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DC BIO Final
DC BIO Final
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1
Biological species consist of groups of ________.
populations
families
domains
genera
2
In what type of organism was the CRISPR-Cas9 system discovered?
bacteria
plant
fungi
human
3
________ convert nitrogen from nitrates to N2.
Nitrifying bacteria
Nitrogen-fixing bacteria living in the root nodules of legumes
Nitrogen-fixing bacteria living in the soil
Denitrifying bacteria
4
A reproductive barrier that prevents individuals from closely related species from interbreeding is an example of _____
a prezygotic barrier
allopatric speciation
sympatric speciation
the geographic isolation of populations
5
A regional assemblage of interacting ecosystems is a ________.
movement corridor
landscape
hot spot
community
6
Competition among individuals of the same species for the same limited resources is ________ competition.
density-independent
Type III
intraspecific
Type II
7
Eukaryotes that are not fungi, animals, or plants are classified in a "catch-all" category called ________.
bacteria
protists
archaea
seaweeds
8
Integrated pest management ________.
advocates mixed-species plantings and rotating crops
aims to keep pest populations on an exponential growth curve
advocates total eradication of pest species
favors overwhelming a pest with chemical pesticides
9
Approximately what percentage of the human genome consists of noncoding DNA?
67.0%
98.5%
87.0%
77.5%
10
Approximately what percentage of the visible light that reaches Earth's producers is converted to chemical energy?
0.1%
1%
0.01%
10%
11
Analogous structures are evidence of ________.
convergent evolution
common ancestry
stabilizing selection
divergent evolution
12
________ are an example of an invasive species.
cod
red-cockaded woodpeckers
Burmese pythons
snowshoe hares
13
In the food chain grass < antelope < human < lion, the antelope is ________.
both an herbivore and a primary consumer
both a producer and a primary consumer
a secondary consumer only
both an herbivore and a secondary consumer
14
________ is a critical abiotic factor that contributes to plant growth in savanna ecosystems.
Drought
Fire
Rain
Wind
15
________ are the mammalian group that lays eggs.
Monotremes
Eutherians
Tunicates
Marsupials
16
A feature that freed reptiles from dependence on water for reproduction is ________.
the amniotic egg
ectothermy
metamorphosis
parental care of eggs
17
Biomass is the total amount of ________ an ecosystem.
chemical elements recycled by the detritivores of
organic matter contained in the producers of
organic material in
organic matter contained in the consumers of
18
Identify a difference between embryonic and adult stem cells from the following list.
The use of embryonic stem cells raises fewer ethical issues
Embryonic cells are undifferentiated; adult stem are differentiated.
Adult stem cells are easier to grow in culture.
It is easier to obtain embryonic stem cells.
19
Land was first colonized about ________ years ago.
500 million
2.5 billion
100 million
1.7 billion
20
A vaccine works by ________.
prevents translation of mRNA that code for disease-causing proteins
inhibiting bacterial reproduction
stimulating the immune system to develop lasting defenses
killing cells infected with a virus
21
An example of a mutualism, or +/+ relationship, is ________.
between snails and the plants that they eat
cryptic coloration in frogs
between birds that use some of the same resources
between corals and unicellular algae
22
A protist with a shell made of silica is most likely a(n) ________.
diatom
dinoflagellate
foram
apicomplexan
23
Homeotic genes are important for ________.
gene regulation in eukaryotic cells
signal transduction pathways
gene expression in prokaryotes
the development of an organism's body plan
24
All but one of these are causes for increasing carbon dioxide levels. Choose the EXCEPTION
home energy use
transportation
creating compost piles from vegetable waste
production of manufactured goods
25
All of these but one are practical reasons to be concerned with preserving plant diversity. Which is the exception?
knowledge of plant communities has no impact on new medicine
Over 100 prescription drugs are made from substances derived from plants.
Humans depend on plants for lumber and jobs.
Loss of plant biodiversity, in turn, negatively affects animal biodiversity
26
A DNA fragment with the sticky end sequence TGGCA will bind with another DNA fragment with the sticky end sequence ____
ACCGT
TGCCA
TGGCA
ACGGT
27
As a result of a severe disturbance, a community will ________.
be replaced by organisms in random order
not be repopulated
undergo succession
not change
28
Bacterial RNA polymerase binds to the ________.
enhancer
operator
repressor
promoter
29
Global warming may trigger all but one of these results to occur. Choose the EXCEPTION.
changes in the breeding seasons of some species
catastrophic wildfire seasons
melting permafrost
increased forest clearing for agricultural purposes
30
In an operon, the ________ acts as an on/off switch.
repressor
promoter
activator
operator
31
An ancestral species and all its evolutionary descendants define a(n)________.
genus
ingroup
clade
outgroup
32
In prokaryotes, the production of a single RNA transcript for a group of related genes is under the control of ________.
an operon
a signal transduction pathway
enhancers
transcription factors
33
Landscape ecology ________.
the application of ecological principles to the study of land-use patterns
deals with the study of the ranges of different species
focuses primarily on how to restore human-altered ecological systems
deals primarily with ecosystems in urban settings
34
Dinosaurs (aside from the lineage that produced birds) were extinct by the end of the ________.
