Bio 172 UH Manoa (2025) ACTUAL EXAM (TESTING REAL EXAM
Bio 172 UH Manoa
QUESTIONS) AND VERIFIED ANSWERS (MULTIPLE CHOICES)
Study online at https://quizlet.com/_fd8t6t
1. Three embryon- Endoderm
ic layers. Endo- Mesoderm
derm being the Ectoderm
inner most lay-
er and Ectoderm
being the outer-
most.
2. B) presence What traits are present in the early stages of development that would not allow
of endoderm, you to determine if the animal is a protostome or deuterostome?
mesoderm, and
ectoderm A) Radial Cleavage
B) presence of endoderm, mesoderm, and ectoderm
c) Coelom formed by splitting the mesodermal mass
D) Anus forms from blastopore
E) The developmental fate of each embryonic cell is fully determined
3. Internal body Coelom
cavity derived
from the meso-
derm
4. The opening that Blastopore
develops into the
mouth in proto-
stomes and the
anus in deuteros-
tomes
5. Can be split on Radial Symmetry
multiple planes
and be symmetri-
cal (Circle)
, Bio 172 UH Manoa
Study online at https://quizlet.com/_fd8t6t
Ex. Adult
Cnidaria
6. Will only be sym- Bilateral symmetry
metrical if split
on one line, all
others will not be
symmetrical (hu-
mans)
Ex. Nematoda
7. Division of the Rotational symmetry
body into two
halves divides it
into two copies
of the same half
with one rotated
180 degrees.
Ex. Ctenophora
8. No symmetry in Asymmetry
any split
Ex. Porifera
9. A) Opisthokonta Which is not a monophyletic group?
A) Opisthokonta
B) Bilateria
C) Cnidaria
D) Ctenophora
E) Porifera
10.
, Bio 172 UH Manoa
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C) Several extant Which is true about animal evolutionary history?
phyla first ap-
pear in the fossil A) the Cambrian explosion led to the appearance of the Ediacaran biota
record from the B) the Cambrian explosion occurred around 100 MYA
Cambrian Period C) several extant phyla first appear in the fossil record from the Cambrian period
D) many fossils dating from the Cambrian explosion represent species that survive
today
E) the Cambrian explosion was caused by a rapid increase in Earth's atmospheric
nitrogen
11. before Cambri- Ediacaran Period
an period, about
635-543 MYA
12. the most rapid Cambrian Explosion/Period
evolution of new
animal phyla and
animal diversity
in Earth's histo-
ry about 542-488
MYA
13. D) Alternation Which of the following is not typical of most animals?
of generations
between diploid A) Specialized tissues
and haploid B) a stage of development called gastrulation
lifestages C) possession of hox genes
D) alternation of generations between diploid and haploid lifestages
E) food obtained via heterotrophy
14. Responsible for Hox Genes
the general body
, Bio 172 UH Manoa
Study online at https://quizlet.com/_fd8t6t
pattern of most
animals
15. results in the for- Gastrulation
mation of the
primitive gut
(archenteron) or
digestive cavity
and the forma-
tion of the em-
bryonic layers.
16. formation of or- Organogenesis
gans
17. E) As more DNA Which of the following is true of the animal phylogenetic tree?
is sequenced and
analyzed from A) fossils provide the best source of information for determining the animal
more animals, fu- phylogenetic tree
ture changes to B) major accepted clades of the animal phylogeny have remained constant over
major surviving the past 50 years
clades of the ani- C) Future DNA evidence is likely to demonstrate that the Bilateria is the most
mal phylogenetic primitive animal clade
tree become less D) Eumetazoans include more species than Metazoans
likely E) As more DNA is sequenced and analyzed from more animals, future changes
to major surviving clades of the animal phylogenetic tree become less likely.
