Site MapHelpFeedbackMultiple Choice Quiz
Multiple Choice Quiz
(See related pages)

1
Conservation biology is a long established field of study.
A)True
B)False
2
Conservation biology is concerned with _____.
A)developing scientific concepts about the nature and evolutionary origin of biodiversity
B)preserving and managing ecosystems
C)both A and B
3
Which of the following ethical principles is supported by conservation biology?
A)extinctions due to human actions are acceptable
B)ecosystems should be simplified so they are more manageable
C)biodiversity is desirable for the biosphere and humans
D)all of the above
4
Currently more extinctions are occurring in a short period of time than at any time in the history of the earth.
A)True
B)False
5
It is estimated that in the next 20-50 years _____ of all species now living will become extinct unless action is taken.
A)1%
B)10-20%
C)50-60%
D)90-95%
6
Conservation biologists often work closely with local and federal government officials.
A)True
B)False
7
All species on the earth have been found and classified.
A)True
B)False
8
The most prevalent group of organisms of the species which have been described so far is _____.
A)primates
B)flowering plants
C)fish
D)insects
9
Biodiversity is affected by _____ diversity.
A)landscape
B)genetic
C)community
D)all of the above
10
The Irish potato blight would not have been as severe if the potatoes had more genetic diversity.
A)True
B)False
11
A number of interacting ecosystems is referred to as a _____.
A)community
B)landscape
C)panorama
D)domain
12
About _____ of the earth's species are located in areas called biodiversity hotspots.
A)5%
B)20%
C)75%
D)90%
13
Which of the following is a biodiversity hotspot?
A)Madagascar
B)Alaska
C)Galapagos Islands
D)none of the above
14
It has recently been discovered that the deep sea benthos has many more species than previously thought.
A)True
B)False
15
A habitat corridor _____.
A)connects patches of ecosystems
B)may help preserve animals that migrate between different ecosystems in a landscape
C)both A and B
16
Habitat corridors maintain genetic diversity by promoting gene flow.
A)True
B)False
17
Regions of the world with an unusually large concentration of species are called _____.
A)nature preserves
B)cloud forests
C)landscapes
D)biodiversity hotspots
18
Biodiversity is highest _____.
A)at the poles
B)at the tropics
19
Community disruption tends to affect only one species.
A)True
B)False
20
A population that has limited _____ diversity is much more likely to become extinct.
A)genetic
B)community
C)landscape
21
A conservation biologist would _____.
A)work with government officials to establish a plan for the protection of endangered species
B)analyze organism characteristics that help them survive in particular locations
C)investigate the impact of industrial pollutants on an ecosystem
D)all of the above
22
Which of the following has provided us with a cure or treatment for some disease?
A)rosy periwinkle
B)horseshoe crabs
C)penicillium mold
D)all of the above
23
Hodgkin's disease is usually curable and the survival rate for childhood leukemia has increased from 10% to 90% thanks to chemicals from the rosy periwinkle.
A)True
B)False
24
Biodiversity is of little monetary value to humans.
A)True
B)False
25
Which of the following is true of agricultural crops?
A)the same high-yield, genetically similar strains tend to be grown worldwide
B)wild plants often have genes for resistance to viruses that cultivated plants lack
C)cultivated plants have less genetic diversity than wild plants
D)all of the above
26
Crop yield has decreased because of a mite infestation of the domestic honeybee.
A)True
B)False
27
A species-rich forest in the Amazon is worth far more if the forest is used for timber production rather than fruit and rubber production.
A)True
B)False
28
Natural predators and parasites are not as effective for controlling biological pests as chemical pesticides.
A)True
B)False
29
A direct value of biodiversity to humans is _____.
A)new medicines for treatment of diseases
B)waste disposal
C)climate regulation
D)prevention of soil erosion
30
Research testing the benefits of biodiversity in a Minnesota grassland habitat showed _____.
A)more diverse plots used fewer resources
B)less diverse plots had lower concentrations of inorganic soil nitrogen
C)greater diversity improved ecosystem performance
D)all of the above
31
Which of the following will exhibit more photosynthesis?
A)a forest of maple, beech, oak, birch, walnut, hickory, willow, and ash trees.
B)a forest of maple trees
32
Soil erosion _____.
A)increases following deforestation
B)is decreasing the productivity of estuaries
C)both A and B
33
Water purification and dilution of toxins is performed by a _____.
A)tundra
B)wetland
C)estuary
D)coniferous forest
34
Trees regulate the climate by using carbon dioxide for photosynthesis.
A)True
B)False
35
Deforestation tends to offset the rise in carbon dioxide.
A)True
B)False
36
The value of biodiversity to humans is obvious and fully appreciated by all people.
A)True
B)False
37
In the United States the cause of most species' extinctions is _____.
A)disease
B)pollution
C)habitat loss
D)alien species
38
Habitat loss is the result of _____.
A)slash and burn agriculture in rainforests
B)timber production
C)mining
D)all of the above
39
Habitat loss is a concern only for terrestrial species.
A)True
B)False
40
Once the rainforest trees are burned down the soil is very rich and able to support agricultural efforts for an infinite number of years.
A)True
B)False
41
Alien species _____.
A)migrate to new locations on their own
B)are incorporated into food webs without adverse effect
C)proliferate because they lack predators
D)all of the above
42
Which of the following is an alien species that was introduced to the United States?
A)zebra mussel
B)dandelion
