Question 1

______ bacteria return nitrogen to the atmosphere by converting nitrates to N2.

Accepted Answer

A)  Nitrogen-fixing
B)  In nitrification,
C)  In denitrification,
D)  In transpiration,
E)  In respiration,F) B) and D)
G) A) and E)

Question 2

Organisms that obtain their energy from producers or other consumers are

Accepted Answer

A)  autotrophs and producers.
B)  producers and heterotrophs.
C)  autotrophs.
D)  producers.
E)  heterotrophs.F) B) and D)
G) A) and D)

Question 3

Mercury released from coal-burning power plants would be at the highest concentration in

Accepted Answer

A)  the phytoplankton.
B)  eagles that eat the walleye.
C)  the zooplankton.
D)  the minnows.
E)  the walleyE.F) None of the above
G) A) and E)

Question 4

Tropical rainforest destruction threatens the global water cycle and carbon cycle.

Accepted Answer

A) True 
 B)False

Question 5

If there are 10,000 calories of net primary productivity in an ecosystem,how much energy will be generally available to a primary consumer?

Accepted Answer

A)  100 calories
B)  10,000 calories
C)  10 calories
D)  1,000 calories
E)  1 calorieF) A) and B)
G) None of the above

Question 6

Nitrogen-fixing bacteria in the roots of soybeans help provide a source of nitrogen to the plants,and in exchange,the bacteria obtain food from the plants.Which type of interaction is this?

Accepted Answer

A)  mutualism
B)  commensalism
C)  parasitism
D)  predation
E)  herbivoryF) D) and E)
G) A) and B)

Question 7

The "rain shadow" of a mountain is found on the leeward side of the mountain.

Accepted Answer

A) True 
 B)False

Question 8

A type of symbiosis in which one member of the relationship benefits and the other is harmed is

Accepted Answer

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

Question 9

As temperatures in an African savanna increase and rainfall decreases,it would most likely change into

Accepted Answer

A)  taigA.
B)  desert.
C)  tropical rainforest.
D)  temperate forest.
E)  tundra.F) B) and D)
G) A) and E)

Question 10

A type of symbiosis in which both species benefit is

Accepted Answer

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

Question 11

Which of the following is NOT an abiotic component or condition of an ecosystem?

Accepted Answer

A)  water
B)  archaea
C)  rock
D)  salinity
E)  temperatureF) A) and C)
G) A) and B)

Question 12

The concentration of the pesticide DDT is likely highest in which of the following?

Accepted Answer

A)  a minnow
B)  a mosquito larva
C)  a seagull
D)  plankton
E)  algaeF) A) and B)
G) None of the above

Question 13

An insect that resembles the face of a snake is using ______ to avoid predation.

Accepted Answer

A)  camouflage
B)  warning coloration
C)  mimicry
D)  chemical defense
E)  mutualismF) A) and E)
G) A) and D)

Question 14

Scientists reported that hurricane intensity has increased over the past 35 years,coinciding with increasing sea temperature.Why would climate change lead to an increase in hurricane intensity?

Accepted Answer

A)  increase in sea level due to melting of the polar ice caps
B)  increased evaporation of water into the atmosphere
C)  increased condensation of water falling as snow over the mainland
D)  increased temperatures at higher latitudes
E)  increased conversion of grassland biomes to desertF) B) and C)
G) D) and E)

Question 15

In the section "Investigating Life: Two Kingdoms and a Virus Team Up to Beat the Heat",what was the purpose of repeatedly drying,freezing,and thawing some of the fungi?

Accepted Answer

A)  to kill the fungi
B)  to prepare the fungi for growth at 65 ∘\circ∘ C
C)  to remove the virus
D)  to prepare the fungi to infect the panic grass
E)  to make the fungus more susceptible to the virus F) C) and D)
G) B) and D)

Question 16

In the section "Investigating Life: Two Kingdoms and a Virus Team Up to Beat the Heat",panic grass is a(n)

Accepted Answer

A)  monocot.
B)  dicot.
C)  algae.
D)  seedless plant.
E)  bryophytE.F) A) and D)
G) None of the above

Question 17

The ______ states that two species cannot coexist indefinitely in the same niche.

