Question 1

As temperatures in the Arctic rise,which of the following changes may occur?

Accepted Answer

A)  Tundra will be replaced by taigA.
B)  Taiga will be replaced by tundra.
C)  Temperate forest will be replaced by taiga.
D)  Tundra will be replaced by desert.
E)  Taiga will be replaced by temperate rain forest.F) A) and B)
G) A) and C)

Question 2

The diversity in a kelp forest community can be measured by

Accepted Answer

A)  the number of kelp living in the community.
B)  the number of fishes living in the community.
C)  the abiotic resources utilized by the community.
D)  the number of niches in the community.
E)  the number of different species of living organisms in the community.F) None of the above
G) B) and C)

Question 3

As you climb the mountain,why are the biomes changing?

Accepted Answer

A)  The air is thinner.
B)  The latitude is changing.
C)  More rain falls in a rain shadow.
D)  Some animals live better at higher elevations.
E)  It is colder.F) A) and D)
G) A) and B)

Question 4

A coral reef is a complex ______ of calcium carbonate shells that are home to microbes,algae,invertebrates,and fishes.

Accepted Answer

A)  ecosystem
B)  community
C)  biome
D)  population
E)  nicheF) B) and D)
G) A) and C)

Question 5

After a person has taken antibiotics to treat a yeast infection in the genitourinary tract,the yeast infection lessens and the microbes that are normally present reestablish themselves.The reason for the lessening of the yeast infection is explained by

Accepted Answer

A)  predation.
B)  symbiosis.
C)  the competitive exclusion principle.
D)  the co-inclusion principle.
E)  endosymbiosis.F) A) and D)
G) B) and D)

Question 6

A grassland biome

Accepted Answer

A)  consists of mostly coniferous trees.
B)  has nutrient-rich soil.
C)  has a long growing season.
D)  is warm and dry.
E)  consists of mosses and lichens.F) None of the above
G) A) and B)

Question 7

Which of the following ecosystems has a very high net primary productivity?

Accepted Answer

A)  desert
B)  tropical rain forest
C)  temperate forest
D)  boreal forest
E)  tundraF) C) and E)
G) A) and C)

Question 8

In the section "Investigating Life: Two Kingdoms and a Virus Team Up to Beat the Heat",how was the virus detected?

Accepted Answer

A)  by the presence of antibodies to the virus
B)  by the presence of double-stranded RNA
C)  by signs of infection
D)  by the ability to grow at 65 ∘\circ∘ C
E)  by the presence of viral proteins F) C) and D)
G) B) and E)

Question 9

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

Accepted Answer

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

Question 10

"Net primary productivity" is

Accepted Answer

A)  the amount of energy used in metabolism by producers.
B)  the amount of energy given off as heat by producers.
C)  the amount of energy trapped by the autotrophs of an ecosystem.
D)  the amount of energy available for consumers.
E)  the amount of energy used in metabolism by consumers.F) C) and D)
G) A) and D)

Question 11

A relationship between different species in which one species lives in or on another is

Accepted Answer

A)  resource partitioning.
B)  coevolution.
C)  symbiosis.
D)  predation.
E)  niche sharing.F) C) and D)
G) A) and B)

Question 12

Which of the following is NOT a characteristic of tundra?

Accepted Answer

A)  high latitude
B)  permafrost
C)  contains conifers
D)  contains mosses and lichens
E)  short growing season for plantsF) A) and B)
G) D) and E)

Question 13

Coral obtains energy

Accepted Answer

A)  by capturing and digesting small animals and through symbiosis with photosynthetic algae.
B)  by capturing and digesting small animals.
C)  through symbiosis with photosynthetic algae.
D)  by performing photosynthesis.
E)  by performing photosynthesis and capturing and digesting small animals.F) All of the above
G) C) and D)

Question 14

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

Accepted Answer

A)  a seagull
B)  a minnow
C)  a mosquito larvae
D)  algae
E)  planktonF) A) and E)
G) C) and D)

