Question 1

Earthʹs ozone layer is extremely important because it

Accepted Answer

A)   traps heat so that Earthʹs temperature does not fall too much.
B)   blocks incoming UV radiation, which is damaging to animals and reduces photosynthesis in plants and algae.
C)   maintains high carbon dioxide concentrations so that photosynthesis can occur.
D)   blocks incoming visible light to protect Earth against the greenhouse effect.
E)   traps harmful infrared rays.F) D) and E)
G) A) and C)

Question 2

_________is the year-round layer of frozen soil that limits the growth of trees and other deep-rooted plants in the arctic tundra.

Accepted Answer

The answer of _________is the year-round layer of frozen soil...

Question 3

What factors determine the patterns of ocean currents?

Accepted Answer

The patterns are determined by...

Question 4

Explain, in ecological terms, why cattle ranchers and conservationists have battled one another over cattle-grazing practices in the western shortgrass prairie biome of the American West. How has grazing changed the habitat?

Accepted Answer

Overgrazing of grasses by cattle has alt...

Question 5

In an attempt to stop desertification, some groups have changed the way they work with the land. They plant trees to stop erosion, build small barriers to slow water runoff on slopes, and bring food to their animals rather than letting them graze freely. Why would these techniques help stop desertification?

Accepted Answer

A)   The trees increase evaporation.
B)   They increase the amount of water used in the area.
C)   People move out of the areas rather than follow these techniques, lessening the water demand.
D)   They break up the cyanobacteria in the soil.
E)   Trees, runoff diversion, and changes in grazing patterns all conserve water.F) A) and B)
G) B) and C)

Question 6

In the tropical deciduous forest, the amount of_________ defines the seasons.

Accepted Answer

The answer of In the tropical deciduous forest, the amount...

Question 7

One of the most popular hikes in Rocky Mountain National Park is the tundra trail. What effects would you expect from hundreds of people walking on this trail every day during the season?

Accepted Answer

Because the plants are so smal...

Question 8

Channeling rivers improves their productivity and decreases erosion.

Accepted Answer

A) True 
 B)False

Question 9

The weather at the equator is both fairly constant seasonally and quite warm. What physical factors of Earthʹs position relative to the sun are responsible for these characteristics?

Accepted Answer

At the equator, sunlight hits Earthʹs su...

Question 10

In a tropical rain forest, the majority of animals are found

Accepted Answer

A)   in the cleared areas.
B)   in the soil.
C)   on the forest floor.
D)   in the towering treetops.
E)   in the shorter trees.F) None of the above
G) C) and E)

Question 11

On the basis of nutrient content, a mountain lake with little sediment or nutrients is classified as a(n) _________lake.

Accepted Answer

The answer of On the basis of nutrient content, a...

Question 12

Patterns of temperature and precipitation that prevail over years are referred to as weather.

Accepted Answer

A) True 
 B)False

Question 13

Which biome is rapidly expanding into the African Sahel?

Accepted Answer

A)   Tropical rain forest
B)   Savanna
C)   Desert
D)   Chaparral
E)   Tropical deciduous forestF) All of the above
G) C) and E)

Question 14

Plants in this biome have small leaves coated with protective waxes to reduce evaporation, and they can survive a fire.

Accepted Answer

A)   Chaparral
B)   Tropical rain forest
C)   Tropical deciduous forest
D)   Savanna
E)   DesertF) A) and C)
G) A) and E)

Question 15

The striking dissimilarities in plant communities among different biomes that have the same average yearly amount of rainfall can be explained by the fact that

Accepted Answer

A)   temperature and rainfall interact to influence plant communities.
B)   plant communities are not influenced by rainfall.
C)   plant communities are influenced more by the acidity of rain than by the amount of rainfall.
D)   plant communities evolve more slowly than changes in weather patterns.
E)   plant communities occur randomly, depending on where seeds are blown or carried.F) A) and C)
G) A) and E)

Question 16

Oligotrophic lakes

Accepted Answer

A)   depend on sulfur bacteria as the primary producers.
B)   provide breeding grounds for many fish and crustacean species.
C)   support dense plant communities.
D)   remove nutrient-rich sediments from field runoff.
E)   have low levels of nutrients and few organisms.F) C) and D)
G) A) and C)

Question 17

The destruction of the_________ layer increases the amount of damaging UV light that reaches Earth?s surface.

Accepted Answer

The answer of The destruction of the_________ layer increases the...

Question 18

Estuaries have very low bioproductivity and diversity.

Accepted Answer

A) True 
 B)False

Question 19

Plants with small leaves and thick stems that store water are more likely to be found growing in a rain shadow.

Accepted Answer

A) True 
 B)False

Question 20

The profundal zone is home to organisms that are

Accepted Answer

A)   photosynthetic.
B)   intertidal.
C)   decomposers and detritivores.
D)   eutrophic.
E)   adapted to high levels of light.F) None of the above
G) A) and B)

Exam 30: Earths Diverse Ecosystems

Oligotrophic lakes

Correct Answer
verified

In the tropical deciduous forest, the amount of_________ defines the seasons.

