Question 1

In an ecosystem,energy differs from nutrients in that

Accepted Answer

A)  energy is recycled through photosynthesis,but nutrients are recycled through the atmosphere. 
B)  nutrients are recycled,but energy eventually moves out of the system and is lost. 
C)  nutrients are recycled through plant roots,but energy is recycled through leaves. 
D)  energy is recycled by producers,but nutrients are recycled by consumers. 
A)  energy is recycled through photosynthesis,but nutrients are recycled through the atmosphere. 
B)  nutrients are recycled,but energy eventually moves out of the system and is lost. 
C)  nutrients are recycled through plant roots,but energy is recycled through leaves. 
D)  energy is recycled by producers,but nutrients are recycled by consumers.

Question 2

A nutrient whose biogeochemical cycle does not include an atmospheric phase is said to have a(n)________ cycle.

Accepted Answer

The answer of A nutrient whose biogeochemical cycle does not...

Question 3

Coral reefs and swamps are among Earth's most productive ecosystems.

Accepted Answer

A) True 
 B)False

Question 4

Urine can be a valuable resource for soil nutrients,especially ________.

Accepted Answer

The answer of Urine can be a valuable resource for...

Question 5

Which of the following series best represents the energy flow in an ecosystem?

Accepted Answer

A)  sun $\rarr$ consumer $\rarr$producer $\rarr$ heat 
B)  consumer $\rarr$ producer $\rarr$ decomposer $\rarr$ sun 
C)  producer $\rarr$ consumer $\rarr$ decomposer $\rarr$ sun 
D)  sun $\rarr$ producer $\rarr$consumer $\rarr$ heat 
A)  sun $\rarr$ consumer $\rarr$producer $\rarr$ heat 
B)  consumer $\rarr$ producer $\rarr$ decomposer $\rarr$ sun 
C)  producer $\rarr$ consumer $\rarr$ decomposer $\rarr$ sun 
D)  sun $\rarr$ producer $\rarr$consumer $\rarr$ heat

Question 6

All areas of the same landmass have the same net primary productivity.

Accepted Answer

A) True 
 B)False

Question 7

The impacts of acid rain

Accepted Answer

A)  are quickly reversed by most soils. 
B)  can last for long periods of time. 
C)  are almost entirely confined to terrestrial ecosystems. 
D)  presently are experienced only in the United States. 
A)  are quickly reversed by most soils. 
B)  can last for long periods of time. 
C)  are almost entirely confined to terrestrial ecosystems. 
D)  presently are experienced only in the United States.

Question 8

Which of the following describes the ultimate disposition of most energy in an ecosystem?

Accepted Answer

A)  It is used to construct the bodies of decomposers. 
B)  It is trapped as fossil fuels when producers die and become fossilized. 
C)  It is continuously recycled back into the ecosystem. 
D)  It eventually returns to space in the form of heat. 
A)  It is used to construct the bodies of decomposers. 
B)  It is trapped as fossil fuels when producers die and become fossilized. 
C)  It is continuously recycled back into the ecosystem. 
D)  It eventually returns to space in the form of heat.

Question 9

The following figure shows the net primary productivity (NPP)in marine biomes around the world.
   
One factor that influences the areas with >90 g/m2 per year in the above diagram involving nutrient-rich layers being driven to the surface is ________.

Accepted Answer

Question 10

The following figure illustrates how nutrients cycle between organic and inorganic reservoirs.Within each reservoir,the nutrient may be available or unavailable for use.
 
According to the figure above,what is the inorganic reservoir where phosphorus is unavailable?

Accepted Answer

A)  the atmosphere 
B)  the soil 
C)  ocean sediments 
D)  decomposers 
A)  the atmosphere 
B)  the soil 
C)  ocean sediments 
D)  decomposers

Question 11

The imbalance of soil nutrients causing the hemlock population decline has been associated with ________ overpopulation.

Accepted Answer

A)  bird 
B)  tree 
C)  insect 
D)  deer 
A)  bird 
B)  tree 
C)  insect 
D)  deer

Question 12

Human activities

Accepted Answer

A)  rarely affect nutrient cycles. 
B)  can alter nutrient cycles on a global scale. 
C)  tend to cause only local changes in nutrient cycles. 
D)  generally improve nutrient cycling in ecosystems. 
A)  rarely affect nutrient cycles. 
B)  can alter nutrient cycles on a global scale. 
C)  tend to cause only local changes in nutrient cycles. 
D)  generally improve nutrient cycling in ecosystems.

Question 13

An ecosystem service provided by floodplains is to absorb excess flood waters,keeping floods from becoming more severe.

