Question 1

Mycorrhizal fungi obtain food from plants in exchange for water and nutrients.This is an example of

Accepted Answer

A)  commensalism.
B)  parasitism.
C)  mutualism.
D)  predation.
E)  herbivory.F) A) and B)
G) A) and C)

Question 2

Which of the following is NOT a component of a tropical marine ecosystem?

Accepted Answer

A)  All of the answers are components of a tropical marine ecosystem.
B)  sunlight
C)  algae
D)  corals
E)  fishesF) A) and E)
G) B) and E)

Question 3

Which of the following is NOT considered a coniferous tree?

Accepted Answer

A)  spruce
B)  pine
C)  maple
D)  fir
E)  hemlockF) A) and B)
G) B) and D)

Question 4

Why are estuaries and coral reefs more productive than deeper regions of the ocean?

Accepted Answer

A)  They have more access to light and nutrients.
B)  They have more access to light and lower salt concentrations in the water.
C)  They have more access to light.
D)  They have more access to nutrients and lower salt concentrations in the water.
E)  They have lower salt concentrations in the water.F) A) and C)
G) A) and E) A

Question 5

A genetic change in one species that selects for a subsequent change in a different species is termed

Accepted Answer

A)  coevolution.
B)  genetic dispersion.
C)  gene dynamics.
D)  competitive exclusion.
E)  evolutionary dynamics.F) A) and B)
G) D) and E)

Question 6

The highest elevation at which trees can grow is

Accepted Answer

A)  the Arctic tree line.
B)  usually determined by salt spray.
C)  determined by temperature.
D)  the Antarctic tree line.
E)  usually determined by oxygen concentration in the atmospherE.F) C) and D)
G) A) and D)

Question 7

When two or more species vie for the same limited resource,______ occurs.

Accepted Answer

A)  succession
B)  symbiosis
C)  coevolution
D)  stotting
E)  competitionF) B) and D)
G) B) and E) E

Question 8

If global temperatures increase,which biome will the Boundary Waters Canoe Area (BWCA) turn into?

Accepted Answer

A)  tropical rainforest
B)  deciduous forest
C)  boreal forest
D)  short grass prairie
E)  tundraF) A) and E)
G) B) and E)

Question 9

Scientists reported that hurricane intensity has increased over the past 35 years,coinciding with increasing sea temperature.At the equator,the Earth receives the

Accepted Answer

A)  maximum amount of solar radiation per unit areA.
B)  minimum amount of solar radiation per unit area.
C)  maximum amount of solar radiation only over the ocean.
D)  maximum amount of solar radiation only over the land mass.E) B) and C)
F) A) and D)

Question 10

Which of the following is NOT a major component of soil?

Accepted Answer

A)  rock fragments
B)  organic matter
C)  microbes
D)  bacteria
E)  chloroplastsF) C) and E)
G) A) and D)

Question 11

Which of the following are biotic interactions in an ecosystem?

Accepted Answer

A)  competition and competitive exclusion
B)  mutualism and parasitism
C)  herbivory and predation
D)  None of the answers are biotic interactions.
E)  All of the answers are biotic interactions.F) C) and D)
G) A) and B)

Question 12

An organism's ______ is its position in the food chain relative to the ecosystem's energy source.

Accepted Answer

A)  habitat
B)  niche
C)  climax level
D)  trophic level
E)  keystone levelF) A) and D)
G) C) and D)

Question 13

The area where the fresh water of a river meets the salt water of the ocean is a(n)

Accepted Answer

A)  intertidal zone.
B)  continental shelf.
C)  hydrothermal vent.
D)  open ocean.
E)  estuary.F) A) and B)
G) B) and E)

Question 14

In the section "Investigating Life: Two Kingdoms and a Virus Team Up to Beat the Heat",what is the dependent variable in the figure?

Accepted Answer

A)  number of plants that could grow at 37 ∘\circ∘ C
B)  number of plants that could grow at 65 ∘\circ∘ C
C)  number of plants that died at 65 ∘\circ∘ C
D)  number of plants that died at 37 ∘\circ∘ C E) B) and D)
F) C) and D)

Question 15

Along coastlines,the area between high tide and low tide is the

Accepted Answer

A)  open ocean.
B)  hydrothermal vent.
C)  intertidal zone.
D)  estuary.
E)  continental shelf.F) C) and D)
G) None of the above

Question 16

An example of a keystone species is a root-associated fungus that conifer trees need in order to survive and that supplies food for rodents.

Accepted Answer

A) True 
 B)False

Question 17

The adaptations in Pseudomyrmex species and acacias suggest that the two species

Accepted Answer

A)  have coevolved.
B)  have intermingled.
C)  have evolved separately.
D)  occupy the same niche.
E)  occupy the same tidal zonE.F) A) and B)
G) A) and C)

Question 18

Most of Earth's fresh water is found in lakes,ponds,and streams.

Accepted Answer

A) True 
 B)False

Question 19

Parasitism is a symbiotic relationship in which neither member of the relationship benefits.

Accepted Answer

A) True 
 B)False  False

Question 20

What features of a desert ecosystem control the communities which can survive in a desert?

Accepted Answer

A)  amount of light
B)  temperature
C)  amount of water
D)  All answers are correct.
E)  amount of usable habitatF) B) and D)
G) B) and C)

Exam 19: Communities and Ecosystems

Mycorrhizal fungi obtain food from plants in exchange for water and nutrients.This is an example of

Correct AnswerverifiedShow Answer

Which of the following is NOT a component of a tropical marine ecosystem?

Correct AnswerverifiedShow Answer

Which of the following is NOT considered a coniferous tree?

Correct AnswerverifiedShow Answer

Why are estuaries and coral reefs more productive than deeper regions of the ocean?

Correct AnswerverifiedA

A genetic change in one species that selects for a subsequent change in a different species is termed

Correct AnswerverifiedShow Answer

The highest elevation at which trees can grow is

Correct AnswerverifiedShow Answer

When two or more species vie for the same limited resource,______ occurs.

Correct AnswerverifiedE

If global temperatures increase,which biome will the Boundary Waters Canoe Area (BWCA) turn into?

Correct AnswerverifiedShow Answer

Scientists reported that hurricane intensity has increased over the past 35 years,coinciding with increasing sea temperature.At the equator,the Earth receives the

Correct AnswerverifiedShow Answer

Which of the following is NOT a major component of soil?

Correct AnswerverifiedShow Answer

Which of the following are biotic interactions in an ecosystem?

Correct AnswerverifiedShow Answer

An organism's ______ is its position in the food chain relative to the ecosystem's energy source.

Correct AnswerverifiedShow Answer

The area where the fresh water of a river meets the salt water of the ocean is a(n)

Correct AnswerverifiedShow Answer

In the section "Investigating Life: Two Kingdoms and a Virus Team Up to Beat the Heat",what is the dependent variable in the figure?

Correct AnswerverifiedShow Answer

Along coastlines,the area between high tide and low tide is the

Correct AnswerverifiedShow Answer

An example of a keystone species is a root-associated fungus that conifer trees need in order to survive and that supplies food for rodents.

Correct AnswerverifiedShow Answer

The adaptations in Pseudomyrmex species and acacias suggest that the two species

Correct AnswerverifiedShow Answer

Most of Earth's fresh water is found in lakes,ponds,and streams.

Correct AnswerverifiedShow Answer

Parasitism is a symbiotic relationship in which neither member of the relationship benefits.

Correct AnswerverifiedFalse

What features of a desert ecosystem control the communities which can survive in a desert?

Correct AnswerverifiedShow Answer

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False

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