Question 1

Carbon dioxide,sulfur dioxide,methane,and nitrous oxide are believed to be _____ gases that could disrupt the temperature balance of the earth.

Accepted Answer

A)  active
B)  greenhouse
C)  noble
D)  inertE) B) and D)
F) All of the above

Question 2

Nutrient deficient aquatic ecosystems are called

Accepted Answer

A)  eutrophic.
B)  oligotrophic.
C)  epitrophic.
D)  hypotrophic.
E)  autotrophic.F) A) and C)
G) None of the above

Question 3

Which trophic level forms the base of a food chain?

Accepted Answer

A)  primary consumers
B)  quaternary consumers
C)  secondary consumers
D)  primary producers
E)  tertiary consumersF) B) and D)
G) C) and D)

Question 4

The metabolic process that uses carbon dioxide is:

Accepted Answer

A)  nitrification
B)  fermentation
C)  photosynthesis
D)  cell respirationE) B) and C)
F) C) and D)

Question 5

The physical location in the environment to which an organism has adapted is its

Accepted Answer

A)  niche.
B)  habitat.
C)  population.
D)  community.
E)  biome.F) B) and E)
G) A) and E)

Question 6

Which of the following is not true of the phosphorus cycle?

Accepted Answer

A)  phosphorus pool is in sedimentary rock
B)  released naturally by erosion and mining
C)  must be phosphatized to enter biological organisms
D)  mineralization occurs by microbes.
E)  Thiobacillus dissolves phosphate rock by producing sulfuric acid.F) None of the above
G) A) and B)

Question 7

Heterotrophs include

Accepted Answer

A)  producers,consumers,and decomposers.
B)  consumers and decomposers.
C)  producers only.
D)  consumers only.
E)  producers and consumers.F) B) and E)
G) A) and D)

Question 8

There are very few viruses in aquatic environments.

Accepted Answer

A) True 
 B)False

Question 9

The conversion of nitrate (NO3-) to nitrogen gas (N2) is called

Accepted Answer

A)  ammonification.
B)  nitrogen fixation.
C)  photosynthesis.
D)  nitrification.
E)  denitrification.F) A) and D)
G) A) and C)

Question 10

The conversion of gaseous nitrogen (N2) to ammonia (NH4+) occurs during

Accepted Answer

A)  ammonification.
B)  nitrogen fixation.
C)  photosynthesis.
D)  nitrification.
E)  denitrification.F) A) and C)
G) B) and D)

Question 11

You hare preparing a home garden and you want to provide the very best environment for your plants.Which of the following would you add to the potting soil while planting your garden plants?

Accepted Answer

A)  mycorrhizae inoculant
B)  sulfur oxidizers
C)  coliform bacteria like
D)  bacteriophages
E)  coliF) A) and E)
G) A) and D)

Question 12

The breakdown of man-made compounds by decomposers is called

Accepted Answer

A)  mineralization.
B)  bioremediation.
C)  decomposition.
D)  parasitism.
E)  saprobism.F) D) and E)
G) C) and D)

Question 13

The science called _________ involves the study of interactions between microbes and their environment and how those interactions affect the earth.

Accepted Answer

A)  applied microbiology
B)  biotechnology
C)  bioengineering
D)  microbial ecology
E)  industrial microbiologyF) C) and D)
G) A) and E)

Question 14

All of the following pertain to red tides except

Accepted Answer

A)  due to overgrowth of red algae in water.
B)  due to overgrowth of toxin-producing dinoflagellates.
C)  cause paralytic shellfish poisoning.
D)  involve toxin concentrating in shellfish.
E)  humans can become ill from eating the shellfish.F) B) and C)
G) A) and E)

Question 15

The warmest area of a lake during the summer is the

Accepted Answer

A)  epilimnion.
B)  thermocline.
C)  limnion.
D)  benthic zone.
E)  hypolimnion.F) A) and C)
G) B) and E)

Question 16

Which of the following genera is a nitrogen-fixing microbe that also photosynthesizes?

Accepted Answer

A)  Rhizobium
B)  Nitrobacter
C)  Pseudomonas
D)  Nostoc
E)  AzotobacterF) A) and D)
G) B) and E)

Question 17

Why are waterlogged soils often infertile?

Accepted Answer

A)  Nitrifying bacteria require oxygen,and the excess water takes the place of oxygen-containing air.
B)  Water molecules are used instead of oxygen for cell respiration.
C)  The lack of physical space in this type of soil blocks bacterial growth.
D)  There is less carbon in waterlogged soil than dry soil.E) A) and C)
F) A) and B)

Question 18

Mycorrhizae are the mutualistic relationship between fungi and the roots of certain plants.

Accepted Answer

A) True 
 B)False

Question 19

The total amount of water in the hydrologic cycle has been decreasing over the last million years.

Accepted Answer

A) True 
 B)False

Question 20

Organisms that inhabit soil or water,and breakdown and absorb the organic matter of dead organisms are called

Accepted Answer

A)  primary consumers.
B)  quaternary consumers.
C)  secondary consumers.
D)  decomposers.
E)  tertiary consumers.F) A) and E)
G) B) and E)

Exam 24: Microbes and the Environment

The metabolic process that uses carbon dioxide is:

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The total amount of water in the hydrologic cycle has been decreasing over the last million years.

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Which of the following is not true of the phosphorus cycle?

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All of the following pertain to red tides except

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The conversion of nitrate (NO3-) to nitrogen gas (N2) is called

Correct AnswerverifiedShow Answer

The science called _________ involves the study of interactions between microbes and their environment and how those interactions affect the earth.

Correct AnswerverifiedShow Answer

Nutrient deficient aquatic ecosystems are called

Correct AnswerverifiedShow Answer

There are very few viruses in aquatic environments.

Correct AnswerverifiedShow Answer

The conversion of gaseous nitrogen (N2) to ammonia (NH4+) occurs during

Correct AnswerverifiedShow Answer

Carbon dioxide,sulfur dioxide,methane,and nitrous oxide are believed to be _____ gases that could disrupt the temperature balance of the earth.

Correct AnswerverifiedShow Answer

The breakdown of man-made compounds by decomposers is called

Correct AnswerverifiedShow Answer

Organisms that inhabit soil or water,and breakdown and absorb the organic matter of dead organisms are called

Correct AnswerverifiedShow Answer

Mycorrhizae are the mutualistic relationship between fungi and the roots of certain plants.

Correct AnswerverifiedShow Answer

Which of the following genera is a nitrogen-fixing microbe that also photosynthesizes?

Correct AnswerverifiedShow Answer

The warmest area of a lake during the summer is the

Correct AnswerverifiedShow Answer

You hare preparing a home garden and you want to provide the very best environment for your plants.Which of the following would you add to the potting soil while planting your garden plants?

Correct AnswerverifiedShow Answer

Which trophic level forms the base of a food chain?

Correct AnswerverifiedShow Answer

The physical location in the environment to which an organism has adapted is its

Correct AnswerverifiedShow Answer

Heterotrophs include

Correct AnswerverifiedShow Answer

Why are waterlogged soils often infertile?

Correct AnswerverifiedShow Answer

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The conversion of nitrate (NO₃^-) to nitrogen gas (N₂) is called

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The conversion of gaseous nitrogen (N₂) to ammonia (NH₄⁺) occurs during

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