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NATS104 LIFE ON EARTH
INTERNET PRACTICE EXAM THREE
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1.
A substance or environmental factor that causes birth defects is a
A
carcinogen
B
hazard
C
mutagen
D
risk
E
teratogen
Unanswered
2.
A substance or environmental factor that causes harm is a
A
carcinogen
B
hazard
C
mutagen
D
risk
E
teratogen
Unanswered
3.
According to the theory of island biogeography, nearshore islands have ___ & larger islands have ___
A
faster immigration, faster extinction
B
faster immigration, slower extinction
C
no immigration, no extinction
D
slower immigration, faster extinction
E
slower immigration, slower extinction
Unanswered
4.
Based on U.S. census data, Tucson, like the rest of the world, appears to be following which growth curve?
A
B
C
D
E
Unanswered
5.
All of the following are reasons for natural climate change except:
A
changes in greenhouse gas concentrations
B
changes in ocean circulation
C
changes in the Earth's orbit
D
changes in cosmic radiation
E
changes in the sun
Unanswered
6.
Atmospheric nitrogen dioxide NO
2
is primarily a ___ pollution
A
cosmogenic
B
isotopic
C
primary
D
pyroclastic
E
secondary
Unanswered
7.
Biomagnification is
A
cancer causing, example tobacco
B
changes genetic code (DNA), example organic solvents
C
concentration of toxins in higher levels of food chain
D
lethal in small quantities
E
probable cause of death
Unanswered
8.
Carcinogens are
A
cancer causing, example tobacco
B
changes genetic code (DNA), example organic solvents
C
concentration of toxins in higher levels of food chain
D
lethal in small quantities
E
probable cause of death
Unanswered
9.
A mutagen
A
cancer causing, example tobacco
B
changes genetic code (DNA), example organic solvents
C
concentration of toxins in higher levels of food chain
D
lethal in small quantities
E
probable cause of death
Unanswered
10.
Poison is
A
cancer causing, example tobacco
B
changes genetic code (DNA), example organic solvents
C
concentration of toxins in higher levels of food chain
D
lethal in small quantities
E
probable cause of death
Unanswered
11.
During the last 12,000 years, the warmest and driest global climate was about ____ years ago
A
1000
B
3000
C
5000
D
7000
E
11,000
Unanswered
12.
During the twenty-first century, plants and animals in the northern hemisphere are expected to
A
migrate northward and to higher elevation
B
migrate northward and to lower elevation
C
migrate southward and to higher elevation
D
migrate southward and to lower elevation
E
maintain their current distributions
Unanswered
13.
The appropriate species interaction pair for Commensalism is
A
-1, -1
B
-1, +1
C
0, 0
D
0, +1
E
+1, +1
Unanswered
14.
The appropriate species interaction pair for Competition is
A
-1, -1
B
-1, +1
C
0, 0
D
0, +1
E
+1, +1
Unanswered
15.
The appropriate species interaction pair for Mutualism is
A
-1, -1
B
-1, +1
C
0, 0
D
0, +1
E
+1, +1
Unanswered
16.
The appropriate species interaction pair for Parasitism is
A
-1, -1
B
-1, +1
C
0, 0
D
0, +1
E
+1, +1
Unanswered
17.
The appropriate species interaction pair for Predation is
A
-1, -1
B
-1, +1
C
0, 0
D
0, +1
E
+1, +1
Unanswered
18.
The graph (below, x-axis = time) best matches the history of the atmospheric concentration of CO
2
(y-axis) for the last ___ years
A
15
B
150
C
15,000
D
1,500,000
E
1,500,000,000
Unanswered
19.
Growth of the ozone hole requires __ and __
A
high pressure, ultraviolet radiation
B
high temperature, ultraviolet radiation
C
high temperature, infrared radiation
D
low pressure, infrared radiation
E
low temperature, ultraviolet radiation
Unanswered
20.
In general, for widespread species, biodiversity in the tropics is ___ biodiversity at the poles
A
equal to
B
greater than
C
less than
Unanswered
21.
In the United States, most deaths are due to ___ diseases
A
epidemic
B
nontransmissable
C
nontreatable
D
teratogenic
E
transmissable
Unanswered
22.
Most of the North American megafauna (mastodons, mammoths, camels, etc.) became extinct about ___ years ago
A
150
B
6,000
C
12,000
D
500,000
E
1,600,000
Unanswered
23.
Of the inner planets, the greenhouse effect is greatest on
A
Earth
B
Luna
C
Mars
D
Mercury
E
Venus
Unanswered
24.
Organisms with J-shaped population growth curves (below) are characterized by
A
long lifespans
B
having few offspring
C
large body size
D
poor competitive ability
E
slow body growth
Unanswered
25.
Over the last 150 years, the average temperature of the Earth has
A
increased by over 5
o
C
B
increased by about 1
o
C
C
not changed
D
decreased by about 1
o
C
E
decreased by over 5
o
C
Unanswered
26.
Bird-hipped dinosaurs are ___________
A
Icthyosaurs
B
Orniticians
C
Pterosaurs
D
Sauriscians
E
Sauropods
Unanswered
27.
