Environmental Science (Enger) 12th Edition

Chapter 11: Biodiversity Issues

Practice Quiz

1
Biodiversity is a broad term that describes the diversity of ______ in a region.
A)rocks
B)species
C)water
D)humans
2
Species diversity is the
A)measure of the number of different species in an area.
B)reproductive rate of a species in an area.
C)survival rate of a species in an area.
D)measure of the different kinds of genes in a population.
3
According to the World Conservation Union, the majority of threatened species are at risk due to
A)pesticides/herbicides.
B)overexploitation.
C)loss of habitat and fragmentation.
D)climate change.
4
Patchwork clear cutting is a less environmentally-friendly method of timber harvesting than clear cutting.
A)True
B)False
5
A minor environmental concern for freshwater aquaculture is nutrient overload.
A)True
B)False
6
Most species that exist or have existed on Earth are now extinct.
A)True
B)False
7
The value of biodiversity does not include direct economic value.
A)True
B)False
8
Humans do not significantly modify natural ecosystems.
A)True
B)False
9
Over the past hundred years, humans have decreased the species extinction rate.
A)True
B)False
10
Currently, the most rapid changes in species extinction are happening in under developed countries.
A)True
B)False
11
The Endangered Species Act
A)established wilderness areas.
B)forced states to develop sustainable management policies.
C)forced countries to stop overharvesting marine resources.
D)gave the government power to use whatever measures necessary to stop the extinction of species.
12
Changes in the genetic information of an organism is known as
A)mutation.
B)speciation.
C)diversity.
D)gene flow.
13
Genetic diversity of a population can be affected by
A)migration.
B)sexual reproduction.
C)population size.
D)All of the above are correct.
14
Selective breeding has no affect on genetic diversity.
A)True
B)False
15
Ecosystem diversity is a measure of the number of kinds of ecosystems absent in an area.
A)True
B)False
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