BIO 182 EXAM 3 ACTUAL Exam
Questions and CORRECT Answers
Animals are distinguished from other groups of eukaryotic organisms in that they? (Select all
that apply.)
-produce collagen.
-are multicellular heterotrophs lacking cell walls.
-have embryos that include a gastrula stage.
-are mobile. - CORRECT ANSWER - -produce collagen.
=are multicellular heterotrophs lacking cell walls.
-have embryos that include a gastrula stage.
Vertebrates are distinguished from other chordates by: (Select all that apply.)
-paired appendages in all vertebrates.
-well-developed vertebrae in all vertebrates.
-a jaw in all vertebrates.
-a mineralized skeleton made of calcium phosphate in all vertebrates.
-a protective cranium in all vertebrates. - CORRECT ANSWER - -well-developed
vertebrae in all vertebrates.
-a protective cranium in all vertebrates.
Correctly match each group of mollusks with the descriptions below. The mollusk groups may
be used once, more than once or not at all.
a.gastropods
b.cephalopods
c.bivalves
,1. snails and slugs
2. obtain food by filtering particles from seawater using siphons
3. are able to learn visual patterns and solve puzzles
4. most of the 80,000 described species of mollusks fall into this one group - CORRECT
ANSWER - 1.a
2.c
3.b
4.a
Approximately 40% of living ferns are tropical epiphytes, a fact that supports the hypothesis
that: - CORRECT ANSWER - the origin and eventual domination of angiosperms in
tropical forests both displaced and created new opportunities for other plant lineages.
The Chelicerates: (Select all that apply.)
-were among the first animals to invade land more than 400 million years ago.
-have pincer-like claws, antennae, and wings.
-are ecologically diverse, particularly in their food habits, with different groups specializing on a
wide variety of plant and animal foods.
-are known for their venoms.
-include spiders, scorpions, and their relatives. - CORRECT ANSWER - -were among the
first animals to invade land more than 400 million years ago.
-are known for their venoms.
-include spiders, scorpions, and their relatives.
Many biologists were surprised by molecular data supporting the hypothesis that ctenophores are
the sister group to all other animals. What anatomical and morphological features of ctenophores
are conventionally thought to support a close relationship with bilaterian animals? (Select all that
apply.)
-the presence of gelatinous material in the interior of the ctenophore body
, -the presence of an outer epithelium
-the presence of what many take to be a rudimentary mesoderm
-the rudimentary flow through gut - CORRECT ANSWER - -the presence of what many
take to be a rudimentary mesoderm
-the rudimentary flow through gut
Many dinosaur movies depict huge tree-sized plants with woody trunks. To what group would
these trees most likely have belonged? - CORRECT ANSWER - cycads
A botanist discovers a new seed-forming plant. She notices that this plant lacks a vascular
cambium and appears to continuously form new roots along its stem. What would be the MOST
likely placement of this plant? (Select all that apply.)
-among conifers
-among monocots
-among eudicots
-among cycads
-among angiosperms - CORRECT ANSWER - -among monocots
-among angiosperms
The gymnosperm gnetophytes are known to have diversified alongside early angiosperms in
Cretaceous tropical forests. The presence of what general features may account for the fact that
tropical forests are dominated (in terms of both ecological importance and diversity) by eudicots
and monocots and not gnetophytes today? (Select all that apply.)
-xylem with vessels
-herbaceous growth forms
-double fertilization
-reduced apical dominance
-tightly coevolved reproductive structures and animal pollinators - CORRECT ANSWER -
-herbaceous growth forms
Questions and CORRECT Answers
Animals are distinguished from other groups of eukaryotic organisms in that they? (Select all
that apply.)
-produce collagen.
-are multicellular heterotrophs lacking cell walls.
-have embryos that include a gastrula stage.
-are mobile. - CORRECT ANSWER - -produce collagen.
=are multicellular heterotrophs lacking cell walls.
-have embryos that include a gastrula stage.
Vertebrates are distinguished from other chordates by: (Select all that apply.)
-paired appendages in all vertebrates.
-well-developed vertebrae in all vertebrates.
-a jaw in all vertebrates.
-a mineralized skeleton made of calcium phosphate in all vertebrates.
-a protective cranium in all vertebrates. - CORRECT ANSWER - -well-developed
vertebrae in all vertebrates.
-a protective cranium in all vertebrates.
Correctly match each group of mollusks with the descriptions below. The mollusk groups may
be used once, more than once or not at all.
a.gastropods
b.cephalopods
c.bivalves
,1. snails and slugs
2. obtain food by filtering particles from seawater using siphons
3. are able to learn visual patterns and solve puzzles
4. most of the 80,000 described species of mollusks fall into this one group - CORRECT
ANSWER - 1.a
2.c
3.b
4.a
Approximately 40% of living ferns are tropical epiphytes, a fact that supports the hypothesis
that: - CORRECT ANSWER - the origin and eventual domination of angiosperms in
tropical forests both displaced and created new opportunities for other plant lineages.
The Chelicerates: (Select all that apply.)
-were among the first animals to invade land more than 400 million years ago.
-have pincer-like claws, antennae, and wings.
-are ecologically diverse, particularly in their food habits, with different groups specializing on a
wide variety of plant and animal foods.
-are known for their venoms.
-include spiders, scorpions, and their relatives. - CORRECT ANSWER - -were among the
first animals to invade land more than 400 million years ago.
-are known for their venoms.
-include spiders, scorpions, and their relatives.
Many biologists were surprised by molecular data supporting the hypothesis that ctenophores are
the sister group to all other animals. What anatomical and morphological features of ctenophores
are conventionally thought to support a close relationship with bilaterian animals? (Select all that
apply.)
-the presence of gelatinous material in the interior of the ctenophore body
, -the presence of an outer epithelium
-the presence of what many take to be a rudimentary mesoderm
-the rudimentary flow through gut - CORRECT ANSWER - -the presence of what many
take to be a rudimentary mesoderm
-the rudimentary flow through gut
Many dinosaur movies depict huge tree-sized plants with woody trunks. To what group would
these trees most likely have belonged? - CORRECT ANSWER - cycads
A botanist discovers a new seed-forming plant. She notices that this plant lacks a vascular
cambium and appears to continuously form new roots along its stem. What would be the MOST
likely placement of this plant? (Select all that apply.)
-among conifers
-among monocots
-among eudicots
-among cycads
-among angiosperms - CORRECT ANSWER - -among monocots
-among angiosperms
The gymnosperm gnetophytes are known to have diversified alongside early angiosperms in
Cretaceous tropical forests. The presence of what general features may account for the fact that
tropical forests are dominated (in terms of both ecological importance and diversity) by eudicots
and monocots and not gnetophytes today? (Select all that apply.)
-xylem with vessels
-herbaceous growth forms
-double fertilization
-reduced apical dominance
-tightly coevolved reproductive structures and animal pollinators - CORRECT ANSWER -
-herbaceous growth forms
