TAMU BIOLOGY 112 EXAM #3 Questions
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latest update 2025
Select the TRUE statement about animal development:
A.) Deuterostome development is indeterminate.
B.) Mesoderm in protostomes arises as outpocketings of the primitive
gut.
C.) Radial cleavage is characteristic of protostome development.
D) In deuterostomes, the blastopore ultimately becomes the mouth of
the adult.
E) All of the above are true. --- correct answer ---Deuterostome
development is indeterminate.
,During embryogenesis of diploblastic and triploblastic animals, the
embryo becomes multilayered (i.e., the germ layers are differentiated)
through the process of:
A) enterocoely
B) cleavage
C) blastulation
D) coelom formation
E) gastrulation --- correct answer ---gastrulation
Which of the following groups is INCORRECTLY matched with a
feeding mode (i.e., mechanism of acquiring food) or structure?
A) Nemertea - retractable proboscis
B) Rotifera - ciliated crown
C) Porifera ‑ lophophores
,D) Cnidaria ‑ tentacles armed with stinging cells
E) Gastropoda ‑ radula --- correct answer ---Porifera ‑ lophophores
A triploblastic animal in which the fluid‑filled body cavity is only
partially lined (lined on one side) with mesodermal tissue is referred
to as:
A) deuterostome
B) pseudocoelomate
C) protostome
D) acoelomate
E) coelomate --- correct answer ---pseudocoelomate
Which of the following groups is INCORRECTLY matched with a
characteristic or attribute?
A) Animalia ‑ holotrophic
B) Anthophyta ‑ flowers and fruits
, C) Ctenophora - extensive cephalization
D) Cnidaria ‑ dimorphic life cycle in some species
E) Gastropoda ‑ asymmetrical growth during development results in
180o rotation of the visceral mass --- correct answer ---Ctenophora -
extensive cephalization
Animals that actively move in a unidirectional fashion through their
environment would be expected to exhibit which of the following
characteristics?
A) bilateral symmetry
B). radial symmetry
C). cephalization
D) a and c
E) b and c --- correct answer ---a and c
A lophophore is a structure used by lophophorates for
with verified correct Answers 100% Pass
latest update 2025
Select the TRUE statement about animal development:
A.) Deuterostome development is indeterminate.
B.) Mesoderm in protostomes arises as outpocketings of the primitive
gut.
C.) Radial cleavage is characteristic of protostome development.
D) In deuterostomes, the blastopore ultimately becomes the mouth of
the adult.
E) All of the above are true. --- correct answer ---Deuterostome
development is indeterminate.
,During embryogenesis of diploblastic and triploblastic animals, the
embryo becomes multilayered (i.e., the germ layers are differentiated)
through the process of:
A) enterocoely
B) cleavage
C) blastulation
D) coelom formation
E) gastrulation --- correct answer ---gastrulation
Which of the following groups is INCORRECTLY matched with a
feeding mode (i.e., mechanism of acquiring food) or structure?
A) Nemertea - retractable proboscis
B) Rotifera - ciliated crown
C) Porifera ‑ lophophores
,D) Cnidaria ‑ tentacles armed with stinging cells
E) Gastropoda ‑ radula --- correct answer ---Porifera ‑ lophophores
A triploblastic animal in which the fluid‑filled body cavity is only
partially lined (lined on one side) with mesodermal tissue is referred
to as:
A) deuterostome
B) pseudocoelomate
C) protostome
D) acoelomate
E) coelomate --- correct answer ---pseudocoelomate
Which of the following groups is INCORRECTLY matched with a
characteristic or attribute?
A) Animalia ‑ holotrophic
B) Anthophyta ‑ flowers and fruits
, C) Ctenophora - extensive cephalization
D) Cnidaria ‑ dimorphic life cycle in some species
E) Gastropoda ‑ asymmetrical growth during development results in
180o rotation of the visceral mass --- correct answer ---Ctenophora -
extensive cephalization
Animals that actively move in a unidirectional fashion through their
environment would be expected to exhibit which of the following
characteristics?
A) bilateral symmetry
B). radial symmetry
C). cephalization
D) a and c
E) b and c --- correct answer ---a and c
A lophophore is a structure used by lophophorates for
