Question 1

Which of the following is NOT a free-floating photosynthetic organism found in a lake?

Accepted Answer

A)  phytoplankton
B)  green algae
C)  zooplankton
D)  cyanobacteria
E)  diatomF) A) and E)
G) B) and D)

Question 2

The upper and lower tidal zones in which the barnacles Balanus and Chthalamus thrive when both species are present illustrate the principle of

Accepted Answer

A)  symbiotic inclusion.
B)  parasitism.
C)  oceanic restriction.
D)  competitive exclusion.
E)  None of the answers are correct.F) A) and B)
G) C) and E)

Question 3

In ecology,a community that remains fairly constant over time is referred to as a

Accepted Answer

A)  successful community.
B)  climax community.
C)  keystone community.
D)  primary community.
E)  tertiary community.F) B) and E)
G) A) and B)

Question 4

Within convection cells,warm moist air rises from the equator and descends at 20-30 degrees from the equator.Convection cells are partially responsible for the distribution of which two biomes?

Accepted Answer

A)  tropical rain forests and temperate grasslands
B)  boreal forests and subtropical deserts
C)  tropical rain forests and subtropical deserts
D)  tropical rain forests and arctic tundra
E)  boreal forests and temperate forestsF) D) and E)
G) B) and D)

Question 5

An Arctic community affects the tundra ecosystem by

Accepted Answer

A)  the amount of waste it produces.
B)  the amount of oxygen it uses.
C)  All answers are correct.
D)  the amount of sunlight it captures for photosynthesis.
E)  the amount of habitat space it requires.F) C) and E)
G) None of the above

Question 6

Which of the following is NOT characteristic of a tropical rain forest?

Accepted Answer

A)  warm climate
B)  nutrient-rich soil
C)  a year-round growing season for plants
D)  a tremendous diversity of animal life
E)  a location near the equatorF) A) and E)
G) B) and E)

Question 7

All deserts are characterized by hot,dry climates.

Accepted Answer

A) True 
 B)False

Question 8

Carbon returns to the atmosphere

Accepted Answer

A)  as carbon dioxide.
B)  from respiration of plants.
C)  by the burning of fossil fuels.
D)  from respiration of animals.
E)  All answers are correct.F) B) and D)
G) B) and C)

Question 9

In the section "Investigating Life: Two Kingdoms and a Virus Team Up to Beat the Heat",what did the scientists conclude from the figure?

Accepted Answer

A)  Adding the virus back to virus-free fungi decreased plant survival.
B)  Infecting plants with the virus increased their survival.
C)  Infecting plants with the virus decreased their survival.
D)  Infecting the fungus with the virus allowed them to grow in the heat.
E)  Adding the virus back to virus-free fungi increased plant survival.F) A) and E)
G) B) and D)

Question 10

The yearly rainfall of a desert biome is

Accepted Answer

A)  150 to 200 centimeters per year.
B)  1 to 5 centimeters per year.
C)  less than 20 centimeters per year.
D)  more than 200 centimeters per year.
E)  50 to 100 centimeters per year.F) C) and D)
G) A) and B)

Question 11

The process by which liquid water becomes water vapor (a gas) is

Accepted Answer

A)  sublimation.
B)  condensation.
C)  convection.
D)  evaporation.
E)  All answers are correct.F) B) and E)
G) All of the above

Question 12

Resource partitioning allows only a single species to use a resource.

Accepted Answer

A) True 
 B)False

Question 13

As an overall average,about ______ of the energy at one trophic level is generally available to the next highest rank in the food chain.

Accepted Answer

A)  two percent
B)  ten percent
C)  four percent
D)  seven percent
E)  twenty percentF) All of the above
G) A) and C)

Question 14

In a decidous forest,for example,succession will always increase species richness.

Accepted Answer

A) True 
 B)False

Question 15

Which two parameters most influence the location of biomes?

