Campbell Biology
8th Ed Test Bank
Chapter 32, An
Introduction to
Animal Diversity
LATEST 2025-2026
EXAM WITH
VERIFIED
SOLUTION
,Knowledge/Comprehension 5) The number
of legs an insect has, the number of
vertebrae in a vertebral column, or the
number of joints in a digit (such as a finger)
are all strongly influenced by A) haploid
genomes. B) introns within genes. C)
heterotic genes. D) heterogeneous genes.
E) Hox genes. - ANSWER-E Topic:
Concept 32.1
Application/Analysis 6) What do animals as
diverse as corals and monkeys have in
common? A)body cavity between body wall
and digestive system B) number of
embryonic tissue layers C) type of body
symmetry D) presence of Hox genes E)
degree of cephalization - ANSWER-D
Topic: Concept 32.1
Knowledge/Comprehension 7) The Hox
genes came to regulate each of the
following in what sequence, from earliest to
most recent? 1. identity and position of
,paired appendages in protostome embryos
2. formation of water channels in sponges
3. anterior-posterior orientation of segments
in protostome embryos 4. positioning of
tentacles in cnidarians 5. anterior-posterior
orientation in vertebrate embryos A) 4 1 3 2
5 B) 4 2 3 1 5 C) 4 2 5 3 1 D) 2 4 5 3 1 E) 2
4 3 1 5 - ANSWER-E Topic: Concept 32.1
Synthesis/Evaluation
8) In individual insects of some species,
whole chromosomes that carry larval genes
are eliminated from the genomes of somatic
cells at the time of metamorphosis. A
consequence of this occurrence is that A)
we could not clone a larva from the somatic
cells of such an adult insect. B) such
species must reproduce only asexually. C)
the descendents of these adults do not
include a larval stage. D) metamorphosis
can no longer occur among the
descendents of such adults. E) both C and
D. - ANSWER-A Topic: Concept 32.1
, Application/Analysis 9) The last common
ancestor of all animals was probably a A)
unicellular chytrid. B) unicellular yeast. C)
plant. D) multicellular fungus. E) flagellated
protist. - ANSWER-E Topic: Concept 32.2
Knowledge/Comprehension 10) Almost all
of the major animal body plans seen today
appeared in the fossil record over 500
million years ago at the beginning of the A)
Cambrian period. B) Ediacaran period. C)
Permian period. D) Carboniferous period.
E) Cretaceous period. - ANSWER-A Topic:
Concept 32.2
Knowledge/Comprehension 11) Evidence
of which structure or characteristic would be
most surprising to find among fossils of the
Ediacaran fauna? A) true tissues B) hard
parts C) bilateral symmetry D) cephalization
E) embryos - ANSWER-B Topic: Concept
32.2
8th Ed Test Bank
Chapter 32, An
Introduction to
Animal Diversity
LATEST 2025-2026
EXAM WITH
VERIFIED
SOLUTION
,Knowledge/Comprehension 5) The number
of legs an insect has, the number of
vertebrae in a vertebral column, or the
number of joints in a digit (such as a finger)
are all strongly influenced by A) haploid
genomes. B) introns within genes. C)
heterotic genes. D) heterogeneous genes.
E) Hox genes. - ANSWER-E Topic:
Concept 32.1
Application/Analysis 6) What do animals as
diverse as corals and monkeys have in
common? A)body cavity between body wall
and digestive system B) number of
embryonic tissue layers C) type of body
symmetry D) presence of Hox genes E)
degree of cephalization - ANSWER-D
Topic: Concept 32.1
Knowledge/Comprehension 7) The Hox
genes came to regulate each of the
following in what sequence, from earliest to
most recent? 1. identity and position of
,paired appendages in protostome embryos
2. formation of water channels in sponges
3. anterior-posterior orientation of segments
in protostome embryos 4. positioning of
tentacles in cnidarians 5. anterior-posterior
orientation in vertebrate embryos A) 4 1 3 2
5 B) 4 2 3 1 5 C) 4 2 5 3 1 D) 2 4 5 3 1 E) 2
4 3 1 5 - ANSWER-E Topic: Concept 32.1
Synthesis/Evaluation
8) In individual insects of some species,
whole chromosomes that carry larval genes
are eliminated from the genomes of somatic
cells at the time of metamorphosis. A
consequence of this occurrence is that A)
we could not clone a larva from the somatic
cells of such an adult insect. B) such
species must reproduce only asexually. C)
the descendents of these adults do not
include a larval stage. D) metamorphosis
can no longer occur among the
descendents of such adults. E) both C and
D. - ANSWER-A Topic: Concept 32.1
, Application/Analysis 9) The last common
ancestor of all animals was probably a A)
unicellular chytrid. B) unicellular yeast. C)
plant. D) multicellular fungus. E) flagellated
protist. - ANSWER-E Topic: Concept 32.2
Knowledge/Comprehension 10) Almost all
of the major animal body plans seen today
appeared in the fossil record over 500
million years ago at the beginning of the A)
Cambrian period. B) Ediacaran period. C)
Permian period. D) Carboniferous period.
E) Cretaceous period. - ANSWER-A Topic:
Concept 32.2
Knowledge/Comprehension 11) Evidence
of which structure or characteristic would be
most surprising to find among fossils of the
Ediacaran fauna? A) true tissues B) hard
parts C) bilateral symmetry D) cephalization
E) embryos - ANSWER-B Topic: Concept
32.2
