Question 1

Which of the following statements about secondary succession is TRUE:
A)It leads to a stable,persistent climax community.
B)It reaches completion in about 15 years.
C)It occurs in areas lacking vegetation where soil is present.
D)It typically begins with lichens.

Accepted Answer

The answer of Which of the following statements about secondary...

Question 2

Describe the ecological significance of fire.Why has the question of fire in fire-dependent ecosystems become more complicated in recent years
 Make a case for humans deliberately setting fires,giving the advantages and disadvantages for the ecosystem.What are three other fire prevention practices that can reduce the threat of fire to those who have homes in fire-vulnerable areas
?

Accepted Answer

The answer of Describe the ecological significance of fire.Why has...

Question 3

Freshwater wetlands and estuaries are highly productive and provide enough food to support a variety of organisms.Define a freshwater wetland and an estuary and discuss the ecologically important roles that these ecosystems play.

Accepted Answer

The answer of Freshwater wetlands and estuaries are highly productive...

Question 4

Compare and contrast the zonation and ecology of freshwater lakes.Identify relevant processes,and incorporate specific examples where appropriate using the following terminology: littoral,limnetic,and profundal.

Accepted Answer

The answer of Compare and contrast the zonation and ecology...

Question 5

Draw a flow diagram of an old field undergoing succession.What type of succession is this and why
?

Accepted Answer

The answer of Draw a flow diagram of an old...

Question 6

What is natural selection
?What are the basic requirements for natural selection
?

Accepted Answer

The answer of What is natural selection
?What are the basic...

Question 7

How would you argue against the following statement made during the zoning board hearings in your local community
.
 "Deserts are barren,hot and dry wastelands.My proposed housing development,including off-road vehicle recreation areas,will replace this scorching,arid,harsh environment with homes that will benefit the entire community."

Accepted Answer

The answer of How would you argue against the following...

Question 8

Which of the following represents the sequence of primary succession on a bare rock ?
A)lichens → mosses → grasses → shrubs → trees
B)crabgrass → weeds → oak trees → pine trees
C)crabgrass → horseweed → weeds → pine trees → hardwood trees
D)grasses → shrubs → poplars → pine trees → oak trees

Accepted Answer

Primary succession typically begins with pioneer species such as lichens and mosses that can tolerate harsh and rocky environments. As they grow and die, they begin to form soil and provide nutrients for other plants to grow. Grasses are often next in the sequence because they can establish themselves in shallow soils. Shrubs and trees follow as soil depth and nutrient content increase.

Question 9

How are goats useful in the chaparral
?
Why are they needed
?
What challenges do they present as a management tool
?

Accepted Answer

The answer of How are goats useful in the chaparral
?
Why...

Question 10

Which of the following organisms would be members of a pioneer community on bare rock ?
A)grass
B)lichens
C)herbs
D)ferns

Accepted Answer

Lichens are the organisms that can be found in pioneer communities on bare rock. They have the ability to survive and grow in harsh environments with very little soil or water. Their ability to break down rock and create soil is an important step in the process of primary succession. Grass, herbs, and ferns require soil and would not be found in pioneer communities on bare rock.

Question 11

Identify two abiotic factors that play a role in determining species composition in aquatic ecosystems.Briefly explain the importance of each to aquatic ecosystems and what role,if any,each factor plays in terrestrial biomes.

Accepted Answer

The answer of Identify two abiotic factors that play a...

Quiz 6: Ecosystems and Evolution

Which of the following statements about secondary succession is TRUE:

Freshwater wetlands and estuaries are highly productive and provide enough food to support a variety of organisms.Define a freshwater wetland and an estuary and discuss the ecologically important roles that these ecosystems play.

Compare and contrast the zonation and ecology of freshwater lakes.Identify relevant processes,and incorporate specific examples where appropriate using the following terminology: littoral,limnetic,and profundal.

Draw a flow diagram of an old field undergoing succession.What type of succession is this and why ?

What is natural selection ?What are the basic requirements for natural selection ?

Which of the following represents the sequence of primary succession on a bare rock ?

How are goats useful in the chaparral ? Why are they needed ? What challenges do they present as a management tool ?

Which of the following organisms would be members of a pioneer community on bare rock ?

Identify two abiotic factors that play a role in determining species composition in aquatic ecosystems.Briefly explain the importance of each to aquatic ecosystems and what role,if any,each factor plays in terrestrial biomes.