Question 1

Net production energy divided by assimilation energy is _____ efficiency.

Accepted Answer

A)   consumption
B)   assimilation
C)   net assimilation
D)   net productionE) None of the above
F) All of the above D

Question 2

Which technique allows measurement of conditions on Earth from a distant location?

Accepted Answer

A)   remote sensing
B)   remote monitoring
C)   satellite sensing
D)   satellite monitoringE) A) and D)
F) A) and C) A

Question 3

Silicon is used primarily by

Accepted Answer

A)   zooxanthellae.
B)   zooplankton.
C)   diatoms.
D)   algae.E) B) and C)
F) All of the above

Question 4

What term describes the total mass of trees, shrubs, herbaceous plants, and grasses present in a given forest on a given day?

Accepted Answer

A)   NPP, or net primary productivity
B)   GPP, or gross primary productivity
C)   primary productivity
D)   standing cropE) All of the above
F) A) and B)

Question 5

Which is the portion of energy that an organism uses to maintain its body temperature?

Accepted Answer

A)   primary
B)   secondary
C)   egested
D)   respiredE) A) and C)
F) A) and B)

Question 6

(Figure 20.9) The figure shows that as mean annual temperature increases, net primary productivity also increases. Net primary productivity increases with mean annual precipitation until approximately 3 meters of precipitation, after which productivity declines. Why does this decline occur?

Accepted Answer

The answer of  (Figure 20.9) The figure shows that...

Question 7

Why when measuring primary productivity is O2 uptake perhaps a more reliable technique than CO2 uptake?

Accepted Answer

The question seems to be referring to th...

Question 8

The 10 percent ecological efficiency rule of thumb has implications for humans in what way?

Accepted Answer

A)   The 10 percent rule can instruct humans as to which systems need the most protection.
B)   Understanding the 10 percent rule might protect species from extinction.
C)   Recognizing the 10 percent efficiency rule may provide insight into future human diets on an increasingly populated planet.
D)   The 10 percent ecological efficiency rule points to the open ocean as a means to increase worldwide food production.E) A) and D)
F) A) and C)

Question 9

Energy that an organism uses to add to its biomass is

Accepted Answer

A)   egested.
B)   respired.
C)   assimilated.
D)   secondary.E) C) and D)
F) All of the above

Question 10

The rate at which solar or chemical energy is captured and converted to chemical bonds by photosynthesis or chemosynthesis is called

Accepted Answer

A)   secondary productivity.
B)   net primary productivity.
C)   gross primary productivity.
D)   primary productivityE) B) and C)
F) A) and D)

Question 11

Why have non-native earthworms caused a decline in salamander populations in North America?

Accepted Answer

A)   Earthworms are predators of newly hatched salamanders.
B)   Earthworms caused reductions in insects that salamanders eat.
C)   Earthworms disturb soil, which makes it less hospitable to salamanders.
D)   Earthworms outcompete salamanders for soil nutrients.E) A) and B)
F) B) and C)

Question 12

Aquatic ecosystems can be limited by silicon because

Accepted Answer

A)   there are few silicon organisms in the upper waters.
B)   many organisms compete for the silicon.
C)   silicon sinks slower than nitrogen or phosphorus.
D)   silicon sinks faster than nitrogen or phosphorus.E) All of the above
F) C) and D)

Question 13

The biomass of producers in a given area of an ecosystem at a particular moment is called

Accepted Answer

A)   net primary production.
B)   ecosystem mass.
C)   the standing crop.
D)   the standing harvest.E) A) and C)
F) A) and D)

Question 14

The percentage of energy or biomass in a trophic level that is consumed by the next higher trophic level is called _____ efficiency.

Accepted Answer

A)   consumption
B)   predation
C)   assimilation
D)   net productionE) A) and C)
F) A) and B)

Question 15

In terms of NPP (net primary productivity) , the most productive terrestrial systems are found in _____, while the most productive aquatic systems are found in _____.

