Question 1

If the compensation point is above the thermocline,

Accepted Answer

A) hypoxic waters can easily circulate to the surface,endangering the lake ecosystem,and this is more likely to happen in the summer. 
B) hypoxic waters cannot easily circulate to the surface,protecting the lake ecosystem,and this is more likely to happen in the summer. 
C) hypoxic waters can easily circulate to the surface,endangering the lake ecosystem,and this is more likely to happen in the winter. 
D) hypoxic waters cannot easily circulate to the surface,protecting the lake ecosystem,and this is more likely to happen in the winter. 
A) hypoxic waters can easily circulate to the surface,endangering the lake ecosystem,and this is more likely to happen in the summer. 
B) hypoxic waters cannot easily circulate to the surface,protecting the lake ecosystem,and this is more likely to happen in the summer. 
C) hypoxic waters can easily circulate to the surface,endangering the lake ecosystem,and this is more likely to happen in the winter. 
D) hypoxic waters cannot easily circulate to the surface,protecting the lake ecosystem,and this is more likely to happen in the winter. A

Question 2

The form of nitrogen that comprises 78% of atmospheric mass and is necessary for biological processes,but is unusable by plants,is

Accepted Answer

A) N₂. 
B) NOx. 
C) N₂O. 
D) NO₂. 
A) N₂. 
B) NOx. 
C) N₂O. 
D) NO₂. A

Question 3

An ecosystem that is stable is likely to have a

Accepted Answer

A) high percentage of "eury" species for the environmental conditions present. 
B) high percentage of "steno" species for the environmental conditions present. 
C) narrow optimal range for the environmental conditions present. 
D) high percentage of r-selected species. 
A) high percentage of "eury" species for the environmental conditions present. 
B) high percentage of "steno" species for the environmental conditions present. 
C) narrow optimal range for the environmental conditions present. 
D) high percentage of r-selected species. A

Question 4

When the climax community appears,

Accepted Answer

A) biodiversity increases. 
B) the total energy fixed exceeds the energy used by respiration. 
C) K-selected species become increasingly favored over r-selected species. 
D) All of these happen. 
A) biodiversity increases. 
B) the total energy fixed exceeds the energy used by respiration. 
C) K-selected species become increasingly favored over r-selected species. 
D) All of these happen.

Question 5

Which of the following animals in Namibia would be most likely to thrive due to an increase in temperature due to climate change?

Accepted Answer

A) African elephant 
B) Namibian giraffe 
C) Oryx 
D) Lion 
A) African elephant 
B) Namibian giraffe 
C) Oryx 
D) Lion

Question 6

The diagram below illustrates the point that the cows are

Accepted Answer

A) first-level heterotrophs. 
B) second-level heterotrophs. 
C) primary producers. 
D) keystone predators. 
A) first-level heterotrophs. 
B) second-level heterotrophs. 
C) primary producers. 
D) keystone predators.

Question 7

Kudzu is a type of invasive

Accepted Answer

A) rodent in the southeastern United States. 
B) fern in the southeastern United States. 
C) vine in the southeastern United States. 
D) fish in the southeastern United States. 
A) rodent in the southeastern United States. 
B) fern in the southeastern United States. 
C) vine in the southeastern United States. 
D) fish in the southeastern United States.

Question 8

Ultramafic igneous rocks (those with very high magnesium and iron,and low silica content)may offer the best hope for improving the environment by

Accepted Answer

A) being placed on the ocean floor,where they can absorb water and reduce global sea levels. 
B) absorbing CO₂,with their rate of absorption capable of being increased by people. 
C) pulling ground-level ozone out of the atmosphere as it cools. 
D) reducing the rate of salinization of soils when it is ground into a fine powder and sprinkled on the surface. 
A) being placed on the ocean floor,where they can absorb water and reduce global sea levels. 
B) absorbing CO₂,with their rate of absorption capable of being increased by people. 
C) pulling ground-level ozone out of the atmosphere as it cools. 
D) reducing the rate of salinization of soils when it is ground into a fine powder and sprinkled on the surface.

Question 9

Of the following animals in Namibia that compete for many of the same resources,which one has carved out a niche by being able to withstand very high temperatures?

Accepted Answer

A) Southern yellow-billed hornbill 
B) Zebra 
C) Agama lizard 
D) Elephant 
A) Southern yellow-billed hornbill 
B) Zebra 
C) Agama lizard 
D) Elephant

Question 10

Which of the following animals is an invasive in Namibia?

Accepted Answer

A) Snake 
B) Goat 
C) Stone grasshopper 
D) Oryx 
A) Snake 
B) Goat 
C) Stone grasshopper 
D) Oryx

Question 11

Which of the following is not an important factor that contributes to net primary productivity?

