Question 1

Which is NOT an example of a major human alteration to the global nitrogen cycle?

Accepted Answer

A)  animal waste from agriculture 
B)  combustion of fossil fuels 
C)  production of nitrogen fertilizers 
D)  planting of nitrogen-fixing crops 
A)  animal waste from agriculture 
B)  combustion of fossil fuels 
C)  production of nitrogen fertilizers 
D)  planting of nitrogen-fixing crops

Question 2

Denitrification is described by

Accepted Answer

A)  NO $\rightarrow$ N2O $\rightarrow$ N2. 
B)  N2O $\rightarrow$ NO $\rightarrow$N2. 
C)  NO $\rightarrow$N2 $\rightarrow$N2O. 
D)  N2 $\rightarrow$ NO $\rightarrow$N2O. 
E)  N2 $\rightarrow$ N2O $\rightarrow$ NO. 
A)  NO $\rightarrow$ N2O $\rightarrow$ N2. 
B)  N2O $\rightarrow$ NO $\rightarrow$N2. 
C)  NO $\rightarrow$N2 $\rightarrow$N2O. 
D)  N2 $\rightarrow$ NO $\rightarrow$N2O. 
E)  N2 $\rightarrow$ N2O $\rightarrow$ NO.

Question 3

In the study of leaf decomposition in a stream in Germany using leaf litter enclosed in either fine- or large-mesh bags, researchers found that decomposition was strongly affected by

Accepted Answer

A)  invertebrates and lignin content. 
B)  vertebrates and lignin content. 
C)  nitrogen and phosphorus. 
D)  lignin and phosphorus. 
A)  invertebrates and lignin content. 
B)  vertebrates and lignin content. 
C)  nitrogen and phosphorus. 
D)  lignin and phosphorus.

Question 4

What is the largest pool of water on Earth?

Accepted Answer

A)  wetlands 
B)  underground aquifers 
C)  oceans 
D)  lakes 
E)  glaciers 
A)  wetlands 
B)  underground aquifers 
C)  oceans 
D)  lakes 
E)  glaciers

Question 5

From 1958 to 2017, atmospheric carbon dioxide measurements at Mauna Loa have risen approximately

Accepted Answer

A)  35 percent. 
B)  10 percent. 
C)  15 percent. 
D)  28 percent. 
E)  55 percent. 
A)  35 percent. 
B)  10 percent. 
C)  15 percent. 
D)  28 percent. 
E)  55 percent.

Question 6

Leaf litter with a _____ lignin composition should _____ k (the daily rate of mass loss).

Accepted Answer

A)  high; increase 
B)  high; decrease 
C)  low; see no change in the value of 
D)  low; decrease 
A)  high; increase 
B)  high; decrease 
C)  low; see no change in the value of 
D)  low; decrease

Question 7

Which organisms are primarily responsible for terrestrial decomposition?

Accepted Answer

A)  bacteria and insects 
B)  fungi and insects 
C)  detritivores and fungi 
D)  bacteria and fungi 
A)  bacteria and insects 
B)  fungi and insects 
C)  detritivores and fungi 
D)  bacteria and fungi

Question 8

When discussing nutrients within a stream ecosystem, those materials (i.e., leaves and other plant parts) that enter the stream from the surrounding terrestrial environment are termed

Accepted Answer

A)  regenerative. 
B)  autochthonous. 
C)  allochthonous. 
D)  biorestorative. 
A)  regenerative. 
B)  autochthonous. 
C)  allochthonous. 
D)  biorestorative.

Question 9

Denitrification occurs under _____ conditions.

Accepted Answer

A)  aerobic 
B)  anaerobic 
C)  both aerobic and anaerobic 
D)  neither aerobic nor anaerobic 
A)  aerobic 
B)  anaerobic 
C)  both aerobic and anaerobic 
D)  neither aerobic nor anaerobic

Question 10

Phosphatizing bacteria convert phosphorus compounds into

Accepted Answer

A)  phosphate ions. 
B)  phosphite ions. 
C)  calcium phosphate. 
D)  phosphoric acid. 
A)  phosphate ions. 
B)  phosphite ions. 
C)  calcium phosphate. 
D)  phosphoric acid.

Question 11

What is the ultimate destination of water in the hydrologic cycle?

Accepted Answer

A)  deep aquifers 
B)  oceans 
C)  lakes, rivers, and streams 
D)  the atmosphere 
A)  deep aquifers 
B)  oceans 
C)  lakes, rivers, and streams 
D)  the atmosphere

Which is NOT an example of a major human alteration to the global nitrogen cycle?

Denitrification is described by

In the study of leaf decomposition in a stream in Germany using leaf litter enclosed in either fine- or large-mesh bags, researchers found that decomposition was strongly affected by

What is the largest pool of water on Earth?

From 1958 to 2017, atmospheric carbon dioxide measurements at Mauna Loa have risen approximately

Leaf litter with a _ lignin composition should _ k (the daily rate of mass loss).

Which organisms are primarily responsible for terrestrial decomposition?

When discussing nutrients within a stream ecosystem, those materials (i.e., leaves and other plant parts) that enter the stream from the surrounding terrestrial environment are termed

Denitrification occurs under _____ conditions.

Phosphatizing bacteria convert phosphorus compounds into

What is the ultimate destination of water in the hydrologic cycle?

Introduction: Ecology, Evolution, and the Scientific Method

Adaptations to Aquatic Environments

Adaptations to Terrestrial Environments

Adaptations to Variable Environments

Climates and Soils

Terrestrial and Aquatic Biomes

Evolution and Adaptation

Life Histories

Reproductive Strategies

Social Behaviors

Population Distributions

Population Growth and Regulation

Population Dynamics Over Space and Time

Predation and Herbivory

Parasitism and Infectious Diseases

Competition

Mutualism

Community Structure

Community Succession

Movement of Energy in Ecosystems

Landscape Ecology and Global Biodiversity

Global Conservation of Biodiversity

Filters

Exam 21: Movement of Elements in Ecosystems

Which is NOT an example of a major human alteration to the global nitrogen cycle?

Denitrification is described by

In the study of leaf decomposition in a stream in Germany using leaf litter enclosed in either fine- or large-mesh bags, researchers found that decomposition was strongly affected by

What is the largest pool of water on Earth?

From 1958 to 2017, atmospheric carbon dioxide measurements at Mauna Loa have risen approximately

Leaf litter with a _____ lignin composition should _____ k (the daily rate of mass loss).

Which organisms are primarily responsible for terrestrial decomposition?

When discussing nutrients within a stream ecosystem, those materials (i.e., leaves and other plant parts) that enter the stream from the surrounding terrestrial environment are termed

Denitrification occurs under _____ conditions.

Phosphatizing bacteria convert phosphorus compounds into

What is the ultimate destination of water in the hydrologic cycle?

Introduction: Ecology, Evolution, and the Scientific Method

Adaptations to Aquatic Environments

Adaptations to Terrestrial Environments

Adaptations to Variable Environments

Climates and Soils

Terrestrial and Aquatic Biomes

Evolution and Adaptation

Life Histories

Reproductive Strategies

Social Behaviors

Population Distributions

Population Growth and Regulation

Population Dynamics Over Space and Time

Predation and Herbivory

Parasitism and Infectious Diseases

Competition

Mutualism

Community Structure

Community Succession

Movement of Energy in Ecosystems

Landscape Ecology and Global Biodiversity

Global Conservation of Biodiversity

Filters

Leaf litter with a _ lignin composition should _ k (the daily rate of mass loss).