Accepted Answer

A)   temperate forests; open ocean
B)   boreal forest; salt marshes
C)   savannas; coral reefs
D)   tropical forests; freshwater marshesE) A) and B)
F) All of the above

Question 16

Aquatic NPP is primarily limited by

Accepted Answer

A)   fertility.
B)   light.
C)   temperature.
D)   salinity.E) B) and D)
F) B) and C)

Question 17

Differentiate between gross primary productivity (GPP) and net primary productivity (NPP).

Accepted Answer

Gross Primary Productivity (GPP) and Net...

Question 18

Which of the following is NOT a high-productivity aquatic ecosystem?

Accepted Answer

A)   estuary
B)   coral reef
C)   salt marsh
D)   open oceanE) B) and D)
F) All of the above

Question 19

NPP varies with _____ around the world.

Accepted Answer

A)   elevation
B)   soil type
C)   longitude
D)   latitudeE) B) and C)
F) None of the above D

Question 20

When an animal eats fruit with hard seeds that cannot be digested and are excreted whole as a waste product, the seeds constitute _____ energy.

Accepted Answer

A)   assimilated
B)   egested
C)   respired
D)   kineticE) C) and D)
F) A) and D)

Exam 20: Movement of Energy in Ecosystems

Net production energy divided by assimilation energy is _____ efficiency.

Correct AnswerverifiedD

Which technique allows measurement of conditions on Earth from a distant location?

Correct AnswerverifiedA

Silicon is used primarily by

Correct AnswerverifiedShow Answer

What term describes the total mass of trees, shrubs, herbaceous plants, and grasses present in a given forest on a given day?

Correct AnswerverifiedShow Answer

Which is the portion of energy that an organism uses to maintain its body temperature?

Correct AnswerverifiedShow Answer

(Figure 20.9) The figure shows that as mean annual temperature increases, net primary productivity also increases. Net primary productivity increases with mean annual precipitation until approximately 3 meters of precipitation, after which productivity declines. Why does this decline occur?

Correct AnswerverifiedShow Answer

Why when measuring primary productivity is O2 uptake perhaps a more reliable technique than CO2 uptake?

Correct AnswerAnswered by ExamLex AIThe question seems to be referring to th...View AnswerShow Answer

The 10 percent ecological efficiency rule of thumb has implications for humans in what way?

Correct AnswerverifiedShow Answer

Energy that an organism uses to add to its biomass is

Correct AnswerverifiedShow Answer

The rate at which solar or chemical energy is captured and converted to chemical bonds by photosynthesis or chemosynthesis is called

Correct AnswerverifiedShow Answer

Why have non-native earthworms caused a decline in salamander populations in North America?

Correct AnswerverifiedShow Answer

Aquatic ecosystems can be limited by silicon because

Correct AnswerverifiedShow Answer

The biomass of producers in a given area of an ecosystem at a particular moment is called

Correct AnswerverifiedShow Answer

The percentage of energy or biomass in a trophic level that is consumed by the next higher trophic level is called _____ efficiency.

Correct AnswerverifiedShow Answer

In terms of NPP (net primary productivity) , the most productive terrestrial systems are found in _____, while the most productive aquatic systems are found in _____.

Correct AnswerverifiedShow Answer

Aquatic NPP is primarily limited by

Correct AnswerverifiedShow Answer

Differentiate between gross primary productivity (GPP) and net primary productivity (NPP).

Correct AnswerAnswered by ExamLex AIGross Primary Productivity (GPP) and Net...View AnswerShow Answer

Which of the following is NOT a high-productivity aquatic ecosystem?

Correct AnswerverifiedShow Answer

NPP varies with _____ around the world.

Correct AnswerverifiedD

When an animal eats fruit with hard seeds that cannot be digested and are excreted whole as a waste product, the seeds constitute _____ energy.

Correct AnswerverifiedShow Answer

Exam 20: Movement of Energy in Ecosystems　

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Why when measuring primary productivity is O₂ uptake perhaps a more reliable technique than CO₂ uptake?

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Answered by ExamLex AI
The question seems to be referring to th...
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In terms of NPP (net primary productivity) , the most productive terrestrial systems are found in _, while the most productive aquatic systems are found in _.

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Answered by ExamLex AI
Gross Primary Productivity (GPP) and Net...
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D

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