Question 1

In the diagram below,how do nutrient and energy flow differ?

Accepted Answer

A)   Energy flow is one-way, whereas nutrients are recycled.
B)   Energy is recycled, whereas nutrient flow is one-way.
C)   Only about 10 percent of energy flows from trophic level to trophic level. Nutrient flow is 100 percent from trophic level to trophic level.
D)   Energy flows only to primary producers and decomposers, whereas nutrients flow only to secondary consumers and decomposers.

Question 2

Your spacecraft crash-lands on an airless,lifeless moon.All that survives,along with the crew and you,are some chickens,cornflakes,and vitamins.The air and water recyclers are functioning.To maximize the food supply until a rescue craft arrives,you and the crew should

Accepted Answer

A)   feed the cornflakes and vitamins to the chickens, then eat the eggs until rescued.
B)   kill all the chickens immediately, eat them first, and then eat the cornflakes.
C)   mark each week's survival by eating one chicken.
D)   share the cornflakes with the chickens and eat a chicken each day. When the chickens are all eaten, shift to eating whatever cornflakes are left.

Question 3

Other than the polar tundra,the LEAST productive terrestrial biomes tend to be

Accepted Answer

A)   deserts.
B)   temperate forests.
C)   tropical forests.
D)   estuaries.

Question 4

A variety of species living together and interacting with each other in a defined place form an ________.

Accepted Answer

ecological...

Question 5

When humans consume herbivores such as cattle,they occupy which trophic level of a food chain?

Accepted Answer

A)   primary consumer
B)   secondary consumer
C)   tertiary consumer
D)   primary producer

Question 6

Why are deserts and tundra among the least productive terrestrial biomes?

Accepted Answer

A)   Water is not easily accessible by plants in desert and tundra biomes, and both of these biomes experience extreme temperature conditions. Water availability and temperature are important limiting factors in net primary productivity (NPP) .
B)   There is too much water available in the tundra and not enough available in the desert. The extreme temperatures of these biomes do not affect NPP.
C)   There is not enough sunlight available in either the tundra or the desert biomes to sufficiently support NPP.
D)   There is far too much sunlight and water available in both the desert and tundra biomes. These factors cause photosynthesis to be suspended and result in dramatically decreased NPP.

Question 7

Describe how chemical nutrients enter and are recycled through an ecosystem.

Accepted Answer

Chemical nutrients enter the ecosystem p...

Question 8

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.

Question 9

Several research teams have questioned Daniel Boyce's data that indicates a loss of 500 million tons of phytoplankton a year from Earth's oceans.Is it important for researchers to accurately determine trends in net primary productivity (NPP) in the oceans because

Accepted Answer

A)   there are similarities between the NPP requirements on land and in the ocean.
B)   there are no similarities between the NPP requirements on land and in the ocean.
C)   the loss of 500 million tons of phytoplankton each year could have a negative effect on the ocean's NPP and all of the ocean life that depends upon it.
D)   the loss of 500 million tons of phytoplankton each year could have a positive effect on the ocean's NPP and all of the ocean life that depends upon it.

Question 10

Match each term to its correct description below.
-Characterized by warm temperatures and roughly 12 hours of daylight all year,this biome receives either seasonally heavy rains or year-round rains that leach nutrients from the soil.Much of the soil nutrients are locked up in the biomass of the heavy vegetation.This biome is one of the most richly biodiverse and productive ecosystems on the planet.

Accepted Answer

A)  tropical forest
B)  chaparral
C)  boreal forest
D)  tundra
E)  desertF) temperate deciduous forestG) grassland

Question 11

If a person needs to consume 100 kcal of energy and she chooses to do so by eating chicken,how many kcal of grain would the chicken need to consume to make 100 kcal available to the human?

Accepted Answer

A)   1,000
B)   10,000
C)   100,000
D)   1,000,000

Question 12

Almost all life on Earth is directly or indirectly dependent on

Accepted Answer

A)   solar energy.
B)   predation.
C)   physical productivity.
D)   human civilization.

Question 13

The amount of energy captured by photosynthetic organisms,minus the amount lost as heat from respiration and other life processes,is called ________.

Accepted Answer

net primar...

Question 14

Which of the following would be abiotic components of an arctic,marine ecosystem?

Accepted Answer

A)   salt water, ice, snow, sun, wind, rocks, and sand
B)   polar bears, seals, salmon, seaweed, and puffins
C)   buffalo, meadowlarks, eagles, grasses, and cottonwood trees
D)   deer, skinks, squirrels, oak trees, pine trees, and mosses

Question 15

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 Earth's crust erodes.

Question 16

A group of living communities interacting with one another and their shared physical environment is a(n)________.

Accepted Answer

The answer of A group of living communities interacting with...

Question 17

Describe what estuaries are,where they can be found,their relative productivity,and the reasons for their productivity level.

Accepted Answer

Estuaries are shallow,aquatic biomes loc...

Question 18

When humans consume rice,they occupy which trophic level of a food chain?

Accepted Answer

A)   primary consumer
B)   secondary consumer
C)   tertiary consumer
D)   primary producer

Question 19

The ultimate disposition of most energy in an ecosystem

Accepted Answer

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

Question 20

An ecosystem that experiences a small increase in nutrients available to primary producers is likely to show

Accepted Answer

A)   an increase in net primary productivity.
B)   a decrease in net primary productivity.
C)   no change in net primary productivity.
D)   a decrease in net primary productivity followed by an immediate return to average net primary productivity.