Accepted Answer

A)  endosymbiotic theory
B)  zonal exclusion theory
C)  co-inclusion principle
D)  second law of thermodynamics
E)  competitive exclusion principleF) D) and E)
G) A) and B)

Question 18

Lichens live on the side of trees,obtaining better access to sunlight,and produce no harm to the tree.This is an example of

Accepted Answer

A)  commensalism.
B)  mutualism.
C)  parasitism.
D)  predation.
E)  herbivory.F) All of the above
G) B) and E)

Question 19

The Earth has a constant tilt of ______ on its axis from its plane of orbit.

Accepted Answer

A)  12.5 degrees
B)  23.5 degrees
C)  30 degrees
D)  9 degrees
E)  5.5 degreesF) A) and B)
G) A) and D)

Question 20

Some scientists predict that as atmospheric carbon dioxide levels increase,plant growth will also increase.What is the best explanation for this hypothesis?

Accepted Answer

A)  Plants consume carbon dioxide from the atmosphere during photosynthesis.
B)  Plants release carbon dioxide into the atmosphere during photosynthesis.
C)  Plants consume carbon dioxide from the atmosphere during respiration.
D)  Plants release carbon dioxide into the atmosphere during respiration.E) All of the above
F) B) and D)

Exam 19: Communities and Ecosystems

As temperatures in an African savanna increase and rainfall decreases,it would most likely change into

Correct AnswerverifiedShow Answer

The ______ states that two species cannot coexist indefinitely in the same niche.

Correct AnswerverifiedShow Answer

Tropical rainforest destruction threatens the global water cycle and carbon cycle.

Correct AnswerverifiedShow Answer

Lichens live on the side of trees,obtaining better access to sunlight,and produce no harm to the tree.This is an example of

Correct AnswerverifiedShow Answer

The "rain shadow" of a mountain is found on the leeward side of the mountain.

Correct AnswerverifiedShow Answer

In the section "Investigating Life: Two Kingdoms and a Virus Team Up to Beat the Heat",panic grass is a(n)

Correct AnswerverifiedShow Answer

The Earth has a constant tilt of ______ on its axis from its plane of orbit.

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Which of the following is NOT an abiotic component or condition of an ecosystem?

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A type of symbiosis in which both species benefit is

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The concentration of the pesticide DDT is likely highest in which of the following?

Correct AnswerverifiedShow Answer

Scientists reported that hurricane intensity has increased over the past 35 years,coinciding with increasing sea temperature.Why would climate change lead to an increase in hurricane intensity?

Correct AnswerverifiedShow Answer

______ bacteria return nitrogen to the atmosphere by converting nitrates to N2.

Correct AnswerverifiedShow Answer

Some scientists predict that as atmospheric carbon dioxide levels increase,plant growth will also increase.What is the best explanation for this hypothesis?

Correct AnswerverifiedShow Answer

Organisms that obtain their energy from producers or other consumers are

Correct AnswerverifiedShow Answer

Nitrogen-fixing bacteria in the roots of soybeans help provide a source of nitrogen to the plants,and in exchange,the bacteria obtain food from the plants.Which type of interaction is this?

Correct AnswerverifiedShow Answer

Mercury released from coal-burning power plants would be at the highest concentration in

Correct AnswerverifiedShow Answer

A type of symbiosis in which one member of the relationship benefits and the other is harmed is

Correct AnswerverifiedShow Answer

An insect that resembles the face of a snake is using ______ to avoid predation.

Correct AnswerverifiedShow Answer

If there are 10,000 calories of net primary productivity in an ecosystem,how much energy will be generally available to a primary consumer?

Correct AnswerverifiedShow Answer

In the section "Investigating Life: Two Kingdoms and a Virus Team Up to Beat the Heat",what was the purpose of repeatedly drying,freezing,and thawing some of the fungi?

Correct AnswerverifiedShow Answer

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______ bacteria return nitrogen to the atmosphere by converting nitrates to N₂.

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