18. D) it is present in Which of the following is not true of the coelom?
all animals
A) it may be present in triploblastic organisms
B) it is a cavity the houses internal organs
C) it is derived from mesoderm
Bio 172 UH Manoa
QUESTIONS) AND VERIFIED ANSWERS (MULTIPLE CHOICES)
Study online at https://quizlet.com/_fd8t6t
1. Three embryon- Endoderm
ic layers. Endo- Mesoderm
derm being the Ectoderm
inner most lay-
er and Ectoderm
being the outer-
most.
2. B) presence What traits are present in the early stages of development that would not allow
of endoderm, you to determine if the animal is a protostome or deuterostome?
mesoderm, and
ectoderm A) Radial Cleavage
B) presence of endoderm, mesoderm, and ectoderm
c) Coelom formed by splitting the mesodermal mass
D) Anus forms from blastopore
E) The developmental fate of each embryonic cell is fully determined
3. Internal body Coelom
cavity derived
from the meso-
derm
4. The opening that Blastopore
develops into the
mouth in proto-
stomes and the
anus in deuteros-
tomes
5. Can be split on Radial Symmetry
multiple planes
and be symmetri-
cal (Circle)
, Bio 172 UH Manoa
Study online at https://quizlet.com/_fd8t6t
Ex. Adult
Cnidaria
6. Will only be sym- Bilateral symmetry
metrical if split
on one line, all
others will not be
symmetrical (hu-
mans)
Ex. Nematoda
7. Division of the Rotational symmetry
body into two
halves divides it
into two copies
of the same half
with one rotated
180 degrees.
Ex. Ctenophora
8. No symmetry in Asymmetry
any split
Ex. Porifera
9. A) Opisthokonta Which is not a monophyletic group?
A) Opisthokonta
B) Bilateria
C) Cnidaria
D) Ctenophora
E) Porifera
10.
, Bio 172 UH Manoa
Study online at https://quizlet.com/_fd8t6t
C) Several extant Which is true about animal evolutionary history?
phyla first ap-
pear in the fossil A) the Cambrian explosion led to the appearance of the Ediacaran biota
record from the B) the Cambrian explosion occurred around 100 MYA
Cambrian Period C) several extant phyla first appear in the fossil record from the Cambrian period
D) many fossils dating from the Cambrian explosion represent species that survive
today
E) the Cambrian explosion was caused by a rapid increase in Earth's atmospheric
nitrogen
11. before Cambri- Ediacaran Period
an period, about
635-543 MYA
12. the most rapid Cambrian Explosion/Period
evolution of new
animal phyla and
animal diversity
in Earth's histo-
ry about 542-488
MYA
13. D) Alternation Which of the following is not typical of most animals?
of generations
between diploid A) Specialized tissues
and haploid B) a stage of development called gastrulation
lifestages C) possession of hox genes
D) alternation of generations between diploid and haploid lifestages
E) food obtained via heterotrophy
14. Responsible for Hox Genes
the general body
, Bio 172 UH Manoa
Study online at https://quizlet.com/_fd8t6t
pattern of most
animals
15. results in the for- Gastrulation
mation of the
primitive gut
(archenteron) or
digestive cavity
and the forma-
tion of the em-
bryonic layers.
16. formation of or- Organogenesis
gans
17. E) As more DNA Which of the following is true of the animal phylogenetic tree?
is sequenced and
analyzed from A) fossils provide the best source of information for determining the animal
more animals, fu- phylogenetic tree
ture changes to B) major accepted clades of the animal phylogeny have remained constant over
major surviving the past 50 years
clades of the ani- C) Future DNA evidence is likely to demonstrate that the Bilateria is the most
mal phylogenetic primitive animal clade
tree become less D) Eumetazoans include more species than Metazoans
likely E) As more DNA is sequenced and analyzed from more animals, future changes
to major surviving clades of the animal phylogenetic tree become less likely.
18. D) it is present in Which of the following is not true of the coelom?
all animals
A) it may be present in triploblastic organisms
B) it is a cavity the houses internal organs
C) it is derived from mesoderm