Exam 21: Ecosystems

A variety of species living together and interacting with each other in a defined place form an ________.

Correct Answer
verified
ecological...
View Answer

In the diagram below,how do nutrient and energy flow differ?

Correct Answer
verified

When humans consume herbivores such as cattle,they occupy which trophic level of a food chain?

Correct Answer
verified

Within the ecosystem,nutrients

Correct Answer
verified

Why are deserts and tundra among the least productive terrestrial biomes?

Correct Answer
verified

Almost all life on Earth is directly or indirectly dependent on

Correct Answer
verified

If a person needs to consume 100 kcal of energy and she chooses to do so by eating chicken,how many kcal of grain would the chicken need to consume to make 100 kcal available to the human?

Correct Answer
verified

Describe how chemical nutrients enter and are recycled through an ecosystem.

Correct Answer
verified
Chemical nutrients enter the ecosystem p...
View Answer

An ecosystem that experiences a small increase in nutrients available to primary producers is likely to show

Correct Answer
verified

The amount of energy captured by photosynthetic organisms,minus the amount lost as heat from respiration and other life processes,is called ________.

Correct Answer
verified
net primar...
View Answer

Your spacecraft crash-lands on an airless,lifeless moon.All that survives,along with the crew and you,are some chickens,cornflakes,and vitamins.The air and water recyclers are functioning.To maximize the food supply until a rescue craft arrives,you and the crew should

Correct Answer
verified

Several research teams have questioned Daniel Boyce's data that indicates a loss of 500 million tons of phytoplankton a year from Earth's oceans.Is it important for researchers to accurately determine trends in net primary productivity (NPP) in the oceans because

Correct Answer
verified

Which of the following would be abiotic components of an arctic,marine ecosystem?

Correct Answer
verified

In an ecosystem,energy differs from nutrients in that

Correct Answer
verified

Other than the polar tundra,the LEAST productive terrestrial biomes tend to be

Correct Answer
verified

Describe what estuaries are,where they can be found,their relative productivity,and the reasons for their productivity level.

Correct Answer
verified
Estuaries are shallow,aquatic biomes loc...
View Answer

When humans consume rice,they occupy which trophic level of a food chain?

Correct Answer
verified

A group of living communities interacting with one another and their shared physical environment is a(n)________.

Correct Answer
verified

Correct Answer
verified

The ultimate disposition of most energy in an ecosystem

Correct Answer
verified

Exam 21: Ecosystems

A variety of species living together and interacting with each other in a defined place form an ________.

Correct Answerverifiedecological...View AnswerShow Answer

In the diagram below,how do nutrient and energy flow differ?

Correct AnswerverifiedShow Answer

When humans consume herbivores such as cattle,they occupy which trophic level of a food chain?

Correct AnswerverifiedShow Answer

Within the ecosystem,nutrients

Correct AnswerverifiedShow Answer

Why are deserts and tundra among the least productive terrestrial biomes?

Correct AnswerverifiedShow Answer

Almost all life on Earth is directly or indirectly dependent on

Correct AnswerverifiedShow Answer

If a person needs to consume 100 kcal of energy and she chooses to do so by eating chicken,how many kcal of grain would the chicken need to consume to make 100 kcal available to the human?

Correct AnswerverifiedShow Answer

Describe how chemical nutrients enter and are recycled through an ecosystem.

Correct AnswerverifiedChemical nutrients enter the ecosystem p...View AnswerShow Answer

An ecosystem that experiences a small increase in nutrients available to primary producers is likely to show

Correct AnswerverifiedShow Answer

The amount of energy captured by photosynthetic organisms,minus the amount lost as heat from respiration and other life processes,is called ________.

Correct Answerverifiednet primar...View AnswerShow Answer

Your spacecraft crash-lands on an airless,lifeless moon.All that survives,along with the crew and you,are some chickens,cornflakes,and vitamins.The air and water recyclers are functioning.To maximize the food supply until a rescue craft arrives,you and the crew should

Correct AnswerverifiedShow Answer

Several research teams have questioned Daniel Boyce's data that indicates a loss of 500 million tons of phytoplankton a year from Earth's oceans.Is it important for researchers to accurately determine trends in net primary productivity (NPP) in the oceans because

Correct AnswerverifiedShow Answer

Which of the following would be abiotic components of an arctic,marine ecosystem?

Correct AnswerverifiedShow Answer

In an ecosystem,energy differs from nutrients in that

Correct AnswerverifiedShow Answer

Other than the polar tundra,the LEAST productive terrestrial biomes tend to be

Correct AnswerverifiedShow Answer

Describe what estuaries are,where they can be found,their relative productivity,and the reasons for their productivity level.

Correct AnswerverifiedEstuaries are shallow,aquatic biomes loc...View AnswerShow Answer

When humans consume rice,they occupy which trophic level of a food chain?

Correct AnswerverifiedShow Answer

A group of living communities interacting with one another and their shared physical environment is a(n)________.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

The ultimate disposition of most energy in an ecosystem

Correct AnswerverifiedShow Answer

Correct Answer
verified
ecological...
View Answer

Correct Answer
verified

Correct Answer
verified

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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
verified
Chemical nutrients enter the ecosystem p...
View Answer

Correct Answer
verified

Correct Answer
verified
net primar...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Estuaries are shallow,aquatic biomes loc...
View Answer

Correct Answer
verified

Correct Answer
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Correct Answer
verified

Correct Answer
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