BIO 200 Final Exam (Past Exams)
Questions with Complete Answers
Among invertebrates, arthropods are unique in possessing members that have...
a. segmented bodies
b. a ventral nerve cord
c. wings
d. open circulation
e. a cuticle - ANSWER-c. wings
Evidence of which structure or characteristic would be most surprising to find among
the fossils of the pre-Cambrian fauna?
a. true tissues
b. hard parts
c. bilateral symmetry
d. cephalization
e. embryos - ANSWER-b. hard parts
The most ancient branch point in animal phylogeny is between having...
a. true tissues or no tissues
b. a well-define head or no head
c. radial or bilateral symmetry
d. diploblastic or triploblastic embryos
e. a body cavity or no body cavity - ANSWER-a. true tissues or no tissues
What was the adaptive trait of Gnathostomes that allowed for mobile predation?
a. breathe through their skin
b. four well-developed limbs
c. swim bladders
d. hollow bones
e. jaws - ANSWER-e. jaws
A student encounters an animal embryo at the eight-cell stage. The four smaller cells
that comprise one hemisphere of the embryo seem to be rotated 45 degrees and lie
in the grooves between larger, underlying cells (spiral cleavage). The embryo may
potentially develop into a/n...
a. bee
b. hagfish
c. sea star
d. ostrich
,e. flat worm - ANSWER-e. flat worm
Acoela is a group characterized as acoelomates, which means that these
organisms...
a. have chitinous cuticles
b. have segmentation
c. have no body cavity
d. are deuterostomes
e. have radial symmetry - ANSWER-c. have no body cavity
Which of the following do all eukaryotes share?
a. cell walls made of cellulose
b. chloroplasts
c. alternation of generations
d. heterotrophy
e. none of the above - ANSWER-e. none of the above
The traditional three or five kingdom phylogenic classifications of life has been
modified with a three domain system because there are...
a. 3 fundamental mechanisms of intracellular organization
b. 3 different cell division processes
c. 3 fundamental layers
d. 3 fundamental mechanisms of metabolism: fermentation, glycolysis, and
photosynthesis - ANSWER-a. 3 fundamental mechanisms of intracellular
organization
Which of the following about Prokaryotes is true?
a. they cannot adapt to changing conditions
b. they demonstrate a wide variety of metabolic abilities
c. all store their genetic material within a nucleus
d. prokaryotes are not considered living organisms
e. all require a source of organic carbon for their energy and matter - ANSWER-b.
they demonstrate a wide variety of metabolic abilities
If two microbes are trying to occupy the same niche, what possible interactions might
you expect?
a. they might communication and cooperate to share the area
b. one might produce a toxin that would limit growth of the other
c. they might partition the niche and occupy different parts of the total
d. one might kill the other one
e. all the above are possible interactions - ANSWER-e. all the above are possible
interactions
Which of the following characteristics are found in some organisms of all three
domains?
, a. individuals that sometimes are multicellular and haploid and at other times are
multicellular and diploid
b. cell walls made of cellulose that allow the cell to retain its high integrity in different
environments
c. metabolic pathways allowing synthesis of organic molecules from precursors using
energy from sunlight or inorganic compounds
d. cell division strategies that result in gametes being produced directly by meiosis -
ANSWER-c. metabolic pathways allowing synthesis of organic molecules from
precursors using energy from sunlight or inorganic compounds
Which of the following is an ecological role of Prokaryotes?
a. production of biologically available nitrogen molecules
b. recycling organic material
c. primary production in both aquatic and terrestrial ecosystems
d. parasites of other organisms
e. all the above are possible - ANSWER-e. all the above are possible
The evolutionary history of the mitochondrion is easier to traces than that of the
chloroplast because...
a. the current data indicate that all mitochondria descend from one prokaryote line
b. chloroplasts have much larger genomes that do mitochondria so they are harder
to study
c. multiple different phototrophs were internalized and retained leading to different
chloroplast lines
d. chloroplasts are more important than mitochondria
e. both a and c are correct - ANSWER-e. both a and c are correct
Why are many eukaryotes that exist in groups that look like multicellular individuals
not considered truly multicellular organisms?
a. each cell in the collection is likely derived from a different parent
b. multicellular organisms show a level communication, coordination, and cell
specialization not seen in colonies of single cells
c. the DNA in each cell is likely different
d. in general, each cell in the collection can perform all the function of all the other
cells at any time
e. all the above are possible explanations - ANSWER-e. all the above are possible
explanations
Plants with a vascular system can...
a. interact with animals in a more meaningful way
b. direct nutrients to where they are needed
c. are shorter, in general, than plants without a vascular system
d. grow forever - ANSWER-b. direct nutrients to where they are needed
Questions with Complete Answers
Among invertebrates, arthropods are unique in possessing members that have...
