accumulate in the tissues of organisms.

Habitats with many edges

often result from human activities.

According to this figure, which organisms have the highest concentration of PCBs, and why?

herring gulls, because they are at the top of the food chain

Currently, the single greatest threat to biodiversity is

habitat destruction due to humans.

Biodiversity considers

the genetic diversity within and between populations of a species.

The primary goal of conservation biology is to

counter the loss of biodiversity.

The three greatest current threats to biodiversity, in order starting with the greatest, are

habitat loss, invasive species, and overharvesting.

Protecting the endangered black-footed ferret from extinction involved

captive breeding and reintroduction.

The introduction of wolves into Yellowstone National Park in 1991 resulted in

ecological changes involving numerous plant and animal species.

Sustainable development will

require global, multinational cooperation.

If wolves were now removed from Yellowstone National Park,

elk populations would increase.

The Kissimmee River Restoration Project is an

attempt to restore the natural wetlands associated with the Kissimmee River

The Yellowstone to Yukon Conservation Initiative is a plan to

connect parks in US &Canada with corridors where wildlife can travel safely

As global temperatures continue to rise, what is a likely outcome?

loss of populations of polar fish species

Which phenomenon is a likely consequence of thinning of the ozone layer?

more occurrences of skin cancer

Global warming is the result of

rising concentrations of greenhouse gases.

The Kissimmee River Restoration Project is intended to

increase biodiversity of the region.

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BIOL II Chapter 38

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Questions 36

Answers

1
Fragmentation can occur due to natural processes. Which natural process would most likely create a fragmented ecosystem?
thunderstorm
blizzard
glacier melting
volcanic eruption
2
Small areas that are home to a large number of threatened species & concentration of species found nowhere else on Earth
biomes.
movement corridors.
local populations.
biodiversity hot spots.
3
DDT and mercury
contribute to acid precipitation.
deplete the ozone layer.
were once used as an energy source.
accumulate in the tissues of organisms.
4
Habitats with many edges
often result from human activities.
favor animals that prefer interior, forest habitat.
are the result of natural disasters.
result in a significant increase in ecotourism.
5
A regional assemblage of interacting ecosystems is a
biome.
landscape.
hot spot.
corridor.
6
Most biodiversity hot spots are found in ________ regions.
western
tropical
tundra
temperate
7
Greenhouse gases include
nitrogen and oxygen.
nitrous oxide and oxygen.
carbon dioxide and nitrogen.
carbon dioxide and methane.
8
According to this figure, which organisms have the highest concentration of PCBs, and why?
phytoplankton, because they are at the bottom of the food chain
smelt, because they are in the middle of the food chain
herring gulls, because they are at the top of the food chain
herring gulls, because they are at the bottom of the food chain
9
The average global temperature has risen ________ over the past 100 years.
5°C
10°C
3°C
1°C
10
What is likely to be the greatest challenge facing the zoned reserve systems of Costa Rica?
decreasing soil erosion
high predation by jaguars
the impossibility of ecotourism
a growing human population
11
Which species is an invasive species?
brown pelican off the coast of Louisiana
brown tree snake in Guam
polar bear in Norway
pika in the western United States
12
Currently, the single greatest threat to biodiversity is
overexploitation of populations for food.
habitat destruction due to humans.
global warming.
the introduction of exotic species.
13
Biodiversity considers
the relationships of individuals to a food chain.
commensal relationships between species.
the genetic diversity within and between populations of a species.
the fate of water in an ecosystem.
14
The primary goal of conservation biology is to
counter the loss of biodiversity.
estimate the total number of species that exist.
integrate human culture back into nature.
maximize the land set aside for wildlife.
15
The three greatest current threats to biodiversity, in order starting with the greatest, are
habitat loss, invasive species, and overharvesting.
invasive species, habitat loss, and overharvesting.
invasive species, overharvesting, and habitat loss.
habitat loss, overharvesting, and invasive species.
16
Protecting the endangered black-footed ferret from extinction involved
vaccinating the remaining population against sylvatic plague.
collecting from many small populations & combining into large population
captive breeding and reintroduction.
providing food during harsh winters.
17
The introduction of wolves into Yellowstone National Park in 1991 resulted in
ecological changes involving numerous plant and animal species.
a decline in habitat for the entire community.
the death of all of the wolves, likely due to insufficient amount of prey.
the migration of most of these wolves out of the park and back to Canada.
18
populations, with high genetic variability & short life spans, may avoid extinction as the climate changes through
distribution of populations.
biological magnification.
bioprospecting
evolutionary adaptation.
19
Sustainable development will
require global, multinational cooperation.
speed up evolution.
require making difficult decisions regarding travel to other planets.
require many people to contribute financially.
20
If wolves were now removed from Yellowstone National Park,
deer populations would decrease.
vegetation would increase, providing shelter for smaller animals.
the vegetation would remain unchanged.
elk populations would increase.
21
If trends in global warming continue for next 50 yrs, where will the greatest effects of global warming likely be felt?
the continental United States
the Mississippi River
the Pacific Ocean
Russia
22
One way in which distributions of populations and species have been responding to climate change is by shifting
toward the poles.
to lower elevations.
toward the equator.
23
The Kissimmee River Restoration Project is an
attempt to restore the natural wetlands associated with the Kissimmee River
effort to join two previously unconnected lakes to permit better drainage.
example of a dam that interrupted the breeding of salmon and other species.
example of large-scale bioremediation to clean up a mercury spill.
24
The Yellowstone to Yukon Conservation Initiative is a plan to
connect all of the national parks in the United States.
create a giant,fenced private land area between national parks in the US
connect parks in US &Canada with corridors where wildlife can travel safely
connect all of the national parks in the western United States.
25
As global temperatures continue to rise, what is a likely outcome?
greater overharvesting of medicinal plant species
formation of new glaciers
loss of populations of polar fish species
less greenhouse gas emissions
26
Using living organisms to clean up polluted ecosystems is known as
bioremediation
migration.
restoration ecology.
landscaping
27
Which phenomenon is a likely consequence of thinning of the ozone layer?
greater escape of heat from Earth
more occurrences of skin cancer
global warming
smaller flying insect populations
28
The current rate of extinction may be as much as ________ times greater than the natural rate of extinction.
10
100
10,000
1,000
29
The aspect of conservation ecology concerned with returning degraded ecosystems to their closest natural state is
restoration ecology.
landscape ecology.
bioremediation
sustainable development.
30
About one-third of all animal and plant species are concentrated on ________ of Earth's land.
20%
10%
5%
1.5%
31
Global warming is the result of
rising ocean levels.
habitat loss.
rising concentrations of greenhouse gases.
increased solar activity.
32
Species found in only one place on Earth are called ________ species.
endemic
hot spot
keystone
exotic
33
in the atmosphere is absorbed by ________ and converted into biomass.
photosynthetic organisms
the ozone layer
other atmosphere gases
large land masses
34
A wolf species once common to southeastern region of the US disappeared from all areas except eastTX.This is example of
extinction
extirpation
species invasion.
genetic diversity.
35
The ability to change phenotype in response to local environmental conditions is called
alternation of generations.
mutation.
genetic drift.
phenotpic plasticity.
36
The Kissimmee River Restoration Project is intended to
drain natural wetlands in the central Florida region.
increase biodiversity of the region.
restrict ecotourism and other recreational usage in the impacted region.
provide areas for homes and businesses.

BIOL II Chapter 38 Flashcards | StudBud