C)kudzu
D)all of the above
43
When you travel overseas you are prohibited from bringing agricultural products into the United States with you because of the risk of introducing an alien species.
A)True
B)False
44
Alien species are especially disruptive when introduced to an island.
A)True
B)False
45
Alien species are introduced into new ecosystems when humans ______.
A)use them for landscaping
B)colonize new places
C)travel
D)all of the above
46
Alien species experience _____ when introduced to a new ecosystem.
A)extinction
B)exponential growth
C)secondary succession
D)character displacement
47
Pollution directly causes extinctions and can also indirectly cause extinction by making organisms more susceptible to disease.
A)True
B)False
48
Over enrichment of a lake results in _____.
A)ozone depletion
B)eutrophication
C)acid rain
D)global warming
49
The breakdown of chlorofluorocarbons results in chlorine atoms which cause _____.
A)ozone depletion
B)eutrophication
C)acid rain
D)global warming
50
Acid deposition _____.
A)is only a problem where sulfur dioxide and nitrogen oxide are emitted
B)occurs when sulfur dioxide and nitrogen oxide combine with water to produce acids
C)stimulates the growth of plants that prefer acid soil
D)all of the above
51
Nonylphenols _____.
A)harm wildlife by mimicking hormones
B)cause lake eutrophication
C)deplete the ozone layer
D)are contributing to global warming
52
UV radiation _____.
A)is usually absorbed by the ozone layer
B)weakens the immune system
C)kills off plankton
D)all of the above
53
The ozone shield is in the troposphere.
A)True
B)False
54
Coral reefs _____.
A)may "drown" if sea levels rise as a result of global warming
B)thrive when the temperature of the water increases
C)are resistant to diseases
D)all of the above
55
Bleached coral reefs are caused by an increase in water temperature.
A)True
B)False
56
Global warming is caused by _____.
A)consumption of fossil fuels
B)deforestation
C)methane production
D)all of the above
57
Which is associated with air pollution?
A)global warming
B)destruction of the ozone shield
C)acid deposition
D)all of the above
58
Overfishing of one or two species of fish affects only those species of fish being harvested.
A)True
B)False
59
The overfishing of perch and herring resulted in _____.
A)a decline in the seals and sea lions that eat perch and herring
B)exponential growth of sea urchins which are usually consumed by sea otters
C)increased consumption of sea otters by orcas in lieu of seals and sea lions
D)all of the above
60
If harvesting does not exceed the ability of fish to reproduce fish are a _____ resource.
A)non-renewable
B)renewable
61
Which of the following species has experienced overexploitation?
A)Siberian tigers
B)saguaro cactus
C)haddock
D)all of the above
62
The marine equivalent of clear cutting rainforests is _____.
A)purse-seine fishing
B)trawling
63
Purse-seine fishing often captures and kills dolphins as well as fish.
A)True
B)False
64
Endemic species are _____.
A)found in every ecosystem
B)found in one particular location
C)aquatic organisms
D)terrestrial organisms
65
Keystone species _____.
A)are the most numerous in a community
B)are producers
C)greatly influence the viability of the community
D)can be removed from a community without affecting other species
66
Which of the following would be designated a keystone species?
A)alligators
B)grizzlies
C)elephants
D)all of the above
67
Fewer seeds are dispersed when bats in an Old World tropical rainforest are killed off.
A)True
B)False
68
A population that lives in a favorable area and has a birth rate higher than the death rate is called a _____ population.
A)meta
B)source
C)sink
69
The birth rate and death rate are roughly equivalent in a sink population.
A)True
B)False
70
The movement of individuals from a source population to a sink population. It is not always beneficial to the sink population.
A)True
B)False
71
Landscape protection for one species often benefits other species that share the same space.
A)True
B)False
72
The maintenance of grizzly bear populations depends on _____.
A)creating and preserving habitat corridors
B)increasing the number of prey available to grizzlies
C)keeping several small grizzly populations isolated
D)all of the above
73
Which of the following statements about the edge effect is true?
A)all areas of an ecosystem are exactly the same
B)a small and large patch have different amounts of edge
C)the edges around a patch have a slightly different habitat than the interior of a patch
D)none of the above
74
When determining population viability, researchers must know _____.
A)the minimum population size to prevent extinction
B)the size needed to maintain genetic diversity
C)life history characteristics of the population
D)all of the above
75
How much habitat a species requires to maintain itself can be determined by doing a _____ analysis.
A)gap
B)population viability
76
Part of the restoration plan for the Florida Everglades involves flooding of the Everglades Agricultural Area.
A)True
B)False
77
Restoration of ecosystems to their natural state must begin as soon as possible before sources of wildlife and seeds from which to restock the restored habitat are lost forever.
A)True
B)False
78
Which of the following is a goal of restoration ecology?
A)mimic natural processes to bring about restoration
B)find new species with which to restock damaged ecosystems
C)remove humans from the most severely damaged ecosystems
D)all of the above





To learn more about the book this website supports, please visit its Information Center.
(c)2004 McGraw-Hill Higher Education
Any use is subject to the Terms of Use and Privacy Policy.
McGraw-Hill Higher Education is one of the many fine businesses of The McGraw-Hill Companies.


BiologyOnline Learning Center with Powerweb

Home > Chapter 50 > Multiple Choice Quiz