Question 15

The major types of ecosystems are termed

Accepted Answer

A)  habitats.
B)  niches.
C)  biospheres.
D)  terrestrial zones.
E)  biomes.F) B) and C)
G) A) and E)

Question 16

Biomagnification occurs with chemicals that

Accepted Answer

A)  dissolve in only acidic solvents.
B)  dissolve in water.
C)  are not readily degraded and dissolve in fat.
D)  are not readily degraded and dissolve in water.
E)  dissolve in only basic solvents.F) A) and B)
G) B) and D)

Question 17

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 reaction can these bacteria catalyze?

Accepted Answer

A)  nitrogen gas (N2) to nitrate (NO3) 
B)  ammonium (NH4+) to nitrate (NO3) 
C)  nitrogen gas (N2) to ammonium (NH4+) 
D)  nitrate (NO3) to ammonium (NH4+) 
E)  nitrate (NO3) to nitrogen gas (N2) F) C) and D)
G) C) and E)

Exam 19: Communities and Ecosystems

A relationship between different species in which one species lives in or on another is

Correct Answer
verified

As temperatures in the Arctic rise,which of the following changes may occur?

Correct Answer
verified

A grassland biome

Correct Answer
verified

"Net primary productivity" is

Correct Answer
verified

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 reaction can these bacteria catalyze?

Correct Answer
verified

After a person has taken antibiotics to treat a yeast infection in the genitourinary tract,the yeast infection lessens and the microbes that are normally present reestablish themselves.The reason for the lessening of the yeast infection is explained by

Correct Answer
verified

Which of the following ecosystems has a very high net primary productivity?

Correct Answer
verified

Which of the following is NOT a characteristic of tundra?

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

In the section "Investigating Life: Two Kingdoms and a Virus Team Up to Beat the Heat",how was the virus detected?

Correct Answer
verified

Coral obtains energy

Correct Answer
verified

The major types of ecosystems are termed

Correct Answer
verified

As you climb the mountain,why are the biomes changing?

Correct Answer
verified

A coral reef is a complex ______ of calcium carbonate shells that are home to microbes,algae,invertebrates,and fishes.

Correct Answer
verified

The diversity in a kelp forest community can be measured by

Correct Answer
verified

Biomagnification occurs with chemicals that

Correct Answer
verified

Exam 19: Communities and Ecosystems

A relationship between different species in which one species lives in or on another is

Correct AnswerverifiedShow Answer

As temperatures in the Arctic rise,which of the following changes may occur?

Correct AnswerverifiedShow Answer

A grassland biome

Correct AnswerverifiedShow Answer

"Net primary productivity" is

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 reaction can these bacteria catalyze?

Correct AnswerverifiedShow Answer

After a person has taken antibiotics to treat a yeast infection in the genitourinary tract,the yeast infection lessens and the microbes that are normally present reestablish themselves.The reason for the lessening of the yeast infection is explained by

Correct AnswerverifiedShow Answer

Which of the following ecosystems has a very high net primary productivity?

Correct AnswerverifiedShow Answer

Which of the following is NOT a characteristic of tundra?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

In the section "Investigating Life: Two Kingdoms and a Virus Team Up to Beat the Heat",how was the virus detected?

Correct AnswerverifiedShow Answer

Coral obtains energy

Correct AnswerverifiedShow Answer

The major types of ecosystems are termed

Correct AnswerverifiedShow Answer

As you climb the mountain,why are the biomes changing?

Correct AnswerverifiedShow Answer

A coral reef is a complex ______ of calcium carbonate shells that are home to microbes,algae,invertebrates,and fishes.

Correct AnswerverifiedShow Answer

The diversity in a kelp forest community can be measured by

Correct AnswerverifiedShow Answer

Biomagnification occurs with chemicals that

Correct AnswerverifiedShow 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

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified