Question 1

Sedimentary nutrients

Accepted Answer

A)  cycle very slowly and can often become limiting. 
B)  are easily replaced if lost from an ecosystem by erosion of the local rock. 
C)  are distributed from locally abundant reservoirs through atmospheric circulation. 
D)  include carbon,oxygen,nitrogen,and sulfur. 
A)  cycle very slowly and can often become limiting. 
B)  are easily replaced if lost from an ecosystem by erosion of the local rock. 
C)  are distributed from locally abundant reservoirs through atmospheric circulation. 
D)  include carbon,oxygen,nitrogen,and sulfur.

Question 2

The following figure shows the net primary productivity (NPP)in marine biomes around the world.
 
The pattern of NPP in marine ecosystems as shown above suggests that

Accepted Answer

A)  marine productivity is as sensitive to temperature as terrestrial productivity. 
B)  without shade from overhead vegetation,marine productivity typically exceeds that found in terrestrial ecosystems. 
C)  marine ecosystems are also limited by sunlight,with the highest productivity at the equator. 
D)  most marine productivity results from the input of terrestrially derived nutrients. 
A)  marine productivity is as sensitive to temperature as terrestrial productivity. 
B)  without shade from overhead vegetation,marine productivity typically exceeds that found in terrestrial ecosystems. 
C)  marine ecosystems are also limited by sunlight,with the highest productivity at the equator. 
D)  most marine productivity results from the input of terrestrially derived nutrients.

Question 3

Nutrients that have an atmospheric cycle

Accepted Answer

A)  include carbon,nitrogen,and phosphorus. 
B)  may be affected by events that occur in distant parts of the globe. 
C)  may become trapped in ocean sediments until tectonic processes elevate the ocean floor. 
D)  can quickly become locally depleted and limit NPP. 
A)  include carbon,nitrogen,and phosphorus. 
B)  may be affected by events that occur in distant parts of the globe. 
C)  may become trapped in ocean sediments until tectonic processes elevate the ocean floor. 
D)  can quickly become locally depleted and limit NPP.

Question 4

Essential elements required by producers are called nutrients.

Accepted Answer

A) True 
 B)False

Question 5

Primary consumers harvest nearly 100 percent of the energy that producers capture from the sun.

Accepted Answer

A) True 
 B)False

Question 6

Phosphorus is the only major nutrient with a sedimentary cycle.

Accepted Answer

A) True 
 B)False

Question 7

Nutrients that have a(n)________ cycle move relatively quickly through terrestrial and aquatic ecosystems.

Accepted Answer

The answer of Nutrients that have a(n)________ cycle move relatively...

Question 8

An overabundance of nutrients has no impact on plants,but it can be beneficial to animals.

Accepted Answer

A) True 
 B)False

Question 9

Rainfall in some areas of Canada has a high acidity level and a correspondingly high pH.

Accepted Answer

A) True 
 B)False

Question 10

Once an organic molecule enters a metabolic pathway,a significant percentage of its energy

Accepted Answer

A)  can be recycled through the ecosystem. 
B)  will be recovered and used by decomposers. 
C)  is lost as unrecoverable heat. 
D)  enters the nutrient cycle. 
A)  can be recycled through the ecosystem. 
B)  will be recovered and used by decomposers. 
C)  is lost as unrecoverable heat. 
D)  enters the nutrient cycle.

Question 11

Within the ecosystem,nutrients

Accepted Answer

A)  move in a one-way path from producers toward consumers. 
B)  regularly cycle between organisms and the nonliving environment. 
C)  are consumed by their use and thus are not available for recycling. 
D)  are rarely limiting because they are constantly replenished as the Earth's crust is eroded. 
A)  move in a one-way path from producers toward consumers. 
B)  regularly cycle between organisms and the nonliving environment. 
C)  are consumed by their use and thus are not available for recycling. 
D)  are rarely limiting because they are constantly replenished as the Earth's crust is eroded.

Question 12

Humans have harmed hemlock populations by

Accepted Answer

A)  mining nutrients from the soil. 
B)  fertilizer runoff from fields. 
C)  logging hemlock groves. 
D)  factories producing components for acid rain. 
A)  mining nutrients from the soil. 
B)  fertilizer runoff from fields. 
C)  logging hemlock groves. 
D)  factories producing components for acid rain.

Question 13

Which of the following is the dominant type of organism in a natural terrestrial ecosystem that has the greatest net primary productivity (NPP)?