Due to the Copenhagen Amendments of the Montreal Protocol, the production of CFCs
A
has increased and the ozone holes are larger
B
has increased and the ozone holes will soon be smaller
C
is less and the ozone holes are steadily growing
D
is less and the ozone hole may soon be smaller
E
has stopped and the ozone holes are smaller
Unanswered
28.
Populations of K-strategist organisms tend to increase through time until the ________ is reached.
A
carbon cycle
B
carrying capacity
C
coping mechanism
D
crude birth rate
E
crude death rate
Unanswered
29.
Referring to the figure (below), the labeled item most closely associated with island surface area is
A
B
C
D
E
Unanswered
30.
Referring to the figure (above), "E" should be labeled
A
equilibrium
B
extinction
C
number of species
D
immigration
E
rate
Unanswered
31.
The "r" in "r-strategist species" refers to
A
competition
B
equilibrium population size
C
intrinsic rate of growth
D
optimal population structure
E
predator/prey ratio
Unanswered
32.
The "Greenhouse Effect" refers to the absorption of what kind of radiation by trace-gases in a planet's lower atmosphere?
A
cosmic
B
infrared
C
ultraviolet
D
visible
E
X-ray
Unanswered
33.
The climate event characterized by high atmospheric pressure over the eastern Pacific and enhanced upwelling of cold waters of the South American coast is
A
El Niño
B
La Niña
C
ITCZ
D
PDSI
E
SST
Unanswered
34.
The Earth's atmosphere is about 78%
A
Argon
B
Carbon Dioxide
C
Nitrogen
D
Oxygen
E
Water Vapor
Unanswered
35.
The effect of the ozone hole is increased ____ radiation at the surface of the earth.
A
cosmic
B
infrared
C
ultraviolet
D
visible
E
X-ray
Unanswered
36.
The epidemic that has caused the greatest number of deaths in the United States is the __ epidemic
A
AIDS
B
Bubonic Plague
C
Polio
D
SARS
E
Spanish Flu
Unanswered
37.
The graph (below) is an example of
A
competitive growth
B
exponential growth
C
logistic growth
D
optimized growth
E
selective growth
Unanswered
38.
The most deadly disease worldwide, causing nearly 4 million deaths a year is
A
AIDS
B
Diarrheas
C
Malaria
D
Measles
E
Respiratory infections
Unanswered
39.
Dinosaurs became Earth's dominant animals during the
A
Cenozoic
B
Holocene
C
Mesozoic
D
Paleozoic
E
Pleistocene
Unanswered
40.
What is this bulge in the 40-50 age class due to, in the population pyramid for the United States (below).
A
better modern sanitation for infants
B
high death rate in younger individuals
C
high influx of older immigrants
D
low death rate due of older individuals
E
post-World War II baby boom
Unanswered
41.
What air pollutant from automobile exhaust is a source of acid deposition?
A
Argon (Ar)
B
carbon dioxide (CO
2
)
C
carbon monoxide (CO)
D
nitric oxide (NO)
E
ozone (0
3
)
Unanswered
42.
What has been the history of global climate over the last two billion years?
A
alternation between icebox and greenhouse climate with increasing amplitude
B
alternation between icebox and greenhouse climate with overall cooling
C
alternation between icebox and greenhouse climate with overall warming
D
gradual cooling
E
gradual warming
Unanswered
43.
What has been the history of global climate over the last million years?
A
alternation between icebox and greenhouse climate with increasing amplitude
B
alternation between icebox and greenhouse climate with overall cooling
C
alternation between icebox and greenhouse climate with overall warming
D
gradual cooling
E
gradual warming
Unanswered
44.
What is a species whose presence or absence affects diversity of the entire ecosystem in which it exists?
A
Exotic species
B
Indicator species
C
Keystone species
D
Predator species
E
Prey species
Unanswered
45.
What is the approximate current human population of earth?
A
7,000,000
B
7,000,000
C
7,000,000,000
D
70,000,000,000
E
7,000,000,000,000,000
Unanswered
46.
Which of the following is an example of a nontransmissible human disease?
A
AIDS
B
athlete's foot
C
emphysema
D
gonorrhea
E
influenza
Unanswered
47.
Which of the following is
NOT
a potential biological warfare agent?
A
antibiotic resistant diseases
B
biotoxins
C
genetically engineered diseases
D
nontransmissable diseases
E
spores
Unanswered
48.
Which of the following sequences places the layers of the atmosphere in order from lowest (left) to highest (right)?
A
mesosphere, thermosphere, troposphere, stratosphere
B
stratosphere, troposphere, mesosphere, thermosphere
C
stratosphere, thermosphere, mesosphere, troposphere
D
thermosphere, mesosphere, stratosphere, troposphere
E
troposphere, stratosphere, mesosphere, thermosphere
Unanswered
49.
Without the greenhouse effect, the surface of Earth would be an average of
A
30
o
C colder
B
15
o
C colder
C
no different
D
15
o
C warmer
E
30
o
C warmer
Unanswered
50.
Why is soot so dangerous to health?
A
it's a byproduct of fire
B
it's dirty
C
it's hot
D
it's particles are very small
E
it's radioactive
Unanswered
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