Eocene
cretaceous
permian
Silurian
35
A pollen grain is a ________.
seed
male gametophyte
sporophyte
36
A characteristic that is shared by snakes and birds is ________.
ectothermy
the amniotic egg
the presence of only a single ovary in females
endothermy
37
A feature unique to mammals includes ________.
the presence of hair
extended parental care of young
endothermy
laying amniotic eggs
38
FGA is one of the STRs that are used to compare DNA between different people. Why is FGA useful?
FGA is only present in some people's genomes.
FGA is present in different places in different people's genomes.
FGA varies in sequence between different people.
FGA varies in the number of repeats between different people.
39
In most developed countries, overall population growth rates ________.
are near zero, so the population size is fairly stable
are high, so the population size is fairly stable
are high, so the population size is growing rapidly
are low, so the population size is declining
40
___ is the discipline of biology that focuses on classifying organisms and determining their evolutionary relationships.
Evo-devo
Systematics
Cladistics
41
Evolutionary evidence suggests fungi evolved from ________ that also gave rise to the fourth and most diverse group
protists
plants
bacteria
42
All organisms that photosynthesize fit into which nutritional category?
mixotroph
autotrophs
parasites
heterotrophs
43
Inheritance of certain genes increases the risk of getting certain cancers; thus, it can be said that ________.
these cancers are inherited as a dominant trait
lifestyle will have little impact on cancer risk for these individuals
predisposition to these cancers is inherited
mutations that occur in somatic cells can be passed from parent to offsprin
44
A period of mass extinction is often followed by ________.
continental drift
global warming
explosive diversification
45
In an aquatic food chain, small fishes that eat zooplankton are ________.
primary consumers
producers
secondary consumers
tertiary consumers
46
________ are characterized body tissues, radial symmetry, and tentacles with stinging cells.
Roundworms
Annelids
Sponges
Cnidarians
47
In bacteria, what name is given to a cluster of genes with related functions, along with their DNA control sequences?
operator
repressor
promoter
operon
48
________, a chemical that hardens cell walls and supports terrestrial plants, is found in all plants EXCEPT ________.
Cellulose; bryophytes
Lignin; bryophytes
Lignin; ferns and bryophytes
Cellulose; ferns
49
Large, diverse, multicellular organisms first appeared in the fossil record ___ million years ago during the __.
50; Mesozoic era
290; Paleozoic era
363; Mesozoic era
600; Paleozoic era
50
Food poisoning from Salmonella occurs because of ________.
transmission between people living in close contact
extremophile conditions
an exotoxin secreted by Salmonella bacteria
an endotoxin produced by Salmonella bacteria
51
________ is(are) responsible for more cancers than any other carcinogen.
X-rays
UV radiation
asbestos
tobacco
52
In an aquatic ecosystem, what name is given to the region where photosynthesis can occur?
benthic realm
pelagic zone
photic zone
aphotic zone
53
Homeotic genes ________.
are evidence of the common ancestry of eukaryotic organisms
regulate gene expression in both prokaryotic and eukaryotic cells
have very different sequences in plant cells as compared to animal cells
are an example of convergent evolution
54
Ecology is the study of ________.
life
human effects on the environment
interactions between organisms and their environments
interactions between humans and other species
55
to assess the species diversity of a community, you would need to know the number of different species present and
the number of trophic levels in the community
the fraction of these species that are plants
the intensity of interspecific competition in the community
the relative abundance of the different species
56
If you study how two species of finches compete for food, you are trying to answer a question about ________.
organismal ecology
ecosystems ecology
population ecology
community ecology
57
In human gene therapy ________.
genetically engineered alleles, from other species, replace mutated alleles
bacterial plasmids are used to transfer genes to human patients
normal versions of genes are transferred to patients with mutated allele
58
A major function of a mushroom is to ________.
produce seeds
produce spores
photosynthesize
store nutrients
59
An effect of deforestation has been to ________.
decrease the rate of carbon dioxide production through cellular respiration
increase the rate at which carbon dioxide is incorporated into organics
decrease the amount of carbon dioxide in the atmosphere
increase the amount of carbon dioxide in the atmosphere
60
In an ideal, unlimited environment, what shape does a population's growth curve most closely resemble?
