Multiple Choice
Identify the letter of the choice that
best completes the statement or answers the question.
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1.
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In the
very distant past, most people a. | lived in small groups. | b. | lived in permanent settlements. | c. | did not gather plants. | d. | did not hunt animals. | | |
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2.
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Imported plants in Hawaii have a. | crowded out many native species. | b. | reduced the native bird species. | c. | introduced diseases. | d. | depleted natural resources. | | |
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3.
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Early
hunters and gatherers in North America are responsible for a. | natural plant and animal
populations. | b. | a major
extinction event of large animals. | c. | producing new varieties of
crops. | d. | inventing
technology such as manufactured tools. | | |
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4.
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Which
has become the most important source for environmental change on Earth? a. | climate | b. | energy | c. | human activity | d. | conservation biology | | |
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5.
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An
old-growth forest is a. | a renewable resource. | b. | a nonrenewable resource. | c. | a microclimate. | d. | poor in biodiversity. | | |
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6.
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Why
are fossil fuels nonrenewable? a. | They require hundreds of millions of years to
form. | b. | Their ecosystems
change forever when they are burned. | c. | They are converted to carbon dioxide when they are
burned. | d. | They exist in a
very small supply. | | |
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7.
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The
wearing away of surface soil by water and wind is known as a. | deforestation. | b. | desertification. | c. | overgrazing. | d. | soil erosion. | | |
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8.
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The
sulfur and nitrogen compounds in smog combine with water to form a. | ozone. | b. | ammonia. | c. | acid rain. | d. | chlorofluorocarbons. | | |
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9.
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Of the
following items, the last to occur when toxic chemicals are discarded into a stream is that the
chemicals a. | pose a threat to
human health. | b. | enter the food
chain. | c. | are carried into
a lake. | d. | harm aquatic
plants and animals. | | |
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10.
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Using
renewable resources while ensuring that they are not depleted is a practice called a. | sustainable use. | b. | monoculture. | c. | biological magnification. | d. | renewable resource. | | |
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11.
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The
number of different species in the biosphere is called a. | biodiversity. | b. | ecosystem diversity. | c. | genetic diversity. | d. | species diversity. | | |
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12.
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Biodiversity is important to human society because it a. | is a natural resource. | b. | provides food and goods. | c. | provides medicines. | d. | all of the above | | |
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13.
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The
sum total of the genetically-based variety of living organisms in the biosphere is
called a. | species
diversity. | b. | sustainable
use. | c. | biodiversity. | d. | conservation biology. | | |
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14.
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An
endangered species is a. | a diseased animal. | b. | a dangerous predator. | c. | a group of organisms near
extinction. | d. | all organisms at
the top of a food chain. | | |
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15.
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DDT
was used to a. | fertilize
soil. | b. | kill
insects. | c. | form
ozone. | d. | feed
animals. | | |
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16.
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One of
the greatest threats today to biological diversity is a. | old-growth forests. | b. | ozone depletion. | c. | habitat destruction. | d. | monoculture. | | |
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17.
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As DDT
moves up the trophic levels in food chains, or food webs, its concentration a. | stays the same. | b. | increases. | c. | decreases. | d. | is eliminated. | | |
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18.
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An
increase in Earth’s average temperature from the buildup of carbon dioxide and other gases in
the atmosphere is called a. | the greenhouse effect. | b. | ozone depletion. | c. | global warming. | d. | particulate dispersal. | | |
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19.
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Some
scientists think that global warming is a. | a natural variation in climate. | b. | difficult to predict. | c. | melting the polar ice caps. | d. | all of the above | | |
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20.
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The
major cause of ozone depletion is a. | nitric acid. | b. | sulfuric acid. | c. | chlorofluorocarbons. | d. | ultraviolet light. | | |
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