ENVS 1126 EXAM 2 QUESTIONS AND
ANSWERS 2026 VERIFIED.
Which of the following is the greatest source of exposure to radiation for people in the United
States?
Continued fallout from nuclear testing
Radon gas in average house
Natural radioactivity in the body
Cosmic radiation - ANS Radon gas in the average house
Which of the following is the major cause of mortality in the least developed countries in the
world?
Cardiovascular disease
Cancer
Injuries
Communicable diseases - ANS Communicable diseases
Which of the following reasons accounts for the fact that timber sales from national forests in
the United States declined by about 80% during the 1990s?
The biomass of the trees had seriously declined during previous decades because the trees had
been harvested at a rate that was not sustainable
The strategy of managing the forests changed: trees are now harvested at much longer time
intervals
Outbreaks of gypsy moths and tussock moths caused widespread defoliation of trees before an
effective biological control was identified
, The forest service made no effort to extinguish fires started by lightning in national forests on
the assumption that fires, although temporarily destructive, in the long run exerted a positive
influence on the forests - ANS The strategy of managing the forests changed: trees are now
harvested at much longer time intervals
In hypothetical country a, everyone dies when they reach the age of 60. In hypothetical country
b, which has a better health care system, everyone dies when they reach the age of 80. If the
total population is both countries is stable, what percentage of the total population would you
expect to be in the age group 21-40 years inclusive?
25% in country a and 33% in country b
33% in country a and 25% in country b
20% in country a and 15% in country b
15% in country a and 20% in country b - ANS 33% in country a and 25% in country b
What is the principal reason that western rangelands in the United States produce less than half
the livestock forage that they did in the early 19th century?
Over-drafting of aquifers
Failure to rotate crops
Over cultivation
Overgrazing - ANS Overgrazing
Which one of the following is the best soil for agriculture?
Aridisol
Mollisol
Alfisol
Oxisol - ANS Mollisol
Which of the following countries has the shortest life expectancy?
UK
US
Japan
ANSWERS 2026 VERIFIED.
Which of the following is the greatest source of exposure to radiation for people in the United
States?
Continued fallout from nuclear testing
Radon gas in average house
Natural radioactivity in the body
Cosmic radiation - ANS Radon gas in the average house
Which of the following is the major cause of mortality in the least developed countries in the
world?
Cardiovascular disease
Cancer
Injuries
Communicable diseases - ANS Communicable diseases
Which of the following reasons accounts for the fact that timber sales from national forests in
the United States declined by about 80% during the 1990s?
The biomass of the trees had seriously declined during previous decades because the trees had
been harvested at a rate that was not sustainable
The strategy of managing the forests changed: trees are now harvested at much longer time
intervals
Outbreaks of gypsy moths and tussock moths caused widespread defoliation of trees before an
effective biological control was identified
, The forest service made no effort to extinguish fires started by lightning in national forests on
the assumption that fires, although temporarily destructive, in the long run exerted a positive
influence on the forests - ANS The strategy of managing the forests changed: trees are now
harvested at much longer time intervals
In hypothetical country a, everyone dies when they reach the age of 60. In hypothetical country
b, which has a better health care system, everyone dies when they reach the age of 80. If the
total population is both countries is stable, what percentage of the total population would you
expect to be in the age group 21-40 years inclusive?
25% in country a and 33% in country b
33% in country a and 25% in country b
20% in country a and 15% in country b
15% in country a and 20% in country b - ANS 33% in country a and 25% in country b
What is the principal reason that western rangelands in the United States produce less than half
the livestock forage that they did in the early 19th century?
Over-drafting of aquifers
Failure to rotate crops
Over cultivation
Overgrazing - ANS Overgrazing
Which one of the following is the best soil for agriculture?
Aridisol
Mollisol
Alfisol
Oxisol - ANS Mollisol
Which of the following countries has the shortest life expectancy?
UK
US
Japan