S
J then S
S then J
J
61
Logistic growth model, what happens to a population when the size of the population reaches carrying capacity?
The growth rate increases.
The growth rate decreases.
The growth rate is zero.
The growth rate cannot be determined.
62
Eukaryotes arose about ________ years after the first prokaryotes.
3.5 billion
3.0 million
1.7 billion
4.0 billion
63
Herbivory is an example of a ________ interaction.
-/-
+/+
+/-
0/+
64
If there are 500 oak trees in a forest covering 50 square kilometers (km2) then the population density is ________.
100 trees per km2
5 trees per km2
10 trees per km2
50 trees per km2
65
How can mature plants be cloned to produce genetically identical copies?
Mature plant cells contain only a fraction of the genes found in an adult
Plants have evolved over time to suit the need of human agriculture.
Mature plant cells can develop into all the specialized cells of an adult
66
________ is an example of bioremediation.
The use of prokaryotes to treat sewage
A dinoflagellate bloom causing massive fish kills
Cyanobacteria converting atmospheric nitrogen to a form that plants can use
The use of an autoclave to kill endospores
67
Homology is evidence of ________.
binomial classification
common ancestry
artificial selection
natural selection
68
Cells communicate with one another via ________.
RNA splicing
cascades of gene activation
the diffusion of RNA transcripts through adhesion junctions
signal transduction pathways
69
Like plants, fungi have _____; however, in plants they are composed of ____, whereas in fungi they are composed of ____.
cell walls; phospholipids; cellulose
cell membranes; phospholipids; chitin
cell walls; cellulose; peptidoglycan
cell walls; cellulose; chitin
70
Exploring in the tropics, you discover a nonvascular plant that produces pollen. What type of plant have you discovered?
a bryophyte
an entirely new type that you will get to name
a fern
an angiosperm
71
In the oceans, global warming has ________.
made the water more acidic
benefited corals
made the water more basic
decreased the amount of oxygen available
72
________ introduced a system for grouping species into a hierarchy of categories.
Darwin
Lamarck
Linnaeus
Aristotle
73
An unexpected freeze that kills a population of chipmunks is an example of ________.
a density-independent factor
a population momentum
a density-dependent factor
a biological control
74
Bacilli are ________ prokaryotes.
spiral
comma-shaped
rod-shaped
spherical
75
A characteristic of arthropods that has allowed for their great success is the presence of ________.
an endoskeleton
specialized segments
a brain
bilateral symmetry
76
In The Origin of Species, Darwin argued that the mechanism of descent with modification was ________.
bionomial nomenclature
artificial selection
natural selection
77
A movement corridor ________.
is a path used by migratory animals when they move to their winter habitat
is the path most commonly used by an animal within its home range
is a natural component of the environment
connects otherwise isolated patches of quality habitat for a species
78
Gymnosperms and angiosperms share multiple similarities. All of these are similarities except one. Choose the exception.
Both have pollen grains that are male gametophytes.
Both produce flowers.
Both have seeds.
Both have a dominant sporophyte generation.
79
Homology is evidence of ________.
convergent evolution
common ancestry
polyploidy
80
In most developing countries, ________.
birth rates equal death rates, so the population is fairly stable
birth rates are lower than death rates, the population is growing rapidly
birth rates are higher than death rates, the population is growing rapidly
birth rates are lower than death rates, so the population is declining
81
A change in the gene pool due to chance results in ________.
natural selection
genetic drift
environmental variation
a large gene pool
82
Besides the atmosphere, abiotic reservoirs of carbon dioxide include ________.
fossil fuels and dissolved carbon compounds in the oceans
rocks and dissolved carbon compounds in the oceans
rocks, but not fossil fuels or dissolved carbon compounds in the oceans
fossil fuels, but not dissolved carbon compounds in the oceans or rocks
83
How are the cells in different body tissues able to perform different functions?
The cells exhibit different patterns of gene expression.
The cells contain different genes.
Different chromosomes have been inactivated in different cells.
Mutations have accumulated in the cells over time.
84
In ________ the gametophyte is more obvious than the sporophyte.
ferns
grasses
conifers
mosses
85
Bears eat berries, humans, and fish; fish eat fish and insects; humans eat bears, large fish, and berries. The scenario
a food chain
a food web
parasitism
an ecosystem