Accepted Answer

A) Intensity of insolation 
B) Soil nutrients 
C) Precipitation 
D) All of these are important factors. 
A) Intensity of insolation 
B) Soil nutrients 
C) Precipitation 
D) All of these are important factors.

Question 12

Tropospheric ozone forms when

Accepted Answer

A) sunlight causes NO₂to photodissociate. 
B) SO₂reacts with particulate matter. 
C) NOx reacts with ammonia (NH₃). 
D) carbon dioxide is released into the atmosphere from fossil fuel combustion. 
A) sunlight causes NO₂to photodissociate. 
B) SO₂reacts with particulate matter. 
C) NOx reacts with ammonia (NH₃). 
D) carbon dioxide is released into the atmosphere from fossil fuel combustion.

Question 13

The plant shown in the photograph below is an invasive species that often clogs waterways in the southeastern United States.It is the

Accepted Answer

A) lily pad. 
B) coypu. 
C) water hyacinth. 
D) cottonmouth. 
A) lily pad. 
B) coypu. 
C) water hyacinth. 
D) cottonmouth.

Question 14

The diagram below depicts the

Accepted Answer

A) nitrogen cycle. 
B) carbon cycle. 
C) titanium cycle. 
D) phosphorus cycle 
A) nitrogen cycle. 
B) carbon cycle. 
C) titanium cycle. 
D) phosphorus cycle

Question 15

In the diagram below,the importance of the falling precipitation at "A" for the global carbon cycle is that

Accepted Answer

A) the falling rain makes carbon in the atmosphere more inert,giving it much greater potential to act as a greenhouse gas and warm the Earth. 
B) the falling rain brings CaCO₃ which was trapped in the atmosphere to the surface,cooling the Earth. 
C) the falling rain lubricates the Earth's surface,making crustal deformation more likely,which would bring carbon stored in the lithosphere back up to the atmosphere,warming the Earth. 
D) CO₂combines with water to form H₂CO₃,removing carbon from the atmosphere and cooling the Earth. 
A) the falling rain makes carbon in the atmosphere more inert,giving it much greater potential to act as a greenhouse gas and warm the Earth. 
B) the falling rain brings CaCO₃ which was trapped in the atmosphere to the surface,cooling the Earth. 
C) the falling rain lubricates the Earth's surface,making crustal deformation more likely,which would bring carbon stored in the lithosphere back up to the atmosphere,warming the Earth. 
D) CO₂combines with water to form H₂CO₃,removing carbon from the atmosphere and cooling the Earth.

Question 16

A habitat consists of

Accepted Answer

A) the source of energy that a species acquires. 
B) the position of a species on the food chain or food web. 
C) the physical environment where a species lives. 
D) the rate of nutrient cycling that takes place in an ecosystem. 
A) the source of energy that a species acquires. 
B) the position of a species on the food chain or food web. 
C) the physical environment where a species lives. 
D) the rate of nutrient cycling that takes place in an ecosystem.

Question 17

A likely scenario for causing the population trend shown in the diagram below is

Accepted Answer

A) the carrying capacity changed. 
B) favorable environmental conditions caused a temporary population explosion above the carrying capacity. 
C) a keystone predator was removed from the ecosystem at the point that the population began to decline. 
D) primary succession began at the time when the population reached its peak. 
A) the carrying capacity changed. 
B) favorable environmental conditions caused a temporary population explosion above the carrying capacity. 
C) a keystone predator was removed from the ecosystem at the point that the population began to decline. 
D) primary succession began at the time when the population reached its peak.

Question 18

Assuming that all other factors are equal,on a cold winter afternoon the amount of dissolved O₂in a lake will be

Accepted Answer

A) more than on a hot day because the decreased energy in colder water makes O₂molecules less likely to escape to the atmosphere,and biological oxygen demand will be higher than on a hot day. 
B) less than on a hot day because the decreased energy in colder water makes O₂molecules more likely to escape to the atmosphere,and biological oxygen demand will be higher than on a hot day. 
C) more than on a hot day because the decreased energy in colder water makes O₂molecules less likely to escape to the atmosphere,and biological oxygen demand will be lower than on a hot day. 
D) less than on a hot day because the decreased energy in colder water makes O₂molecules more likely to escape to the atmosphere,and biological oxygen demand will be lower than on a hot day. 
A) more than on a hot day because the decreased energy in colder water makes O₂molecules less likely to escape to the atmosphere,and biological oxygen demand will be higher than on a hot day. 
B) less than on a hot day because the decreased energy in colder water makes O₂molecules more likely to escape to the atmosphere,and biological oxygen demand will be higher than on a hot day. 
C) more than on a hot day because the decreased energy in colder water makes O₂molecules less likely to escape to the atmosphere,and biological oxygen demand will be lower than on a hot day. 
D) less than on a hot day because the decreased energy in colder water makes O₂molecules more likely to escape to the atmosphere,and biological oxygen demand will be lower than on a hot day.

