BIOL 1442University Of Texas - Arlington -1442 BIOL
UTA Exam 2 Questions | 2026/2027 | Answers Correct | With
Complete Solutions
_____ is a process in which certain organelles are the
descendants of prokaryotes that were engulfed, but not digested,
by ancient eukaryotic cells. Correct Answers Endosymbiosis
"Alternation of generations" describes a life cycle found in
Correct Answers all land plants
"Take the Organizer region from a chicken and graft it onto a
salamander embryo: you get a ..." Correct Answers twinned
salamander
(OpenStax Biology 2e Figure 28.4 and see also Figure 27.7)
Porifera (sponges) are considered the simplest animals because
they have no _____, but ctenophores (comb jellies) are also
considered basal because like the sponges, they have no _____.
Correct Answers true tissues from embryonic germ layers / Hox
genes
(OpenStax Biology 2e Figure 28.6)
This illustration shows the two germ layers and life stages of a
typical Correct Answers cnidarian
(OpenStax Biology 2e Figure 28.13)
Like the planarian shown above, the colorful marine worms
below are free-living members of a worm clade with three germ
layers but no body cavity. They are all Correct Answers
flatworms (Platyhelminthes).
, (OpenStax Biology 2e Figure 28.15)
Parasitic trematodes (flukes) are shown on the left, and a
parasitic cestode (tapeworm) on the right. Both of these animals
are long, flat, and flexible. They are bilaterally symmetrical and
triploblastic, but they are acoelomates. They belong to the
phylum Correct Answers Platyhelminthes.
(OpenStax Biology 2e Figure 28.18)
This illustration (of an organism much smaller than it looks)
shows the basic anatomy of a(n) Correct Answers rotifer.
(OpenStax Biology 2e Figure 28.21)
The generalized mollusk body plan shown here aligns most
closely with the subgroup called Correct Answers bivalves
(OpenStax Biology 2e Figure 28.27)
Nautilus, cuttlefish, squid and octopus belong to the _____ clade
in the phylum _____. Correct Answers cephalopod / Mollusca.
(OpenStax Biology 2e Figure 28.29 & 29.30)
The earthworm is a segmented worm with a closed circulatory
system, and its closest cousins are leeches and marine
polychaete worms. These animals have Correct Answers a true
body cavity formed within the mesoderm germ layer.
(OpenStax Biology 2e Figure 28.35)
A microscopic tardigrade ("moss piglet" or "water bear") lives in
a film of freshwater, and can survive dry spells in a desiccated
state. Tardigrades are so strange, they have an entire phylum of
their own. But like arthropods they have bilateral symmetry,
UTA Exam 2 Questions | 2026/2027 | Answers Correct | With
Complete Solutions
_____ is a process in which certain organelles are the
descendants of prokaryotes that were engulfed, but not digested,
by ancient eukaryotic cells. Correct Answers Endosymbiosis
"Alternation of generations" describes a life cycle found in
Correct Answers all land plants
"Take the Organizer region from a chicken and graft it onto a
salamander embryo: you get a ..." Correct Answers twinned
salamander
(OpenStax Biology 2e Figure 28.4 and see also Figure 27.7)
Porifera (sponges) are considered the simplest animals because
they have no _____, but ctenophores (comb jellies) are also
considered basal because like the sponges, they have no _____.
Correct Answers true tissues from embryonic germ layers / Hox
genes
(OpenStax Biology 2e Figure 28.6)
This illustration shows the two germ layers and life stages of a
typical Correct Answers cnidarian
(OpenStax Biology 2e Figure 28.13)
Like the planarian shown above, the colorful marine worms
below are free-living members of a worm clade with three germ
layers but no body cavity. They are all Correct Answers
flatworms (Platyhelminthes).
, (OpenStax Biology 2e Figure 28.15)
Parasitic trematodes (flukes) are shown on the left, and a
parasitic cestode (tapeworm) on the right. Both of these animals
are long, flat, and flexible. They are bilaterally symmetrical and
triploblastic, but they are acoelomates. They belong to the
phylum Correct Answers Platyhelminthes.
(OpenStax Biology 2e Figure 28.18)
This illustration (of an organism much smaller than it looks)
shows the basic anatomy of a(n) Correct Answers rotifer.
(OpenStax Biology 2e Figure 28.21)
The generalized mollusk body plan shown here aligns most
closely with the subgroup called Correct Answers bivalves
(OpenStax Biology 2e Figure 28.27)
Nautilus, cuttlefish, squid and octopus belong to the _____ clade
in the phylum _____. Correct Answers cephalopod / Mollusca.
(OpenStax Biology 2e Figure 28.29 & 29.30)
The earthworm is a segmented worm with a closed circulatory
system, and its closest cousins are leeches and marine
polychaete worms. These animals have Correct Answers a true
body cavity formed within the mesoderm germ layer.
(OpenStax Biology 2e Figure 28.35)
A microscopic tardigrade ("moss piglet" or "water bear") lives in
a film of freshwater, and can survive dry spells in a desiccated
state. Tardigrades are so strange, they have an entire phylum of
their own. But like arthropods they have bilateral symmetry,
