Question 1

Fossil fuels are the result of buried organisms where low oxygen levels existed.

Accepted Answer

A) True 
 B)False

Question 2

Energy losses are multiplied in successive energy transfers in a food web.

Accepted Answer

A) True 
 B)False

Question 3

What is thought to be responsible for the worldwide deaths of corals and their endosymbiotic algae?

Accepted Answer

A)   ocean acidification
B)   nitrogen fixation
C)   soil runoff
D)   declining primary productivity
E)   depletion of oxygen in the oceansF) C) and D)
G) A) and B)

Question 4

What was one of the primary results from the Hubbard Brook Watershed Project?

Accepted Answer

A)   Deforestation increases flooding.
B)   New plant species that absorb less water were discovered.
C)   Pollution gravely affected the water supply.
D)   Primary consumers are the most important part of the energy pyramid.
E)   Trees absorb too much water and are not useful in a watershed area.F) A) and C)
G) A) and D)

Question 5

A large percentage of energy passes on from one trophic level to the next.

Accepted Answer

A) True 
 B)False

Question 6

Most available carbon is present as ____.

Accepted Answer

A)   CO2
B)   CaCO3
C)   C
D)   HCO3¯
E)   N2F) A) and E)
G) B) and C)

Question 7

What is the relationship of food webs to biological magnification of toxins?

Accepted Answer

When there are toxins present in the soi...

Question 8

The Lake Erie ecosystem was affected by humans because human activities ____.

Accepted Answer

A)   extracted resources without replacement
B)   caused global warming
C)   used the water without replacement
D)   disrupted energy flow and the cycling of nutrients
E)   extracted energy without replacementF) B) and C)
G) A) and E)

Question 9

The main natural source of phosphorus is ____.

Accepted Answer

A)   Earth's crust
B)   fertilizer
C)   guano
D)   legumes
E)   waterF) B) and C)
G) D) and E)

Question 10

Match between columns
                        Premises: soil water
terrestrial food webs
coal, oil, and peat
terrestrial rocks
gaseous reservoir of carbon dioxide

Accepted Answer

The Answer of B and D and C and E is...

Question 11

Biological magnification is best defined as ____.

Accepted Answer

A)   the increase in toxicity of a chemical compound resulting from its metabolism by a living organism
B)   the higher relative proportion of biomass among producers as compared to consumers in an ecosystem
C)   the concentration of nondegradable poisons within organisms at higher trophic levels
D)   the concentration of degradable poisons within organisms at lower trophic levels
E)   the declining relative proportion of nondegradable poisons in organisms at higher trophic levels as compared to those at lower trophic levelsF) C) and D)
G) A) and B)

Question 12

Burning fossil fuels has clearly resulted in ____.

Accepted Answer

A)   increases in atmospheric concentrations of carbon dioxide
B)   increases in extinction rates
C)   increases in concentrations of carbon dioxide in soils
D)   increases in carbon retention in animals
E)   decreases in atmospheric concentrations of oxygenF) A) and C)
G) B) and E)

Question 13

What is the ratio of the energy content of food consumed to the energy content of food available?

Accepted Answer

A)   ecological efficiency
B)   harvesting efficiency
C)   production efficiency
D)   assimilation efficiency
E)   net primary productivityF) B) and C)
G) None of the above

Question 14

Why is the productivity poor in the deeper parts of the ocean?

Accepted Answer

In the deeper parts of the ocean, sunlig...

Question 15

Why is a pyramid of numbers for a forest sometimes narrow at the bottom?

Accepted Answer

A)   Energy decreases as it passes through each trophic level.
B)   Energy increases as it passes through each trophic level.
C)   Individual producers are small and very numerous.
D)   Herbivorous insects vastly outnumber large producers.
E)   Large producers vastly outnumber insects.F) B) and D)
G) B) and C)

Question 16

Where do terrestrial plants obtain the necessary carbon for photosynthesis?

Accepted Answer

Plants obtain the ma...

Question 17

A small decrease in seawater pH was shown to have a significant effect on ____.

Accepted Answer

A)   climate change
B)   the oceanic sink for carbon dioxide
C)   gene expression in sea urchin larvae
D)   genes expression in zooplankton
E)   carbon dioxide accumulation in the oceanF) None of the above
G) C) and E)

Question 18

Match between columns
                        Premises: gross primary productivity minus the energy used for cellular respiration
the energy transfer from producers to consumers
predicts what would happen if an ecosystem was changed
describes how nutrients accumulate in four compartments
the relationship between a predator and prey that affects populations in two or more trophic levels

Accepted Answer

The Answer of generalized compartment model and ecological pyramid and is...

Question 19

The overall ecological efficiency of most organisms is between ____ percent.

