Question 1

The end product of biological nitrogen fixation is

Accepted Answer

A)  N2. 
B)  NO3-. 
C)  NO2-. 
D)  NH3. 
E)  None of the choices are correct. 
A)  N2. 
B)  NO3-. 
C)  NO2-. 
D)  NH3. 
E)  None of the choices are correct.

Question 2

The release of nutrients from organic material in inorganic form is called _____________.

Accepted Answer

The answer of The release of nutrients from organic material...

Question 3

Pocket gophers change the nitrogen cycle in prairies because they

Accepted Answer

A)  excavate nitrogen-rich subsoil to the surface. 
B)  selectively remove nitrogen-fixing legumes from plant communities. 
C)  bury nitrogen-rich organic material in their burrows. 
D)  cultivate nitrogen-fixing bacteria in burrow chambers. 
E)  excavate nitrogen-poor subsoil to the surface. 
A)  excavate nitrogen-rich subsoil to the surface. 
B)  selectively remove nitrogen-fixing legumes from plant communities. 
C)  bury nitrogen-rich organic material in their burrows. 
D)  cultivate nitrogen-fixing bacteria in burrow chambers. 
E)  excavate nitrogen-poor subsoil to the surface.

Question 4

Plants in low nutrient ecosystems tend to

Accepted Answer

A)  grow slowly and allocate more resources to shoots than roots. 
B)  grow rapidly and allocate more resources to shoots than roots. 
C)  grow rapidly and allocate more resources to roots than shoots. 
D)  grow slowly and allocate more resources to roots than shoots. 
E)  grow rapidly and allocate equal resources to roots and shoots. 
A)  grow slowly and allocate more resources to shoots than roots. 
B)  grow rapidly and allocate more resources to shoots than roots. 
C)  grow rapidly and allocate more resources to roots than shoots. 
D)  grow slowly and allocate more resources to roots than shoots. 
E)  grow rapidly and allocate equal resources to roots and shoots.

Question 5

In a normal distribution,_____ of the observations fall within one standard deviation of the mean.

Accepted Answer

A)  31.7% 
B)  68.3% 
C)  95.5% 
D)  98.3% 
E)  99.7% 
A)  31.7% 
B)  68.3% 
C)  95.5% 
D)  98.3% 
E)  99.7%

Question 6

In aquatic ecosystems,the major agents of decomposition are

Accepted Answer

A)  aquatic fungi. 
B)  bacteria. 
C)  algae. 
D)  detritivorous fish. 
E)  piscivorous fish. 
A)  aquatic fungi. 
B)  bacteria. 
C)  algae. 
D)  detritivorous fish. 
E)  piscivorous fish.

Question 7

Which of the following is NOT an agent of nitrogen fixation?

Accepted Answer

A)  mycorrhizal fungi 
B)  cyanobacteria (blue-green algae) 
C)  bacteria associated with legume roots 
D)  lightning 
E)  actinomycete bacteria associated with alder roots 
A)  mycorrhizal fungi 
B)  cyanobacteria (blue-green algae) 
C)  bacteria associated with legume roots 
D)  lightning 
E)  actinomycete bacteria associated with alder roots

Question 8

Which of the following is NOT an assumption of the t-test?

Accepted Answer

A)  Each sample is drawn from a population with a normal distribution. 
B)  The two populations being compared have equal variances. 
C)  The two populations being compared have equal means. 
D)  All of each sample is drawn from a population with a normal distribution, the two populations being compared have equal variances, and the two populations being compared have equal means are assumptions. 
E)  None of each sample is drawn from a population with a normal distribution, the two populations being compared have equal variances, and the two populations being compared have equal means are assumptions. 
A)  Each sample is drawn from a population with a normal distribution. 
B)  The two populations being compared have equal variances. 
C)  The two populations being compared have equal means. 
D)  All of each sample is drawn from a population with a normal distribution, the two populations being compared have equal variances, and the two populations being compared have equal means are assumptions. 
E)  None of each sample is drawn from a population with a normal distribution, the two populations being compared have equal variances, and the two populations being compared have equal means are assumptions.