Accepted Answer

A)  altitude and latitude
B)  latitude and temperature
C)  temperature and precipitation
D)  precipitation and altitude
E)  precipitation and latitudeF) B) and D)
G) A) and C)

Question 16

The rain shadow associated with mountains

Accepted Answer

A)  is on the downwind side and has a wetter climate than the upwind side of the mountain.
B)  is on the upwind side and has a drier climate than the downwind side of the mountain.
C)  is on the downwind side and has a drier climate than the upwind side of the mountain.
D)  is on the upwind side and has a wetter climate than the downwind side of the mountain.E) C) and D)
F) B) and D)

Question 17

What is a challenge that organisms living in an estuary face that other aquatic organisms normally do not face?

Accepted Answer

A)  changes in temperature at different depths
B)  daily changes in salinity
C)  movement of water
D)  light penetrating only through the photic zone
E)  damage from pollutionF) A) and C)
G) D) and E)

Question 18

The physical place where members of a population live is termed a

Accepted Answer

A)  competitive zone.
B)  community.
C)  habitat.
D)  symbiont.
E)  nichE.F) C) and E)
G) A) and B)

Question 19

An organism that can use solar energy and inorganic substances to produce all the organic material it requires is a(n)

Accepted Answer

A)  producer and heterotroph.
B)  heterotroph.
C)  autotroph and producer.
D)  autotroph.
E)  producer.F) A) and C)
G) A) and E)

Question 20

Tropical rain forest soils are usually

Accepted Answer

A)  nutrient-rich.
B)  low in organic matter.
C)  nutrient-poor and low in organic matter.
D)  nutrient-rich and low in organic matter.
E)  nutrient-poor.F) None of the above
G) C) and D)

Exam 19: Communities and Ecosystems

Within convection cells,warm moist air rises from the equator and descends at 20-30 degrees from the equator.Convection cells are partially responsible for the distribution of which two biomes?

Correct AnswerverifiedShow Answer

What is a challenge that organisms living in an estuary face that other aquatic organisms normally do not face?

Correct AnswerverifiedShow Answer

As an overall average,about ______ of the energy at one trophic level is generally available to the next highest rank in the food chain.

Correct AnswerverifiedShow Answer

Which of the following is NOT characteristic of a tropical rain forest?

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An organism that can use solar energy and inorganic substances to produce all the organic material it requires is a(n)

Correct AnswerverifiedShow Answer

In the section "Investigating Life: Two Kingdoms and a Virus Team Up to Beat the Heat",what did the scientists conclude from the figure?

Correct AnswerverifiedShow Answer

In a decidous forest,for example,succession will always increase species richness.

Correct AnswerverifiedShow Answer

Which two parameters most influence the location of biomes?

Correct AnswerverifiedShow Answer

All deserts are characterized by hot,dry climates.

Correct AnswerverifiedShow Answer

Which of the following is NOT a free-floating photosynthetic organism found in a lake?

Correct AnswerverifiedShow Answer

Carbon returns to the atmosphere

Correct AnswerverifiedShow Answer

The yearly rainfall of a desert biome is

Correct AnswerverifiedShow Answer

In ecology,a community that remains fairly constant over time is referred to as a

Correct AnswerverifiedShow Answer

The upper and lower tidal zones in which the barnacles Balanus and Chthalamus thrive when both species are present illustrate the principle of

Correct AnswerverifiedShow Answer

Resource partitioning allows only a single species to use a resource.

Correct AnswerverifiedShow Answer

An Arctic community affects the tundra ecosystem by

Correct AnswerverifiedShow Answer

The process by which liquid water becomes water vapor (a gas) is

Correct AnswerverifiedShow Answer

The rain shadow associated with mountains

Correct AnswerverifiedShow Answer

Tropical rain forest soils are usually

Correct AnswerverifiedShow Answer

The physical place where members of a population live is termed a

Correct AnswerverifiedShow Answer

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