Bio 172 UH Manoa 2025/2026 Exam
Questions with 100% Correct Answers |
1
Latest Update
Endoderm
Mesoderm
Ectoderm - 🧠 ANSWER ✔✔Three embryonic layers. Endoderm being the
inner most layer and Ectoderm being the outermost.
What traits are present in the early stages of development that would not
allow you to determine if the animal is a protostome or deuterostome?
A) Radial Cleavage
B) presence of endoderm, mesoderm, and ectoderm
c) Coelom formed by splitting the mesodermal mass
D) Anus forms from blastopore
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,E) The developmental fate of each embryonic cell is fully determined - 🧠
ANSWER ✔✔B) presence of endoderm, mesoderm, and ectoderm
2
Coelom - 🧠 ANSWER ✔✔Internal body cavity derived from the mesoderm
Blastopore - 🧠 ANSWER ✔✔The opening that develops into the mouth in
protostomes and the anus in deuterostomes
Radial Symmetry - 🧠 ANSWER ✔✔Can be split on multiple planes and be
symmetrical (Circle)
Ex. Adult Cnidaria
Bilateral symmetry - 🧠 ANSWER ✔✔Will only be symmetrical if split on one
line, all others will not be symmetrical (humans)
Ex. Nematoda
Rotational symmetry - 🧠 ANSWER ✔✔Division of the body into two halves
divides it into two copies of the same half with one rotated 180 degrees.
Ex. Ctenophora
Asymmetry - 🧠 ANSWER ✔✔No symmetry in any split
Ex. Porifera
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PRIVACY STATEMENT. ALL RIGHTS RESERVED
,Which is not a monophyletic group?
3
A) Opisthokonta
B) Bilateria
C) Cnidaria
D) Ctenophora
E) Porifera - 🧠 ANSWER ✔✔A) Opisthokonta
Which is true about animal evolutionary history?
A) the Cambrian explosion led to the appearance of the Ediacaran biota
B) the Cambrian explosion occurred around 100 MYA
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
COPYRIGHT©PROFFKERRYMARTIN 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
PRIVACY STATEMENT. ALL RIGHTS RESERVED
, E) the Cambrian explosion was caused by a rapid increase in Earth's
atmospheric nitrogen - 🧠 ANSWER ✔✔C) Several extant phyla first appear
4
in the fossil record from the Cambrian Period
Ediacaran Period - 🧠 ANSWER ✔✔before Cambrian period, about 635-543
MYA
Cambrian Explosion/Period - 🧠 ANSWER ✔✔the most rapid evolution of
new animal phyla and animal diversity in Earth's history about 542-488
MYA
Which of the following is not typical of most animals?
A) Specialized tissues
B) a stage of development called gastrulation
C) possession of hox genes
D) alternation of generations between diploid and haploid lifestages
E) food obtained via heterotrophy - 🧠 ANSWER ✔✔D) Alternation of
generations between diploid and haploid lifestages
COPYRIGHT©PROFFKERRYMARTIN 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
PRIVACY STATEMENT. ALL RIGHTS RESERVED
Questions with 100% Correct Answers |
1
Latest Update
Endoderm
Mesoderm
Ectoderm - 🧠 ANSWER ✔✔Three embryonic layers. Endoderm being the
inner most layer and Ectoderm being the outermost.
What traits are present in the early stages of development that would not
allow you to determine if the animal is a protostome or deuterostome?
A) Radial Cleavage
B) presence of endoderm, mesoderm, and ectoderm
c) Coelom formed by splitting the mesodermal mass
D) Anus forms from blastopore
COPYRIGHT©PROFFKERRYMARTIN 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
PRIVACY STATEMENT. ALL RIGHTS RESERVED
,E) The developmental fate of each embryonic cell is fully determined - 🧠
ANSWER ✔✔B) presence of endoderm, mesoderm, and ectoderm
2
Coelom - 🧠 ANSWER ✔✔Internal body cavity derived from the mesoderm
Blastopore - 🧠 ANSWER ✔✔The opening that develops into the mouth in
protostomes and the anus in deuterostomes
Radial Symmetry - 🧠 ANSWER ✔✔Can be split on multiple planes and be
symmetrical (Circle)
Ex. Adult Cnidaria
Bilateral symmetry - 🧠 ANSWER ✔✔Will only be symmetrical if split on one
line, all others will not be symmetrical (humans)
Ex. Nematoda
Rotational symmetry - 🧠 ANSWER ✔✔Division of the body into two halves
divides it into two copies of the same half with one rotated 180 degrees.
Ex. Ctenophora
Asymmetry - 🧠 ANSWER ✔✔No symmetry in any split
Ex. Porifera
COPYRIGHT©PROFFKERRYMARTIN 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
PRIVACY STATEMENT. ALL RIGHTS RESERVED
,Which is not a monophyletic group?
3
A) Opisthokonta
B) Bilateria
C) Cnidaria
D) Ctenophora
E) Porifera - 🧠 ANSWER ✔✔A) Opisthokonta
Which is true about animal evolutionary history?
A) the Cambrian explosion led to the appearance of the Ediacaran biota
B) the Cambrian explosion occurred around 100 MYA
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
COPYRIGHT©PROFFKERRYMARTIN 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
PRIVACY STATEMENT. ALL RIGHTS RESERVED
, E) the Cambrian explosion was caused by a rapid increase in Earth's
atmospheric nitrogen - 🧠 ANSWER ✔✔C) Several extant phyla first appear
4
in the fossil record from the Cambrian Period
Ediacaran Period - 🧠 ANSWER ✔✔before Cambrian period, about 635-543
MYA
Cambrian Explosion/Period - 🧠 ANSWER ✔✔the most rapid evolution of
new animal phyla and animal diversity in Earth's history about 542-488
MYA
Which of the following is not typical of most animals?
A) Specialized tissues
B) a stage of development called gastrulation
C) possession of hox genes
D) alternation of generations between diploid and haploid lifestages
E) food obtained via heterotrophy - 🧠 ANSWER ✔✔D) Alternation of
generations between diploid and haploid lifestages
COPYRIGHT©PROFFKERRYMARTIN 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
PRIVACY STATEMENT. ALL RIGHTS RESERVED