Question 9

In stream ecosystems,nutrient retentiveness is

Accepted Answer

A)  not related to spiraling length. 
B)  positively related to spiraling length. 
C)  inversely related to spiraling length. 
D)  a logarithmic function of spiraling length. 
E)  a power function of spiraling length. 
A)  not related to spiraling length. 
B)  positively related to spiraling length. 
C)  inversely related to spiraling length. 
D)  a logarithmic function of spiraling length. 
E)  a power function of spiraling length.

Question 10

Spiraling length of nutrients in streams can be calculated as S = VT.In this equation,

Accepted Answer

A)  V represents nutrient concentration, and T represents water temperature. 
B)  V represents the speed of water flow, and T represents water temperature. 
C)  V represents the speed of water flow, and T represents the time required for nutrients to cycle. 
D)  V represents nutrient retentiveness, and T represents the time required for nutrients to cycle. 
E)  V represents nutrient retentiveness, and T represents species diversity. 
A)  V represents nutrient concentration, and T represents water temperature. 
B)  V represents the speed of water flow, and T represents water temperature. 
C)  V represents the speed of water flow, and T represents the time required for nutrients to cycle. 
D)  V represents nutrient retentiveness, and T represents the time required for nutrients to cycle. 
E)  V represents nutrient retentiveness, and T represents species diversity.

Question 11

_____________ is the movement of nutrients between pools of an ecosystem and influences the distribution of nutrients.

Accepted Answer

A)  Nutrient shedding 
B)  Nutrient cruising 
C)  Nutrient source 
D)  Nutrient sink 
E)  Nutrient flux 
A)  Nutrient shedding 
B)  Nutrient cruising 
C)  Nutrient source 
D)  Nutrient sink 
E)  Nutrient flux

Question 12

Fungi and bacteria release nitrogen stored in dead tissue through a decomposition process called

Accepted Answer

A)  nitrogen fixation. 
B)  ammonification. 
C)  denitrification. 
D)  nitrification. 
E)  nitrogen assimilation. 
A)  nitrogen fixation. 
B)  ammonification. 
C)  denitrification. 
D)  nitrification. 
E)  nitrogen assimilation.

Question 13

Which of the following are nitrogen fixing organisms?

Accepted Answer

A)  cyanobacteria 
B)  leguminous plants 
C)  alders 
D)  All of the choices are correct. 
E)  both cyanobacteria and leguminous plants 
A)  cyanobacteria 
B)  leguminous plants 
C)  alders 
D)  All of the choices are correct. 
E)  both cyanobacteria and leguminous plants

Question 14

Vanni and colleagues found a positive correlation between the N:P ratios of fish and amphibians and their N:P excretion ratios in a tropical stream in Venezuela.

Accepted Answer

A) True 
 B)False

Question 15

"Nitrification" is the conversion of
Rev: 12_06_2013_QC_42091

Accepted Answer

A)  carbon compounds to nitrogen compounds. 
B)  nitrogen gas (N2) to ammonia (NH3). 
C)  ammonium (NH4+) to nitrate (NO3-). 
D)  ammonia (NH3) to nitrogen gas (N2). 
E)  ammonium (NH4+) to nitrite (NO2-). 
A)  carbon compounds to nitrogen compounds. 
B)  nitrogen gas (N2) to ammonia (NH3). 
C)  ammonium (NH4+) to nitrate (NO3-). 
D)  ammonia (NH3) to nitrogen gas (N2). 
E)  ammonium (NH4+) to nitrite (NO2-).