Correct Answer
verified

In a tropical rain forest, the majority of animals are found

Correct Answer
verified

Earthʹs ozone layer is extremely important because it

Correct Answer
verified

Explain, in ecological terms, why cattle ranchers and conservationists have battled one another over cattle-grazing practices in the western shortgrass prairie biome of the American West. How has grazing changed the habitat?

Correct Answer
verified
Overgrazing of grasses by cattle has alt...
View Answer

The striking dissimilarities in plant communities among different biomes that have the same average yearly amount of rainfall can be explained by the fact that

Correct Answer
verified

Plants with small leaves and thick stems that store water are more likely to be found growing in a rain shadow.

Correct Answer
verified

The profundal zone is home to organisms that are

Correct Answer
verified

The destruction of the_________ layer increases the amount of damaging UV light that reaches Earth?s surface.

Correct Answer
verified

_________is the year-round layer of frozen soil that limits the growth of trees and other deep-rooted plants in the arctic tundra.

Correct Answer
verified

Correct Answer
verified

Which biome is rapidly expanding into the African Sahel?

Correct Answer
verified

Estuaries have very low bioproductivity and diversity.

Correct Answer
verified

Patterns of temperature and precipitation that prevail over years are referred to as weather.

Correct Answer
verified

Plants in this biome have small leaves coated with protective waxes to reduce evaporation, and they can survive a fire.

Correct Answer
verified

On the basis of nutrient content, a mountain lake with little sediment or nutrients is classified as a(n) _________lake.

Correct Answer
verified

The weather at the equator is both fairly constant seasonally and quite warm. What physical factors of Earthʹs position relative to the sun are responsible for these characteristics?

Correct Answer
verified
At the equator, sunlight hits Earthʹs su...
View Answer

What factors determine the patterns of ocean currents?

Correct Answer
verified
The patterns are determined by...
View Answer

One of the most popular hikes in Rocky Mountain National Park is the tundra trail. What effects would you expect from hundreds of people walking on this trail every day during the season?

Correct Answer
verified
Because the plants are so smal...
View Answer

Channeling rivers improves their productivity and decreases erosion.

Correct Answer
verified

Exam 30: Earths Diverse Ecosystems

Oligotrophic lakes

Correct AnswerverifiedShow Answer

In the tropical deciduous forest, the amount of_________ defines the seasons.

Correct AnswerverifiedShow Answer

In a tropical rain forest, the majority of animals are found

Correct AnswerverifiedShow Answer

Earthʹs ozone layer is extremely important because it

Correct AnswerverifiedShow Answer

Explain, in ecological terms, why cattle ranchers and conservationists have battled one another over cattle-grazing practices in the western shortgrass prairie biome of the American West. How has grazing changed the habitat?

Correct AnswerverifiedOvergrazing of grasses by cattle has alt...View AnswerShow Answer

The striking dissimilarities in plant communities among different biomes that have the same average yearly amount of rainfall can be explained by the fact that

Correct AnswerverifiedShow Answer

Plants with small leaves and thick stems that store water are more likely to be found growing in a rain shadow.

Correct AnswerverifiedShow Answer

The profundal zone is home to organisms that are

Correct AnswerverifiedShow Answer

The destruction of the_________ layer increases the amount of damaging UV light that reaches Earth?s surface.

Correct AnswerverifiedShow Answer

_________is the year-round layer of frozen soil that limits the growth of trees and other deep-rooted plants in the arctic tundra.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which biome is rapidly expanding into the African Sahel?

Correct AnswerverifiedShow Answer

Estuaries have very low bioproductivity and diversity.

Correct AnswerverifiedShow Answer

Patterns of temperature and precipitation that prevail over years are referred to as weather.

Correct AnswerverifiedShow Answer

Plants in this biome have small leaves coated with protective waxes to reduce evaporation, and they can survive a fire.

Correct AnswerverifiedShow Answer

On the basis of nutrient content, a mountain lake with little sediment or nutrients is classified as a(n) _________lake.

Correct AnswerverifiedShow Answer

The weather at the equator is both fairly constant seasonally and quite warm. What physical factors of Earthʹs position relative to the sun are responsible for these characteristics?

Correct AnswerverifiedAt the equator, sunlight hits Earthʹs su...View AnswerShow Answer

What factors determine the patterns of ocean currents?

Correct AnswerverifiedThe patterns are determined by...View AnswerShow Answer

One of the most popular hikes in Rocky Mountain National Park is the tundra trail. What effects would you expect from hundreds of people walking on this trail every day during the season?

Correct AnswerverifiedBecause the plants are so smal...View AnswerShow Answer

Channeling rivers improves their productivity and decreases erosion.

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Overgrazing of grasses by cattle has alt...
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

Correct Answer
verified
At the equator, sunlight hits Earthʹs su...
View Answer

Correct Answer
verified
The patterns are determined by...
View Answer

Correct Answer
verified
Because the plants are so smal...
View Answer

Correct Answer
verified