Accepted Answer

A) True 
 B)False

Question 14

The term ecosystem services is used to describe beneficial activities performed by healthy ecosystems.Which of the following is NOT an example of ecosystem services?

Accepted Answer

A)  pollination of crops 
B)  flood control 
C)  filtering of pollutants from water 
D)  construction of dikes and levees 
A)  pollination of crops 
B)  flood control 
C)  filtering of pollutants from water 
D)  construction of dikes and levees

Question 15

Ecosystems are closed systems.

Accepted Answer

A) True 
 B)False

Question 16

Cougars defend a relatively large territory;consider the following facts and estimate how much area a cougar would require: A cougar requires 490 kg annually and obtains most of its food from deer,which average 55 kg.In a typical deer habitat,the NPP is 35 kg per acre.One deer consumes approximately 1,150 kg of vegetation each year.

Accepted Answer

A)  300 acres 
B)  1,925 acres 
C)  3,000 acres 
D)  4,500 acres 
A)  300 acres 
B)  1,925 acres 
C)  3,000 acres 
D)  4,500 acres

Question 17

Human actions such as logging,building on a floodplain,or diverting rivers increase the probability of severe ________.

Accepted Answer

The answer of Human actions such as logging,building on a...

Question 18

Each level of an energy pyramid corresponds to a step in a food chain and is called a(n)________ level.

Accepted Answer

The answer of Each level of an energy pyramid corresponds...

Question 19

Biologists use the term ________ to refer to the weight of organisms per unit area.

Accepted Answer

The answer of Biologists use the term ________ to refer...

Question 20

In a typical nutrient cycle,nutrients are generally captured into the biotic portion of the cycle by the

Accepted Answer

A)  herbivores. 
B)  primary producers. 
C)  carnivores. 
D)  decomposers. 
A)  herbivores. 
B)  primary producers. 
C)  carnivores. 
D)  decomposers.

Exam 24: Ecosystems

In an ecosystem,energy differs from nutrients in that

A nutrient whose biogeochemical cycle does not include an atmospheric phase is said to have a(n)________ cycle.

Coral reefs and swamps are among Earth's most productive ecosystems.

Urine can be a valuable resource for soil nutrients,especially ________.

Which of the following series best represents the energy flow in an ecosystem?

All areas of the same landmass have the same net primary productivity.

The impacts of acid rain

Which of the following describes the ultimate disposition of most energy in an ecosystem?

The following figure shows the net primary productivity (NPP)in marine biomes around the world. One factor that influences the areas with >90 g/m2 per year in the above diagram involving nutrient-rich layers being driven to the surface is ________.

The following figure illustrates how nutrients cycle between organic and inorganic reservoirs.Within each reservoir,the nutrient may be available or unavailable for use. According to the figure above,what is the inorganic reservoir where phosphorus is unavailable?

The imbalance of soil nutrients causing the hemlock population decline has been associated with ________ overpopulation.

Human activities

An ecosystem service provided by floodplains is to absorb excess flood waters,keeping floods from becoming more severe.

The term ecosystem services is used to describe beneficial activities performed by healthy ecosystems.Which of the following is NOT an example of ecosystem services?

Ecosystems are closed systems.

Human actions such as logging,building on a floodplain,or diverting rivers increase the probability of severe ________.

Each level of an energy pyramid corresponds to a step in a food chain and is called a(n)________ level.

Biologists use the term ________ to refer to the weight of organisms per unit area.

In a typical nutrient cycle,nutrients are generally captured into the biotic portion of the cycle by the

The Nature of Science and the Characteristics of Life

The Chemistry of Life

Cell Structure and Internal Compartments

Cell Membranes, Transport, and Communication

Energy, Metabolism, and Enzymes

Photosynthesis and Cellular Respiration

Cell Division

Cancer and Human Health

Patterns of Inheritance

Chromosomes and Human Genetics

DNA and Genes

From Gene to Protein

DNA Technology

How Evolution Works

The Origin of Species

The Evolution of Biodiversity

Biological Diversity, Bacteria, and Archaea

Protista, Plantae, and Fungi

Animalia

The Biosphere

Growth of Populations

Animal Behavior

Ecological Communities

Global Change

Internal Organization and Homeostasis

Nutrition and Digestion

Circulation and Gas Exchange

Animal Hormones

Nervous and Sensory Systems

Skeletons,Muscles,and Movement

The Immune System

Reproduction and Development

Plant Structure, Nutrition, and Transport

Plant Growth and Reproduction

Filters

The following figure shows the net primary productivity (NPP)in marine biomes around the world. One factor that influences the areas with >90 g/m² per year in the above diagram involving nutrient-rich layers being driven to the surface is ________.