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Name: ________________________ Class: ___________________ Date: __________
ID: A
Biology Chapter 6 Section 3
Multiple Choice
Identify the choice that best completes the statement or answers the question.
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1. The number of different species in the biosphere is called
a. biodiversity.
c. genetic diversity.
b. ecosystem diversity.
d. species diversity.
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2. Biodiversity is valuable in the biosphere because it
a. gives us interesting things to look at.
b. tells us about many other species.
c. is the biological life-support system of our planet.
d. provides humans with resistance to disease.
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3. All of the following are threats to biodiversity EXCEPT
a. biological magnification of toxic compounds.
b. habitat fragmentation.
c. invasive species.
d. species preservation.
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4. One property that makes DDT hazardous over time is that DDT is
a. an insecticide.
c. nonbiodegradable.
b. a perfect pesticide.
d. deadly to herbivores.
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5. As DDT moves up the trophic levels in food chains, its concentration
a. stays the same.
c. increases.
b. decreases.
d. is eliminated.
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6. The goals of conservation biology include all of the following EXCEPT
a. wise management of natural resources.
b. protection and management of individual species.
c. preservation of habitats and wildlife.
d. introducing foreign species into new environments.
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7. Protecting ecosystem diversity is a goal of
a. the green revolution.
b. conservation biology.
c.
d.
the captive breeding program.
the United Nations.
Completion
Complete each statement.
8. A location that has 170 species of birds has greater _________________________ than a location that has
100 species of birds.
9. Excessive levels of DDT in top-level consumers are a result of ______________________________.
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Name: ________________________
ID: A
10. Zoos have established _________________________ programs in which young animals are raised in
protected surroundings until the population is stable and are later returned to the wild.
Short Answer
11. What is a biodiversity “hot spot”? Where is such a hot spot in the United States?
Essay
12. Discuss biodiversity as a source of medicines.
13. What are introduced species? How are they a threat to biodiversity?
14. Discuss one of the challenges to conservation efforts in developing countries.
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ID: A
Biology Chapter 6 Section 3
Answer Section
MULTIPLE CHOICE
1.
2.
3.
4.
5.
6.
7.
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
D
C
D
C
C
D
B
PTS:
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PTS:
PTS:
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PTS:
1
1
1
1
1
1
1
REF:
REF:
REF:
REF:
REF:
REF:
REF:
p. 150
p. 150
p. 151
p. 152
p. 152
p. 154
p. 154
COMPLETION
8. ANS: species diversity
PTS: 1
REF: p. 150
9. ANS: biological magnification
PTS: 1
REF: p. 152
10. ANS: captive breeding
PTS: 1
REF: p. 154
SHORT ANSWER
11. ANS:
A biodiversity hot spot is an area where endangered species are most threatened, such as the California
Floristic Province.
PTS: 1
REF: p. 155 | p. 156
ESSAY
12. ANS:
Biodiversity is one of Earth’s greatest natural resources. Species of many kinds have provided us with foods,
industrial products, and medicines—including painkillers, antibiotics, heart drugs, antidepressants, and
anticancer drugs. For example, the rosy periwinkle plant is the source of substances used to treat certain
cancers. When biodiversity is lost, potential sources of material with significant value to the biosphere and to
humankind may be lost with it.
PTS: 1
REF: p. 150
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ID: A
13. ANS:
One of the most important threats to biodiversity today comes from apparently harmless plants and animals
that humans transport around the world either accidentally or intentionally. Introduced into new habitats,
these organisms often become invasive species that reproduce rapidly and crowd out native species. Invasive
species increase their populations rapidly because their new habitat lacks the parasites and predators that
control their populations in their native environments.
PTS: 1
REF: p. 153
14. ANS:
Sometimes, the need to protect biodiversity is greatest in countries that are least able to do so. The destruction
of tropical rain forests, for example, is the single greatest threat to biodiversity on land. Most rain forests are
located in developing countries, where conservation goals must be weighed against the survival needs of the
human population.
PTS: 1
REF: p. 155
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