Question 1

Which environment represents the largest pool of microbial genes?

Accepted Answer

A)  humans and animals
B)  air
C)  soil
D)  oceans
E)  freshwater lakesF) C) and E)
G) A) and B)

Question 2

Organisms whose sole source of carbon for growth is CO2 are called

Accepted Answer

A)  lithotrophs.
B)  consumers.
C)  decomposers.
D)  saprophytes.
E)  autotrophs.F) B) and C)
G) C) and D)

Question 3

Which of the following genera can carry out denitrification to completion?

Accepted Answer

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

Question 4

What microorganisms would you pick as likely being present in high salt lakes and seas?

Accepted Answer

A)  Sulfobolus
B)  Rhizobium
C)  Archaea
D)  DesulfovibrioE) All of the above
F) A) and C)

Question 5

You have been diagnosed with a neurotoxic poisoning after having ingested an algal toxin,called brevetoxin,produced by Karenia brevis.In what food did you likely pick this pick up?

Accepted Answer

A)  freshwater trout
B)  tomatoes
C)  oysters
D)  canned tuna fishE) None of the above
F) A) and D)

Question 6

The bacterium Thiobacillus secretes sulfuric acid into the environment.

Accepted Answer

A) True 
 B)False

Question 7

Which of the following is involved in completing the sulfur cycle?

Accepted Answer

A)  Thiobacillus ferrooxidans
B)  Thiobacillus thiooxidans
C)  Nitrosococcus
D)  Desulfovibrio
E)  RhizobiumF) A) and C)
G) A) and B)

Question 8

Phytoplankton is composed of protozoa and small invertebrates.

Accepted Answer

A) True 
 B)False

Question 9

Which organism is a nitrogen fixing symbiont of legumes?

Accepted Answer

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

Question 10

Using microbes to break down or remove toxic wastes in water and soil is called

Accepted Answer

A)  decomposition.
B)  synergism.
C)  mineralization.
D)  bioremediation.
E)  recycling.F) A) and B)
G) A) and C)

Question 11

Thiobacillus thiooxidans is found in an environmental sample.Which of the following should then apply to this sample?

Accepted Answer

A)  contains lithotrophs
B)  may be obtained from mining drainage
C)  very acidic
D)  contains microbes that oxidize sulfur to sulfates
E)  All of the choices are correct.F) A) and E)
G) A) and D)

Question 12

The zone of soil around roots of plants is called the

Accepted Answer

A)  lithosphere.
B)  biosphere.
C)  ionosphere.
D)  rhizosphere.
E)  hydrosphere.F) B) and D)
G) A) and E)

Question 13

The study of the practical uses of microbes in various industries and technologies is

Accepted Answer

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

Question 14

The combustion of fossil fuels,such as coal,oil,and gas,have contributed to the steady increase in atmospheric CO2 gas over the last 25 years.

Accepted Answer

A) True 
 B)False

Question 15

Which of the following are primary photosynthesizers?

Accepted Answer

A)  cyanobacteria
B)  green sulfur bacteria
C)  purple sulfur bacteria
D)  purple nonsulfur bacteria
E)  All of the choices are correct.F) B) and E)
G) C) and D)

Question 16

The terrestrial realm of the biosphere is distributed into particular climatic regions called

Accepted Answer

A)  niches.
B)  habitats.
C)  populations.
D)  communities.
E)  biomes.F) A) and C)
G) B) and E)

Question 17

Which of the following is mismatched?

Accepted Answer

A)  parasitism - one organism benefits and the other is not affected in any way
B)  competition - one organism gives off substances that inhibit or kill other organisms
C)  predator - seeks out and ingests live prey
D)  scavengers - feed on live to dead cells and wastes
E)  mutualism - both organisms benefit from their associationF) A) and B)
G) A) and C)

Question 18

Toxic substances accumulate through natural trophic flow of an ecosystem.

Accepted Answer

A) True 
 B)False

Question 19

Which of the following harbor microbes producing methane?

Accepted Answer

A)  cow GI tract
B)  sheep GI tract
C)  goat GI tract
D)  All of the choices are correct.E) B) and C)
F) A) and D)

Question 20

Living or dead organisms that occupy an organism's habitat are called biotic factors.

Accepted Answer

A) True 
 B)False

Exam 24: Microbes and the Environment

Which of the following is involved in completing the sulfur cycle?

Correct AnswerverifiedShow Answer

Which of the following are primary photosynthesizers?

Correct AnswerverifiedShow Answer

Which environment represents the largest pool of microbial genes?

Correct AnswerverifiedShow Answer

The bacterium Thiobacillus secretes sulfuric acid into the environment.

Correct AnswerverifiedShow Answer

Which of the following is mismatched?

Correct AnswerverifiedShow Answer

Which of the following genera can carry out denitrification to completion?

Correct AnswerverifiedShow Answer

Thiobacillus thiooxidans is found in an environmental sample.Which of the following should then apply to this sample?

Correct AnswerverifiedShow Answer

You have been diagnosed with a neurotoxic poisoning after having ingested an algal toxin,called brevetoxin,produced by Karenia brevis.In what food did you likely pick this pick up?

Correct AnswerverifiedShow Answer

The combustion of fossil fuels,such as coal,oil,and gas,have contributed to the steady increase in atmospheric CO2 gas over the last 25 years.

Correct AnswerverifiedShow Answer

Toxic substances accumulate through natural trophic flow of an ecosystem.

Correct AnswerverifiedShow Answer

The zone of soil around roots of plants is called the

Correct AnswerverifiedShow Answer

Using microbes to break down or remove toxic wastes in water and soil is called

Correct AnswerverifiedShow Answer

The study of the practical uses of microbes in various industries and technologies is

Correct AnswerverifiedShow Answer

Phytoplankton is composed of protozoa and small invertebrates.

Correct AnswerverifiedShow Answer

Which organism is a nitrogen fixing symbiont of legumes?

Correct AnswerverifiedShow Answer

What microorganisms would you pick as likely being present in high salt lakes and seas?

Correct AnswerverifiedShow Answer

Living or dead organisms that occupy an organism's habitat are called biotic factors.

Correct AnswerverifiedShow Answer

The terrestrial realm of the biosphere is distributed into particular climatic regions called

Correct AnswerverifiedShow Answer

Which of the following harbor microbes producing methane?

Correct AnswerverifiedShow Answer

Organisms whose sole source of carbon for growth is CO2 are called

Correct AnswerverifiedShow Answer

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The combustion of fossil fuels,such as coal,oil,and gas,have contributed to the steady increase in atmospheric CO₂ gas over the last 25 years.

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Organisms whose sole source of carbon for growth is CO₂ are called

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