Accepted Answer

A)  grass 
B)  trees 
C)  food crops 
D)  fish 
A)  grass 
B)  trees 
C)  food crops 
D)  fish

Question 14

On average,what percentage of the energy from one trophic level of an energy pyramid is transferred to the next trophic level?

Accepted Answer

A)  10 percent 
B)  33 percent 
C)  50 percent 
D)  100 percent 
A)  10 percent 
B)  33 percent 
C)  50 percent 
D)  100 percent

Question 15

Lightning converts atmospheric nitrogen (N2)to nitrogen compounds that mix with the soil.This is the mechanism by which the majority of nitrogen enters the soil.

Accepted Answer

A) True 
 B)False

Question 16

Which of the following would most likely take longest to replace if lost from a terrestrial ecosystem?

Accepted Answer

A)  sulfur 
B)  carbon 
C)  oxygen 
D)  phosphorous 
A)  sulfur 
B)  carbon 
C)  oxygen 
D)  phosphorous

Question 17

Net primary productivity in a terrarium could be estimated by

Accepted Answer

A)  carefully controlling the amount of light entering it. 
B)  counting the change in the number of plant species in it. 
C)  weighing the terrarium at regular intervals. 
D)  removing the primary consumers and weighing them at regular intervals. 
A)  carefully controlling the amount of light entering it. 
B)  counting the change in the number of plant species in it. 
C)  weighing the terrarium at regular intervals. 
D)  removing the primary consumers and weighing them at regular intervals.

Question 18

What best explains the low productivity of the open ocean?

Accepted Answer

A)  The open ocean lacks sufficient light to support photosynthesis. 
B)  Nutrients rapidly sink to depths that sunlight cannot reach. 
C)  The open ocean is actually very productive,but its primary producers are consumed as quickly as they grow. 
D)  These regions are typically too cool to support significant primary production. 
A)  The open ocean lacks sufficient light to support photosynthesis. 
B)  Nutrients rapidly sink to depths that sunlight cannot reach. 
C)  The open ocean is actually very productive,but its primary producers are consumed as quickly as they grow. 
D)  These regions are typically too cool to support significant primary production.

Question 19

The amount of energy that organisms capture in photosynthesis,minus the amount lost as heat from respiration,is called ________.

Accepted Answer

net primar

Question 20

Eutrophication can eventually lead to

Accepted Answer

A)  an ecosystem that attracts many species. 
B)  a rapid decrease in algal populations. 
C)  an increase in dissolved oxygen in a water ecosystem. 
D)  a decrease in dissolved oxygen in a water ecosystem. 
A)  an ecosystem that attracts many species. 
B)  a rapid decrease in algal populations. 
C)  an increase in dissolved oxygen in a water ecosystem. 
D)  a decrease in dissolved oxygen in a water ecosystem.

Exam 24: Ecosystems

Sedimentary nutrients

The following figure shows the net primary productivity (NPP)in marine biomes around the world. The pattern of NPP in marine ecosystems as shown above suggests that

Nutrients that have an atmospheric cycle

Essential elements required by producers are called nutrients.

Primary consumers harvest nearly 100 percent of the energy that producers capture from the sun.

Phosphorus is the only major nutrient with a sedimentary cycle.

Nutrients that have a(n)________ cycle move relatively quickly through terrestrial and aquatic ecosystems.

An overabundance of nutrients has no impact on plants,but it can be beneficial to animals.

Rainfall in some areas of Canada has a high acidity level and a correspondingly high pH.

Once an organic molecule enters a metabolic pathway,a significant percentage of its energy

Within the ecosystem,nutrients

Humans have harmed hemlock populations by

Which of the following is the dominant type of organism in a natural terrestrial ecosystem that has the greatest net primary productivity (NPP)?

On average,what percentage of the energy from one trophic level of an energy pyramid is transferred to the next trophic level?

Lightning converts atmospheric nitrogen (N2)to nitrogen compounds that mix with the soil.This is the mechanism by which the majority of nitrogen enters the soil.

Which of the following would most likely take longest to replace if lost from a terrestrial ecosystem?

Net primary productivity in a terrarium could be estimated by

What best explains the low productivity of the open ocean?

The amount of energy that organisms capture in photosynthesis,minus the amount lost as heat from respiration,is called ________.

Eutrophication can eventually lead to

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

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Lightning converts atmospheric nitrogen (N₂)to nitrogen compounds that mix with the soil.This is the mechanism by which the majority of nitrogen enters the soil.