Question 19

Which of the following is not a way in which biodiversity directly helps society?

Accepted Answer

A) Buffer against extreme events. 
B) Insurance policy against the impacts of new diseases. 
C) Aesthetic and spiritual value. 
D) Prevention of global warming. 
A) Buffer against extreme events. 
B) Insurance policy against the impacts of new diseases. 
C) Aesthetic and spiritual value. 
D) Prevention of global warming.

Question 20

The diagram below shows that most of the reservoir and flux of the biogeochemical cycle called the sulfur cycle takes place in the lithosphere,so it is termed a(n)

Accepted Answer

A) metamorphic cycle. 
B) igneous cycle. 
C) sedimentary cycle. 
D) rock cycle. 
A) metamorphic cycle. 
B) igneous cycle. 
C) sedimentary cycle. 
D) rock cycle.

If the compensation point is above the thermocline,

The form of nitrogen that comprises 78% of atmospheric mass and is necessary for biological processes,but is unusable by plants,is

An ecosystem that is stable is likely to have a

When the climax community appears,

Which of the following animals in Namibia would be most likely to thrive due to an increase in temperature due to climate change?

The diagram below illustrates the point that the cows are

Kudzu is a type of invasive

Ultramafic igneous rocks (those with very high magnesium and iron,and low silica content)may offer the best hope for improving the environment by

Of the following animals in Namibia that compete for many of the same resources,which one has carved out a niche by being able to withstand very high temperatures?

Which of the following animals is an invasive in Namibia?

Which of the following is not an important factor that contributes to net primary productivity?

Tropospheric ozone forms when

The plant shown in the photograph below is an invasive species that often clogs waterways in the southeastern United States.It is the

The diagram below depicts the

In the diagram below,the importance of the falling precipitation at "A" for the global carbon cycle is that

A habitat consists of

A likely scenario for causing the population trend shown in the diagram below is

Assuming that all other factors are equal,on a cold winter afternoon the amount of dissolved O₂in a lake will be

Which of the following is not a way in which biodiversity directly helps society?

The diagram below shows that most of the reservoir and flux of the biogeochemical cycle called the sulfur cycle takes place in the lithosphere,so it is termed a(n)

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Exam 17: Ecosystems and Biogeochemical Cycles

If the compensation point is above the thermocline,

The form of nitrogen that comprises 78% of atmospheric mass and is necessary for biological processes,but is unusable by plants,is

An ecosystem that is stable is likely to have a

When the climax community appears,

Which of the following animals in Namibia would be most likely to thrive due to an increase in temperature due to climate change?

The diagram below illustrates the point that the cows are

Kudzu is a type of invasive

Ultramafic igneous rocks (those with very high magnesium and iron,and low silica content)may offer the best hope for improving the environment by

Of the following animals in Namibia that compete for many of the same resources,which one has carved out a niche by being able to withstand very high temperatures?

Which of the following animals is an invasive in Namibia?

Which of the following is not an important factor that contributes to net primary productivity?

Tropospheric ozone forms when

The plant shown in the photograph below is an invasive species that often clogs waterways in the southeastern United States.It is the

The diagram below depicts the

In the diagram below,the importance of the falling precipitation at "A" for the global carbon cycle is that

A habitat consists of

A likely scenario for causing the population trend shown in the diagram below is

Assuming that all other factors are equal,on a cold winter afternoon the amount of dissolved O₂in a lake will be

Which of the following is not a way in which biodiversity directly helps society?

The diagram below shows that most of the reservoir and flux of the biogeochemical cycle called the sulfur cycle takes place in the lithosphere,so it is termed a(n)

The Nature of Physical Geography

Energy and Matter in the Atmosphere

Atmospheric Motion

Atmospheric Moisture

Weather Systems and Severe Weather

Atmosphere-Ocean-Cryosphere Interactions

Climates Around the World

Water Resources

Understanding Landscapes

Plate Tectonics and Regional Features

Volcanoes,deformation,and Earthquakes

Weathering and Mass Wasting

Streams and Flooding

Glaciers and Glacial Landforms

Coasts and Changing Sea Levels

Soils

Biomes

Filters