Accepted Answer

A)   1 and 2
B)   2 and 5
C)   5 and 20
D)   10 and 50
E)   50 and 75F) A) and B)
G) A) and C)

Question 20

Zooplankton eating phytoplankton almost as soon as they appear in marine ecosystems causes the pyramid of biomass to ____.

Accepted Answer

A)   resemble the pyramid of energy
B)   invert
C)   widen at the base
D)   add trophic levels
E)   to become obsoleteF) D) and E)
G) C) and E)

Exam 54: Ecosystems

Answer the question using the accompanying figure. Match the appropriate terms to the boxes in the following image. Figure 54.12

The overall ecological efficiency of most organisms is between ____ percent.

Correct Answer
verified

Match each description with the appropriate term. Not all choices will be used.

A small decrease in seawater pH was shown to have a significant effect on ____.

Correct Answer
verified

Where do terrestrial plants obtain the necessary carbon for photosynthesis?

Correct Answer
verified
Plants obtain the ma...
View Answer

What is thought to be responsible for the worldwide deaths of corals and their endosymbiotic algae?

Correct Answer
verified

What is the relationship of food webs to biological magnification of toxins?

Correct Answer
verified
When there are toxins present in the soi...
View Answer

What was one of the primary results from the Hubbard Brook Watershed Project?

Correct Answer
verified

The main natural source of phosphorus is ____.

Correct Answer
verified

The Lake Erie ecosystem was affected by humans because human activities ____.

Correct Answer
verified

Why is a pyramid of numbers for a forest sometimes narrow at the bottom?

Correct Answer
verified

Biological magnification is best defined as ____.

Correct Answer
verified

A large percentage of energy passes on from one trophic level to the next.

Correct Answer
verified

What is the ratio of the energy content of food consumed to the energy content of food available?

Correct Answer
verified

Fossil fuels are the result of buried organisms where low oxygen levels existed.

Correct Answer
verified

Burning fossil fuels has clearly resulted in ____.

Correct Answer
verified

Zooplankton eating phytoplankton almost as soon as they appear in marine ecosystems causes the pyramid of biomass to ____.

Correct Answer
verified

Why is the productivity poor in the deeper parts of the ocean?

Correct Answer
verified
In the deeper parts of the ocean, sunlig...
View Answer

Energy losses are multiplied in successive energy transfers in a food web.

Correct Answer
verified

Most available carbon is present as ____.

Correct Answer
verified

Exam 54: Ecosystems

Answer the question using the accompanying figure. Match the appropriate terms to the boxes in the following image. Figure 54.12

The overall ecological efficiency of most organisms is between ____ percent.

Correct AnswerverifiedShow Answer

Match each description with the appropriate term. Not all choices will be used.

A small decrease in seawater pH was shown to have a significant effect on ____.

Correct AnswerverifiedShow Answer

Where do terrestrial plants obtain the necessary carbon for photosynthesis?

Correct AnswerverifiedPlants obtain the ma...View AnswerShow Answer

What is thought to be responsible for the worldwide deaths of corals and their endosymbiotic algae?

Correct AnswerverifiedShow Answer

What is the relationship of food webs to biological magnification of toxins?

Correct AnswerverifiedWhen there are toxins present in the soi...View AnswerShow Answer

What was one of the primary results from the Hubbard Brook Watershed Project?

Correct AnswerverifiedShow Answer

The main natural source of phosphorus is ____.

Correct AnswerverifiedShow Answer

The Lake Erie ecosystem was affected by humans because human activities ____.

Correct AnswerverifiedShow Answer

Why is a pyramid of numbers for a forest sometimes narrow at the bottom?

Correct AnswerverifiedShow Answer

Biological magnification is best defined as ____.

Correct AnswerverifiedShow Answer

A large percentage of energy passes on from one trophic level to the next.

Correct AnswerverifiedShow Answer

What is the ratio of the energy content of food consumed to the energy content of food available?

Correct AnswerverifiedShow Answer

Fossil fuels are the result of buried organisms where low oxygen levels existed.

Correct AnswerverifiedShow Answer

Burning fossil fuels has clearly resulted in ____.

Correct AnswerverifiedShow Answer

Zooplankton eating phytoplankton almost as soon as they appear in marine ecosystems causes the pyramid of biomass to ____.

Correct AnswerverifiedShow Answer

Why is the productivity poor in the deeper parts of the ocean?

Correct AnswerverifiedIn the deeper parts of the ocean, sunlig...View AnswerShow Answer

Energy losses are multiplied in successive energy transfers in a food web.

Correct AnswerverifiedShow Answer

Most available carbon is present as ____.

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Plants obtain the ma...
View Answer

Correct Answer
verified

Correct Answer
verified
When there are toxins present in the soi...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
In the deeper parts of the ocean, sunlig...
View Answer

Correct Answer
verified

Correct Answer
verified