Question 16

In Judy Meyer and Gene Likens' study of phosphorus in Bear Brook,

Accepted Answer

A)  most phosphorus inputs occurred during spring snowmelt. 
B)  phosphorus inputs were nearly constant over the year. 
C)  most phosphorus losses occurred during autumn leaf fall. 
D)  most phosphorus losses occurred during storms and snowmelt. 
E)  phosphorus losses were nearly constant over the year. 
A)  most phosphorus inputs occurred during spring snowmelt. 
B)  phosphorus inputs were nearly constant over the year. 
C)  most phosphorus losses occurred during autumn leaf fall. 
D)  most phosphorus losses occurred during storms and snowmelt. 
E)  phosphorus losses were nearly constant over the year.

The end product of biological nitrogen fixation is

The release of nutrients from organic material in inorganic form is called _____________.

Pocket gophers change the nitrogen cycle in prairies because they

Plants in low nutrient ecosystems tend to

In a normal distribution,_____ of the observations fall within one standard deviation of the mean.

In aquatic ecosystems,the major agents of decomposition are

Which of the following is NOT an agent of nitrogen fixation?

Which of the following is NOT an assumption of the t-test?

In stream ecosystems,nutrient retentiveness is

Spiraling length of nutrients in streams can be calculated as S = VT.In this equation,

_____________ is the movement of nutrients between pools of an ecosystem and influences the distribution of nutrients.

Fungi and bacteria release nitrogen stored in dead tissue through a decomposition process called

Which of the following are nitrogen fixing organisms?

Vanni and colleagues found a positive correlation between the N:P ratios of fish and amphibians and their N:P excretion ratios in a tropical stream in Venezuela.

"Nitrification" is the conversion of Rev: 12_06_2013_QC_42091

In Judy Meyer and Gene Likens' study of phosphorus in Bear Brook,

Introduction to Ecology Historical Foundations and Developing Frontiers

Life on Land

Life in Water

Population Genetics and Natural Selection

Temperature Relations

Water Relations

Energy and Nutrient Relations

Socail Relations

Population Distribution and Abundance

Population Dynamics

Population Growth

Life Histories

Competition

Exploitative Interactions Predation, herbivory, parasitism, and Disease

Mutualism

Species Abundance and Diversity

Species Interactions and Community Structure

Primary Production and Energy Flow

Succession and Stability

Landscape Ecology

Geographic Ecology

Global Ecology

Filters

Exam 19: Nutrient Cycling and Retention

The end product of biological nitrogen fixation is

The release of nutrients from organic material in inorganic form is called _____________.

Pocket gophers change the nitrogen cycle in prairies because they

Plants in low nutrient ecosystems tend to

In a normal distribution,_____ of the observations fall within one standard deviation of the mean.

In aquatic ecosystems,the major agents of decomposition are

Which of the following is NOT an agent of nitrogen fixation?

Which of the following is NOT an assumption of the t-test?

In stream ecosystems,nutrient retentiveness is

Spiraling length of nutrients in streams can be calculated as S = VT.In this equation,

_____________ is the movement of nutrients between pools of an ecosystem and influences the distribution of nutrients.

Fungi and bacteria release nitrogen stored in dead tissue through a decomposition process called

Which of the following are nitrogen fixing organisms?

Vanni and colleagues found a positive correlation between the N:P ratios of fish and amphibians and their N:P excretion ratios in a tropical stream in Venezuela.

"Nitrification" is the conversion of Rev: 12_06_2013_QC_42091

In Judy Meyer and Gene Likens' study of phosphorus in Bear Brook,

Introduction to Ecology Historical Foundations and Developing Frontiers

Life on Land

Life in Water

Population Genetics and Natural Selection

Temperature Relations

Water Relations

Energy and Nutrient Relations

Socail Relations

Population Distribution and Abundance

Population Dynamics

Population Growth

Life Histories

Competition

Exploitative Interactions Predation, herbivory, parasitism, and Disease

Mutualism

Species Abundance and Diversity

Species Interactions and Community Structure

Primary Production and Energy Flow

Succession and Stability

Landscape Ecology

Geographic Ecology

Global Ecology

Filters