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chapter 5 quiz 1 blog version
Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
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1. Which of the following tells you population density?
a. the number of births per year
b. the number of frogs in a pond
c. the number of deaths per year
d. the number of bacteria per square millimeter
2. When organisms move out of the population, this is known as
a. emigration.
c. immigration.
b. abandonment.
d. succession.
3. What must occur in a population for it to grow?
a. The birthrate becomes higher than the death rate.
b. The birthrate stays the same and the death rate increases.
c. The birthrate becomes lower than the death rate.
d. The birthrate and the death rate remain the same.
4. Which are two ways a population can decrease in size?
a. immigration and emigration
c. decreased birthrate and emigration
b. increased death rate and immigration
d. emigration and increased birthrate
5. The various growth phases through which most populations go are represented on a(an)
a. logistic growth curve.
c. normal curve.
b. exponential growth curve.
d. population curve.
6. As resources in a population become less available, the population
a. declines rapidly.
c. reaches carrying capacity.
b. increases slowly.
d. enters a phase of exponential growth.
7. Which factor might NOT contribute to an exponential growth rate in a given population?
a. lower death rates
c. less competition
b. higher birthrates
d. reduced resources
8. When the exponential phase of a logistic growth curve of a population ceases,
a. the size of the population drops.
b. the size of the population stays the same.
c. population growth begins to slow down.
d. population growth begins to speed up.
9. A biotic or an abiotic resource in the environment that causes population size to decrease is a
a. carrying capacity.
c. limiting factor.
b. limiting nutrient.
d. growth factor.
10. All of the following are limiting factors EXCEPT
a. immigration.
c. predation.
b. competition.
d. human disturbances.
11. Which of the following is NOT likely to be a limiting factor on the sea otter population?
a. disease
c. drought
b. competition
d. predation
12. Which density-dependent factors other than the predator/prey relationship affected the
populations of moose and wolves on Isle Royale?
a. extreme temperatures for the moose and flooding for the wolves
b. parasitic wasps for the wolves and clear-cut forest for the moose
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c. a hurricane followed by drought for both moose and wolves
d. food availability for the moose and disease for the wolf
Human population growth has slowed down in
a. China.
c. India.
b. the United States.
d. Africa.
Demography is the scientific study of
a. parasitism and disease.
c. human populations.
b. modernized countries.
d. none of the above
In countries like India, the human population is growing
a. exponentially.
c. logistically.
b. transitionally.
d. demographically.
Imported plants in Hawaii have
a. crowded out many native species.
c. introduced diseases.
b. reduced the native bird species.
d. depleted natural resources.
Early hunters and gatherers in North America may have been 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.
An environmental problem that resulted from the green revolution was
a. overpopulation.
c. starvation.
b. failed crops.
d. depleted water supplies.
An old-growth forest is
a. a renewable resource.
c. a microclimate.
b. a nonrenewable resource.
d. poor in biodiversity.
A resource, such as air or parts of the oceans, that is open to anyone is often preserved and
protected by
a. international organizations.
c. the country in which it is located.
b. everyone.
d. no one.
The sulfur and nitrogen compounds in smog combine with water to form
a. ozone.
c. acid rain.
b. ammonia.
d. chlorofluorocarbons.
Biodiversity is important to human society because it
a. is a natural resource.
c. provides medicines.
b. provides food and goods.
d. all of the above
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.
Human well-being is tied to biodiversity because
a. humans love to look at beautiful things.
b. humans are part of the food webs and energy cycles that a great variety of organisms
share.
c. less biodiversity makes humans vulnerable to extinction.
d. humans need a wide variety of animal species for hunting and wildlife products.
An endangered species is
a. a diseased animal.
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b. a dangerous predator.
c. a group of organisms in danger of extinction.
d. all organisms at the top of a food chain.
One of the greatest threats today to biological diversity is
a. old-growth forests.
c. habitat destruction.
b. ozone depletion.
d. monoculture.
As DDT moves up the trophic levels in food chains, or food webs, its concentration
a. stays the same.
c. decreases.
b. increases.
d. is eliminated.
The goals of conservation biology include all of the following EXCEPT
a. wise management of natural resources.
b. introducing foreign species into new environments.
c. preservation of habitats and wildlife.
d. protection of biodiversity.
Protecting ecosystem diversity is a goal of
a. the green revolution.
c. the captive breeding program.
b. conservation biology.
d. the United Nations.
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.
c. global warming.
b. ozone depletion.
d. particulate dispersal.