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BIO 172 UH MANOA (2025) ACTUAL EXAM
(TESTING REAL EXAM QUESTIONS) AND
VERIFIED ANSWERS (MULTIPLE
CHOICES) |COMPLETE SOLUTIONS |A+
GRADED |100% CORRECT! !!
Three embryonic layers. Endoderm being the inner most layer and
Ectoderm being the outermost.
Ans: Endoderm
Mesoderm
Ectoderm
B) presence of endoderm, mesoderm, and ectoderm
Ans: 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
E) The developmental fate of each embryonic cell is fully
determined
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Internal body cavity derived from the mesoderm
Ans: Coelom
The opening that develops into the mouth in protostomes and the
anus in deuterostomes
Ans: Blastopore
Can be split on multiple planes and be symmetrical (Circle)
Ex. Adult Cnidaria
Ans: Radial Symmetry
Will only be symmetrical if split on one line, all others will not be
symmetrical (humans)
Ex. Nematoda
Ans: Bilateral symmetry
Division of the body into two halves divides it into two copies of the
same half with one rotated 180 degrees.
Ex. Ctenophora
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Ans: Rotational symmetry
No symmetry in any split
Ex. Porifera
Ans: Asymmetry
A) Opisthokonta
Ans: Which is not a monophyletic group?
A) Opisthokonta
B) Bilateria
C) Cnidaria
D) Ctenophora
E) Porifera
C) Several extant phyla first appear in the fossil record from the
Cambrian Period
Ans: Which is true about animal evolutionary history?
A) the Cambrian explosion led to the appearance of the
Ediacaran biota
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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
E) the Cambrian explosion was caused by a rapid increase in
Earth's atmospheric nitrogen
before Cambrian period, about 635-543 MYA
Ans: Ediacaran Period
the most rapid evolution of new animal phyla and animal diversity in
Earth's history about 542-488 MYA
Ans: Cambrian Explosion/Period
D) Alternation of generations between diploid and haploid lifestages
Ans: 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
All rights reserved © 2025/ 2026 |
BIO 172 UH MANOA (2025) ACTUAL EXAM
(TESTING REAL EXAM QUESTIONS) AND
VERIFIED ANSWERS (MULTIPLE
CHOICES) |COMPLETE SOLUTIONS |A+
GRADED |100% CORRECT! !!
Three embryonic layers. Endoderm being the inner most layer and
Ectoderm being the outermost.
Ans: Endoderm
Mesoderm
Ectoderm
B) presence of endoderm, mesoderm, and ectoderm
Ans: 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
E) The developmental fate of each embryonic cell is fully
determined
All rights reserved © 2025/ 2026 |
, Page |2
Internal body cavity derived from the mesoderm
Ans: Coelom
The opening that develops into the mouth in protostomes and the
anus in deuterostomes
Ans: Blastopore
Can be split on multiple planes and be symmetrical (Circle)
Ex. Adult Cnidaria
Ans: Radial Symmetry
Will only be symmetrical if split on one line, all others will not be
symmetrical (humans)
Ex. Nematoda
Ans: Bilateral symmetry
Division of the body into two halves divides it into two copies of the
same half with one rotated 180 degrees.
Ex. Ctenophora
All rights reserved © 2025/ 2026 |
, Page |3
Ans: Rotational symmetry
No symmetry in any split
Ex. Porifera
Ans: Asymmetry
A) Opisthokonta
Ans: Which is not a monophyletic group?
A) Opisthokonta
B) Bilateria
C) Cnidaria
D) Ctenophora
E) Porifera
C) Several extant phyla first appear in the fossil record from the
Cambrian Period
Ans: Which is true about animal evolutionary history?
A) the Cambrian explosion led to the appearance of the
Ediacaran biota
All rights reserved © 2025/ 2026 |
, Page |4
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
E) the Cambrian explosion was caused by a rapid increase in
Earth's atmospheric nitrogen
before Cambrian period, about 635-543 MYA
Ans: Ediacaran Period
the most rapid evolution of new animal phyla and animal diversity in
Earth's history about 542-488 MYA
Ans: Cambrian Explosion/Period
D) Alternation of generations between diploid and haploid lifestages
Ans: 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
All rights reserved © 2025/ 2026 |
