ENVS 1126 LSU EXAM 2 (Aixin Hou)
A declining dependency ratio - ANS-permits decreased spending on education and old-age
medical expenses.
A person who dies of a heart attack at the age of 93 is more likely to have lived in a -
ANS-developed country
As a cold front moves into an area of warm, moist air, we would expect to see cloud formations
as - ANS-the warm air rises and condenses
As environmental systems have declined, human well-being has improved. What is the most
probable reason for this "Environmentalist's Paradox"? - ANS-Enhanced food production has
outweighed declines in ecosystem services.
At the mouth of the Mississippi River, large concentrations of nitrogen and phosphorus flow into
the Gulf of Mexico, causing nutrient overloading, algal blooms, and extremely low levels of
oxygen. One of the major revolutions in human history, the ___________
__________________, is most responsible for this problem. - ANS-Green Revolution
Converting forests to mostly paved urban areas has largely altered the hydrology of the affected
watersheds because - ANS-infiltration has decreased and surface runoff has increased
Even if a developing country reduces its birth rate and maintains replacement-level fertility, its
population will still continue to grow for several decades because of_____________. This
population growth is due to the current number of people in the childbearing age-range. -
ANS-population momentum
Global warming during the 21st century is expected to - ANS-speed up the hydrologic cycle
If a country experiences 7 births, 2 deaths, and 1 new immigrant every minute of a year, how
will its population change in one year? - ANS-the population will increase by about 3.2 million
people
If r represents a gene for resistance to DDT, and to be resistant an individual must be
homozygous, choose the resistant individual(s) below: - ANS-rr
In a country undergoing the demographic transition, population growth occurs because ______.
- ANS-the death rate declines first while the birthrate stays high
In any food web, biomagnification will result in the highest concentrations of toxins in the -
ANS-highest trophic level of the systems
, In many coastal areas, springs of outflowing groundwater lie under the ocean. ________ occurs
in coastal regions where the water table is falling due to groundwater overdraft. - ANS-saltwater
intrusion
In the western United States, rain shadows most frequently occur on - ANS-the leeward, east
side of mountain ranges
Most molecular compounds that have a mass similar to water are gases at room temperature.
Because of the strong __________ bonds, water molecules are able to stay condensed in the
liquid state. - ANS-hydrogen
Since 1985, total fertility rates have been _________. - ANS-declining
Social modernization involves many aspects that revolve around - ANS-the education and
enfranchisement of women.
The Alabama Canebrake pitcher plant is a carnivorous plant that is unique to Alabama, growing
in only Autauga and Chilton counties in the central area of the state. The Canebrake grows in
acidic soils that are low in nutrients. If you wanted to photograph a Canebrake, what type of
wetland would you go to? - ANS-bog
The amount of biomass on successive trophic levels in a food chain forms a pyramid in which
the biomass on trophic level N+1 is only 20% of the biomass on trophic level N. Pollutant X is
transferred up the food chain from one trophic level to the next with an efficiency of 80%. If the
concentration of X on trophic level 2 is 4 ppm, what would you expect the concentration of X to
be on trophic level 4? - ANS-64 ppm
The current world population is approximately ______, and at present, we expect there to be
about _______ people on earth when the population stabilizes in about 60 years. - ANS-8
billion; 10 billion
The Industrial Revolution has led to an increased reliance on fossil fuels to - ANS-power farm
machinery and to produce fertilizers and pesticides.
The location of deserts in the northern and southern regions of Africa are best explained by
understanding - ANS-convective air movement in Hadley cells
The planting of strips of trees and shrubs along the edges of plowed fields is used to -
ANS-decrease wind erosion
The process by which water vapor passes through stomata from plants to the atmosphere is
called - ANS-transpiration
A declining dependency ratio - ANS-permits decreased spending on education and old-age
medical expenses.
A person who dies of a heart attack at the age of 93 is more likely to have lived in a -
ANS-developed country
As a cold front moves into an area of warm, moist air, we would expect to see cloud formations
as - ANS-the warm air rises and condenses
As environmental systems have declined, human well-being has improved. What is the most
probable reason for this "Environmentalist's Paradox"? - ANS-Enhanced food production has
outweighed declines in ecosystem services.
At the mouth of the Mississippi River, large concentrations of nitrogen and phosphorus flow into
the Gulf of Mexico, causing nutrient overloading, algal blooms, and extremely low levels of
oxygen. One of the major revolutions in human history, the ___________
__________________, is most responsible for this problem. - ANS-Green Revolution
Converting forests to mostly paved urban areas has largely altered the hydrology of the affected
watersheds because - ANS-infiltration has decreased and surface runoff has increased
Even if a developing country reduces its birth rate and maintains replacement-level fertility, its
population will still continue to grow for several decades because of_____________. This
population growth is due to the current number of people in the childbearing age-range. -
ANS-population momentum
Global warming during the 21st century is expected to - ANS-speed up the hydrologic cycle
If a country experiences 7 births, 2 deaths, and 1 new immigrant every minute of a year, how
will its population change in one year? - ANS-the population will increase by about 3.2 million
people
If r represents a gene for resistance to DDT, and to be resistant an individual must be
homozygous, choose the resistant individual(s) below: - ANS-rr
In a country undergoing the demographic transition, population growth occurs because ______.
- ANS-the death rate declines first while the birthrate stays high
In any food web, biomagnification will result in the highest concentrations of toxins in the -
ANS-highest trophic level of the systems
, In many coastal areas, springs of outflowing groundwater lie under the ocean. ________ occurs
in coastal regions where the water table is falling due to groundwater overdraft. - ANS-saltwater
intrusion
In the western United States, rain shadows most frequently occur on - ANS-the leeward, east
side of mountain ranges
Most molecular compounds that have a mass similar to water are gases at room temperature.
Because of the strong __________ bonds, water molecules are able to stay condensed in the
liquid state. - ANS-hydrogen
Since 1985, total fertility rates have been _________. - ANS-declining
Social modernization involves many aspects that revolve around - ANS-the education and
enfranchisement of women.
The Alabama Canebrake pitcher plant is a carnivorous plant that is unique to Alabama, growing
in only Autauga and Chilton counties in the central area of the state. The Canebrake grows in
acidic soils that are low in nutrients. If you wanted to photograph a Canebrake, what type of
wetland would you go to? - ANS-bog
The amount of biomass on successive trophic levels in a food chain forms a pyramid in which
the biomass on trophic level N+1 is only 20% of the biomass on trophic level N. Pollutant X is
transferred up the food chain from one trophic level to the next with an efficiency of 80%. If the
concentration of X on trophic level 2 is 4 ppm, what would you expect the concentration of X to
be on trophic level 4? - ANS-64 ppm
The current world population is approximately ______, and at present, we expect there to be
about _______ people on earth when the population stabilizes in about 60 years. - ANS-8
billion; 10 billion
The Industrial Revolution has led to an increased reliance on fossil fuels to - ANS-power farm
machinery and to produce fertilizers and pesticides.
The location of deserts in the northern and southern regions of Africa are best explained by
understanding - ANS-convective air movement in Hadley cells
The planting of strips of trees and shrubs along the edges of plowed fields is used to -
ANS-decrease wind erosion
The process by which water vapor passes through stomata from plants to the atmosphere is
called - ANS-transpiration
