies to the phylum Cnidaria?

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Of the following combination of statements about protostomes and deuterostomes,which choice is correct?

Correct AnswerverifiedShow Answer

Molecular data confirm that cnidarians branched off from the rest of animals before ____________ evolved.

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