Question 1

Negative feedback processes tend to function within ecosystems to _____________.

Accepted Answer

A)  cause further ecological destruction
B)  stabilize the ecosystem
C)  cause ecological relationships to disintegrate
D)  cause ecological relationships to flourish
E)  reinforce harmful changes

Question 2

Which of the following is the best example of an ecosystem service?

Accepted Answer

A)  a park ranger checking fishing licenses
B)  the regulation of gas prices
C)  a college environmental club cleaning up the shoulder of a highway
D)  soil microbes fixing atmospheric nitrogen
E)  a city cutting down a tree that is dying

Question 3

Use the accompanying figure to answer the following question.
-This graph helps to explain ______________ .

Accepted Answer

A)  why we need to be concerned with damage to rainforests and coral reefs
B)  why cultivated lands are a logical choice to replace rainforests
C)  why the open ocean is so productive
D)  why tundra has such high net primary productivity of biomass
E)  the importance of deserts

Question 4

The three largest pools of the carbon cycle,in order,are _____________.

Accepted Answer

A)  sedimentary rock,the atmosphere,and plants
B)  oceans,sedimentary rock,and respiration
C)  freshwater streams,the atmosphere,and plants
D)  fertilizers,plants,and the atmosphere
E)  sedimentary rock,oceans,and fossil fuels

Question 5

Use the accompanying figure to answer the following question.
-Overall,it appears that terrestrial biomes with more available fresh water ______________ .

Accepted Answer

A)  tend to have less productivity than those without much fresh water
B)  don't differentiate between fresh water as rainfall and fresh water as ice in glaciers
C)  tend to have about the same productivity as those without much fresh water
D)  tend to have more productivity than those without much fresh water
E)  No real conclusions can be drawn.

Question 6

You are studying with a classmate,who explains that increasing the amount of nutrients in a lake helps submerged,rooted aquatic plants by providing them with the nitrogen and phosphorus they need to survive and reproduce.Which of the following should be your response to your study buddy?

Accepted Answer

A)  You disagree because the resulting increase in phytoplankton at the surface would inhibit sunlight from penetrating into the water,thus inhibiting photosynthesis in the submerged plants.
B)  You agree and point out that plants also benefit because the decrease in oxygen will kill aquatic fish and snails,some of which would otherwise eat the aquatic plants.
C)  You agree because all organisms need nitrogen and phosphorus,and waterways are naturally limited in those nutrients.
D)  You disagree and explain that plants cannot use the nutrients in the water because the plants do not have access to the nutrients.
E)  You agree and point out that the resulting fish kill would further enhance the nitrogen and phosphorus levels in the lake,which would further enhance the growth of submerged aquatic plants,creating a positive feedback loop.

Question 7

In an aquatic ecosystem experiencing eutrophication,levels of dissolved macronutrients and dissolved oxygen levels _____________.

Accepted Answer

A)  increase; increase
B)  remain stable; increase
C)  increase; decease
D)  decrease; increase
E)  decrease; decrease

Question 8

Use the accompanying figure to answer the following question.
-Recall that areas with high net primary productivity not only produce high levels of biomass rapidly,they also take up large amounts of CO2 and give off large amounts of oxygen.What is the likely result of the increasing amounts of fertilizers in the major rivers emptying into oceans?

Accepted Answer

A)  Eutrophication,followed by hypoxia,is a likely result,ultimately leading to more CO2 uptake and more oxygen released.
B)  Eutrophication,followed by hypoxia,is a likely result,ultimately leading to less CO2 uptake and more oxygen released.
C)  Fisheries will improve as the extra nutrients feed shellfish and fish.
D)  Productivity in these areas will increase permanently,leading to more CO2 uptake and more oxygen released.
E)  Eutrophication,followed by hypoxia,is a likely result,ultimately leading to less CO2 uptake and less oxygen released.

Question 9

Human activity has affected every aspect of the nitrogen cycle.List the ways that humans have altered nitrogen content starting with how nitrogen becomes available to producers,where it goes,and what impacts it has.What are the ecological concerns regarding the dramatic changes people have made in the global nitrogen cycle?

Accepted Answer

Humans have spent a great deal of money ...

Question 10

The majority of Earth's fresh water exists ______________

Accepted Answer

A)  in groundwater
B)  in the form of ice
C)  in the atmosphere
D)  in freshwater lakes,streams,and rivers
E)  in the oceans

Question 11

What factors contribute to the "dead zone" in Chesapeake Bay?

Accepted Answer

There has been a rapid acceleration of a...

Question 12

A system stabilized by negative feedback,with opposing processes offsetting each other,is said to be in ______________ .

Accepted Answer

A)  environmental balance
B)  harmonic resonance
C)  static control
D)  normal balance
E)  dynamic equilibrium

Question 13

The first essential step in changing atmospheric nitrogen into more usable NH3 is called ______________

Accepted Answer

A)  nitrification
B)  denitrification
C)  ammonification
D)  biogeochemical cycling
E)  nitrogen fixation

Question 14

Biodiversity is partially influenced by net primary productivity (NPP) .Where can the highest terrestrial rates of NPP be found?

