age 1 of 92
UH MANOA BIO172 EXAM 2 2025/2026 COMPLETE
QUESTIONS WITH VERIFIED CORRECT SOLUTIONS ||
100% GUARANTEED PASS <LATEST VERSION>
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
,age 2 of 92
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 .......Answer.........B) presence of endoderm,
mesoderm, and ectoderm
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)
,age 3 of 92
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
Which isnot a monophyletic group?
, age 4 of 92
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
UH MANOA BIO172 EXAM 2 2025/2026 COMPLETE
QUESTIONS WITH VERIFIED CORRECT SOLUTIONS ||
100% GUARANTEED PASS <LATEST VERSION>
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
,age 2 of 92
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 .......Answer.........B) presence of endoderm,
mesoderm, and ectoderm
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)
,age 3 of 92
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
Which isnot a monophyletic group?
, age 4 of 92
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