a. segmented bodies
b. a ventral nerve cord
c. wings
d. open circulation
e. a cuticle - ANSWER-c. wings
Evidence of which structure or characteristic would be most surprising to find among
the fossils of the pre-Cambrian fauna?
a. true tissues
b. hard parts
c. bilateral symmetry
d. cephalization
e. embryos - ANSWER-b. hard parts
The most ancient branch point in animal phylogeny is between having...
a. true tissues or no tissues
b. a well-define head or no head
c. radial or bilateral symmetry
d. diploblastic or triploblastic embryos
e. a body cavity or no body cavity - ANSWER-a. true tissues or no tissues
What was the adaptive trait of Gnathostomes that allowed for mobile predation?
a. breathe through their skin
b. four well-developed limbs
c. swim bladders
d. hollow bones
e. jaws - ANSWER-e. jaws
A student encounters an animal embryo at the eight-cell stage. The four smaller cells
that comprise one hemisphere of the embryo seem to be rotated 45 degrees and lie
in the grooves between larger, underlying cells (spiral cleavage). The embryo may
potentially develop into a/n...
a. bee
b. hagfish
c. sea star
d. ostrich
,e. flat worm - ANSWER-e. flat worm
Acoela is a group characterized as acoelomates, which means that these
organisms...
a. have chitinous cuticles
b. have segmentation
c. have no body cavity
d. are deuterostomes
e. have radial symmetry - ANSWER-c. have no body cavity
Which of the following do all eukaryotes share?
a. cell walls made of cellulose
b. chloroplasts
c. alternation of generations
d. heterotrophy
e. none of the above - ANSWER-e. none of the above
The traditional three or five kingdom phylogenic classifications of life has been
modified with a three domain system because there are...
a. 3 fundamental mechanisms of intracellular organization
b. 3 different cell division processes
c. 3 fundamental layers
d. 3 fundamental mechanisms of metabolism: fermentation, glycolysis, and
photosynthesis - ANSWER-a. 3 fundamental mechanisms of intracellular
organization
Which of the following about Prokaryotes is true?
a. they cannot adapt to changing conditions
b. they demonstrate a wide variety of metabolic abilities
c. all store their genetic material within a nucleus
d. prokaryotes are not considered living organisms
e. all require a source of organic carbon for their energy and matter - ANSWER-b.
they demonstrate a wide variety of metabolic abilities
If two microbes are trying to occupy the same niche, what possible interactions might
you expect?
a. they might communication and cooperate to share the area
b. one might produce a toxin that would limit growth of the other
c. they might partition the niche and occupy different parts of the total
d. one might kill the other one
e. all the above are possible interactions - ANSWER-e. all the above are possible
interactions
Which of the following characteristics are found in some organisms of all three
domains?
, a. individuals that sometimes are multicellular and haploid and at other times are
multicellular and diploid
b. cell walls made of cellulose that allow the cell to retain its high integrity in different
environments
c. metabolic pathways allowing synthesis of organic molecules from precursors using
energy from sunlight or inorganic compounds
d. cell division strategies that result in gametes being produced directly by meiosis -
ANSWER-c. metabolic pathways allowing synthesis of organic molecules from
precursors using energy from sunlight or inorganic compounds
Which of the following is an ecological role of Prokaryotes?
a. production of biologically available nitrogen molecules
b. recycling organic material
c. primary production in both aquatic and terrestrial ecosystems
d. parasites of other organisms
e. all the above are possible - ANSWER-e. all the above are possible
The evolutionary history of the mitochondrion is easier to traces than that of the
chloroplast because...
a. the current data indicate that all mitochondria descend from one prokaryote line
b. chloroplasts have much larger genomes that do mitochondria so they are harder
to study
c. multiple different phototrophs were internalized and retained leading to different
chloroplast lines
d. chloroplasts are more important than mitochondria
e. both a and c are correct - ANSWER-e. both a and c are correct
Why are many eukaryotes that exist in groups that look like multicellular individuals
not considered truly multicellular organisms?
a. each cell in the collection is likely derived from a different parent
b. multicellular organisms show a level communication, coordination, and cell
specialization not seen in colonies of single cells
c. the DNA in each cell is likely different
d. in general, each cell in the collection can perform all the function of all the other
cells at any time
e. all the above are possible explanations - ANSWER-e. all the above are possible
explanations
Plants with a vascular system can...
a. interact with animals in a more meaningful way
b. direct nutrients to where they are needed
c. are shorter, in general, than plants without a vascular system
d. grow forever - ANSWER-b. direct nutrients to where they are needed
