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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 NO2 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 CO2 (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 oC
B increased by about 1 oC
C not changed
D decreased by about 1 oC
E decreased by over 5 oC
    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 (CO2)
C carbon monoxide (CO)
D nitric oxide (NO)
E ozone (03)
    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 oC colder
B 15 oC colder
C no different
D 15 oC warmer
E 30 oC 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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