Accepted Answer

A)  polar regions
B)  tundra
C)  deserts
D)  tropical rainforests
E)  deciduous forests

Question 15

-Which location on the map has the highest net primary productivity?

Accepted Answer

A)  A
B)  B
C)  C
D)  D
E)  E

Question 16

All of the following are fluxes in the hydrologic cycle EXCEPT _____________.

Accepted Answer

A)  infiltration
B)  uptake
C)  transpiration
D)  evaporation
E)  fixation

Question 17

All of the following are considered Earth's structural spheres EXCEPT ______________

Accepted Answer

A)  geosphere
B)  lithosphere
C)  atmosphere
D)  hydrosphere
E)  biosphere

Exam 5: Environmental Systems and Ecosystem Ecology

A system stabilized by negative feedback,with opposing processes offsetting each other,is said to be in ______________ .

Correct Answer
verified

Which of the following is the best example of an ecosystem service?

Correct Answer
verified

Negative feedback processes tend to function within ecosystems to _____________.

Correct Answer
verified

The three largest pools of the carbon cycle,in order,are _____________.

Correct Answer
verified

What factors contribute to the "dead zone" in Chesapeake Bay?

Correct Answer
verified
There has been a rapid acceleration of a...
View Answer

Correct Answer
verified
Humans have spent a great deal of money ...
View Answer

-Which location on the map has the highest net primary productivity?

Correct Answer
verified

In an aquatic ecosystem experiencing eutrophication,levels of dissolved macronutrients and dissolved oxygen levels _____________.

Correct Answer
verified

The majority of Earth's fresh water exists ______________

Correct Answer
verified

You are studying with a classmate,who explains that increasing the amount of nutrients in a lake helps submerged,rooted aquatic plants by providing them with the nitrogen and phosphorus they need to survive and reproduce.Which of the following should be your response to your study buddy?

Correct Answer
verified

Use the accompanying figure to answer the following question. -This graph helps to explain ______________ .

Correct Answer
verified

All of the following are fluxes in the hydrologic cycle EXCEPT _____________.

Correct Answer
verified

Correct Answer
verified

The first essential step in changing atmospheric nitrogen into more usable NH₃ is called ______________

Correct Answer
verified

Biodiversity is partially influenced by net primary productivity (NPP) .Where can the highest terrestrial rates of NPP be found?

Correct Answer
verified

All of the following are considered Earth's structural spheres EXCEPT ______________

Correct Answer
verified

Use the accompanying figure to answer the following question. -Overall,it appears that terrestrial biomes with more available fresh water ______________ .

Correct Answer
verified

Exam 5: Environmental Systems and Ecosystem Ecology

A system stabilized by negative feedback,with opposing processes offsetting each other,is said to be in ______________ .

Correct AnswerverifiedShow Answer

Which of the following is the best example of an ecosystem service?

Correct AnswerverifiedShow Answer

Negative feedback processes tend to function within ecosystems to _____________.

Correct AnswerverifiedShow Answer

The three largest pools of the carbon cycle,in order,are _____________.

Correct AnswerverifiedShow Answer

What factors contribute to the "dead zone" in Chesapeake Bay?

Correct AnswerverifiedThere has been a rapid acceleration of a...View AnswerShow Answer

Correct AnswerverifiedHumans have spent a great deal of money ...View AnswerShow Answer

-Which location on the map has the highest net primary productivity?

Correct AnswerverifiedShow Answer

In an aquatic ecosystem experiencing eutrophication,levels of dissolved macronutrients and dissolved oxygen levels _____________.

Correct AnswerverifiedShow Answer

The majority of Earth's fresh water exists ______________

Correct AnswerverifiedShow Answer

You are studying with a classmate,who explains that increasing the amount of nutrients in a lake helps submerged,rooted aquatic plants by providing them with the nitrogen and phosphorus they need to survive and reproduce.Which of the following should be your response to your study buddy?

Correct AnswerverifiedShow Answer

Use the accompanying figure to answer the following question. -This graph helps to explain ______________ .

Correct AnswerverifiedShow Answer

All of the following are fluxes in the hydrologic cycle EXCEPT _____________.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

The first essential step in changing atmospheric nitrogen into more usable NH3 is called ______________

Correct AnswerverifiedShow Answer

Biodiversity is partially influenced by net primary productivity (NPP) .Where can the highest terrestrial rates of NPP be found?

Correct AnswerverifiedShow Answer

All of the following are considered Earth's structural spheres EXCEPT ______________

Correct AnswerverifiedShow Answer

Use the accompanying figure to answer the following question. -Overall,it appears that terrestrial biomes with more available fresh water ______________ .

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
verified
There has been a rapid acceleration of a...
View Answer

Correct Answer
verified
Humans have spent a great deal of money ...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

The first essential step in changing atmospheric nitrogen into more usable NH₃ is called ______________

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified