Test 2 Exam Questions Flashcards
Irrigation can result in the salinization of soils because ________
B) salts in the water are deposited on the soil surface as water evaporates
Published in the 1960s, Rachel Carson’s book Silent Spring ___
E) focused on chemical pollutants, including DDT
In 2016, the population of the United States was approximately 325 million people, with an
annual growth rate of approximately 0.7%. If the population of the United States were to
continue to grow at this rate, it would double around the year _______
C) 2116
Zero population growth occurs in a population when ________.
C) birth rate equals death rate and there is no migration
The greatest species diversity is found in which of the following groups?
E) insects
________ composes/compose just over half of all of the world’s GM crops.
B) Soybeans
Removal of which of the following species will result in the greatest changes in an ecological
system?
a keystone species
The greatest cause of the worldwide loss of species is ________
habitat destruction
Globally, approximately how many people are undernourished?
800 million
Malthus was responsible for ________
the idea that without social restrictions, increasing human population would lead to
famine and war
Contrary to popular belief, the Endangered Species Act allows _______
landowners to harm a protected species in one area if they improve habitat for it
elsewhere
Of the following, only ________ can change global species diversity
extinction
Animals that are harmed by human modification of the environment tend to have all of the
following characteristics EXCEPT:
being a dietary generalist.
Monoculture ________.
is the agricultural practice of growing large stands of a single species
Cap and trade is a system that ______
permits industries that pollute under the federal cap to sell credits to industries that
pollute over the cap
It is more energetically efficient for us to eat more _______
plant-based foods
International environmental policies arise from ______
international conventions or treaties
During the ________ stage of the demographic transition model, you would find high birth rates
but declining death rates due to increased food production and improved medical care
transitional (stage 2)
Leaders striving for sustainable development aim to satisfy a triple bottom line, which involves
what three goals?
economic advancement, environmental protection, and social equity
Which of the following best describes the human population from early times to the present?
slow, uneven growth until the 1800s, then increasingly rapid growth
The United Nations predicts that the world population will be almost ________ billion in 2050
10
Enforcement and elaboration of U.S. legislation is given to _______
administrative agencies
The loss of a particular population from a given area (but not the entire species globally) is
called ________
extirpation
The O horizon is ________
primarily composed of organic materials
An environmental impact statement is required ______
or any federal action that may affect U.S. environmental quality
Which layer of a soil profile contains topsoil?
The A horizon.
Paleontologists estimate that _______
99% of all species that have ever existed are now extinct
During the past half-century, global food production has ________ world population growth
grown at a faster rate than
_______ is the loss of more than 10% of soil productivity in arid areas due to such factors as
erosion, soil compaction, overgrazing, and forest removal
Desertification
What is the term used to describe an organism that integrates DNA from another species?
Transgenic organism
