Biology (Raven), 9th Edition

Chapter 60: Conservation Biology

Pre-Test

1
Shortly after humans arrived in North America after the last Ice Age, at least what percentage of large mammals became extinct?
A)10%
B)25%
C)50%
D)75%
E)100%
2
Intact ecosystems provide all of the following services except
A)warming the atmosphere.
B)maintaining water.
C)quality.
D)preserving soils and nutrients.
E)moderating local climates.
3
What is the cause of almost half of all amphibian species experiencing decreases in population size?
A)Disease
B)Famine
C)Pollution
D)Natural causes
E)No single cause has been identified, which implies that global environmental changes may be responsible.
4
Restoration by removal of introduced species is
A)impossible.
B)very difficult and is most successful if done very soon after a new species is introduced.
C)very difficult and is most successful if done long after a new species is introduced.
D)relatively easy if done soon after a new species is introduced.
E)relatively easy if done long after a new species is introduced.
5
The best way to preserve biodiversity is to
A)preserve intact ecosystems rather than individual species.
B)fragment ecosystems and concentrate on individual species.
C)concentrate on individual species rather than ecosystems.
D)create "biodiversity" zones with fragmented habitats.
E)increase the population sizes of more diverse species.
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