Question 1

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

Accepted Answer

A)   Sulfur oxidizers
B)   Coliform bacteria 
C)   Mycorrhizae inoculant
D)   BacteriophageE) A) and C)
F) C) and D)

Question 2

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

Accepted Answer

A)   populations
B)   communities
C)   habitats
D)   niches
E)   biomesF) A) and E)
G) All of the above

Question 3

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

Accepted Answer

A)   denitrification
B)   nitrogen fixation
C)   ammonification
D)   nitrification
E)   photosynthesisF) None of the above
G) A) and C)

Question 4

Which of the following statements regarding the phosphorus cycle is incorrect?

Accepted Answer

A)   Phosphorus is released naturally by mining.
B)   The phosphorus pool is in sedimentary rock.
C)   Phosphorus mineralization occurs by microbial action.
D)   Thiobacillus produces sulfuric acid that dissolves phosphate rock.
E)   Phosphorus must be phosphatized to enter biological systems.F) A) and E)
G) B) and D)

Question 5

Considering the human body as an ecosystem,which of the following statements is incorrect?

Accepted Answer

A)   The human ecosystem lacks an autotrophic niche.
B)   The microbiota in the human gut is comprised of heterotrophs.
C)   Microbes act as producers, consumers, and decomposers within the human ecosystem.
D)   Energy for the human microbiome derives exclusively from the food we eat.E) A) and B)
F) None of the above

Question 6

Looking at the use of antibiotics as growth promoters in livestock through the lens of "One Health," which of the following statements best describes the interrelationship of these components of the biosphere?

Accepted Answer

A)   Choosing a vegetarian lifestyle goes a long way to avoid risks associated with antibiotic-treated livestock.
B)   The broad range of antibiotics available will provide widespread protection from pathogenic microbes.
C)   Livestock can be more susceptible to infectious diseases because of the energy required for such rapid growth.
D)   Spontaneous antibiotic resistance that arises in animals can be rapidly spread to humans who work on factory farms.E) C) and D)
F) None of the above

Question 7

Which of the following statements regarding the infection of root hairs by Rhizobium species is incorrect?

Accepted Answer

A)   Nodules begin to form in the roots as both plant and bacterial partners differentiate.
B)   Attachment of Rhizobium cells to plant root hair cells induce curling of the root hair.
C)   This is a mutualistic relationship between plant and bacteria.
D)   The presence of Rhizobium triggers the formation of syncytial cells.E) A) and B)
F) C) and D)

Question 8

Why are waterlogged soils often infertile?

Accepted Answer

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

Question 9

Which of the following statements considering the human body as an ecosystem is incorrect?

Accepted Answer

A)   The skin, the gut, and the nasopharynx are all habitats.
B)   The microbes present in dental plaque constitute a community.
C)   Lactobacillus acidophilus and Lactobacillus jensenii are populations within the vaginal community.
D)   An infection can be considered a habitat's response to an alteration in environmental conditions.E) C) and D)
F) A) and B)

Question 10

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

Accepted Answer

A)   photosynthesis
B)   ammonification
C)   denitrification
D)   nitrogen fixation
E)   nitrificationF) None of the above
G) B) and E)

Question 11

Most of the organic sulfur is located in

Accepted Answer

A)   nucleotides and nucleic acids.
B)   monosaccharides and carbohydrates.
C)   amino acids and proteins.
D)   fatty acids and lipids.E) All of the above
F) A) and B)

Question 12

The advantage of nitrogen fixation to the host plant is

Accepted Answer

A)   the ability to synthesize amino acids and proteins from the ammonia produced.
B)   the production of nucleotides required for nucleic acid synthesis.
C)   the production of antibiotics that protect the plant against pathogenic soil bacteria.
D)   the ability to use nitrogen gas instead of oxygen gas in cellular respiration, particularly when the soil is compacted.E) B) and C)
F) A) and D)

Question 13

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

Accepted Answer

A)   Freshwater trout
B)   Canned tuna
C)   Oysters
D)   TomatoesE) A) and D)
F) A) and C)

Question 14

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

Accepted Answer

A)   bioremediation
B)   decomposition
C)   synergism
D)   recycling
E)   mineralizationF) A) and B)
G) B) and C)

Question 15

The thermocline is broken down by temperature changes that allow upwelling to occur.

Accepted Answer

A) True 
 B)False

Question 16

Which microorganism is considered phytoplankton?

Accepted Answer

A)   Cyanobacteria
B)   Mycorrhizae
C)   Nitrogen fixing bacteria
D)   Sulfate reducersE) All of the above
F) A) and D)

Exam 24: Microbes and the Environment

Most of the organic sulfur is located in

Correct Answer
verified

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

Correct Answer
verified

Which of the following statements regarding the phosphorus cycle is incorrect?

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

Looking at the use of antibiotics as growth promoters in livestock through the lens of "One Health," which of the following statements best describes the interrelationship of these components of the biosphere?

Correct Answer
verified

Considering the human body as an ecosystem,which of the following statements is incorrect?

Correct Answer
verified

The thermocline is broken down by temperature changes that allow upwelling to occur.

Correct Answer
verified

Which of the following statements considering the human body as an ecosystem is incorrect?

Correct Answer
verified

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

Correct Answer
verified

Why are waterlogged soils often infertile?

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

Which microorganism is considered phytoplankton?

Correct Answer
verified

The advantage of nitrogen fixation to the host plant is

Correct Answer
verified

Which of the following statements regarding the infection of root hairs by Rhizobium species is incorrect?

Correct Answer
verified

Exam 24: Microbes and the Environment

Most of the organic sulfur is located in

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following statements regarding the phosphorus cycle is incorrect?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Looking at the use of antibiotics as growth promoters in livestock through the lens of "One Health," which of the following statements best describes the interrelationship of these components of the biosphere?

Correct AnswerverifiedShow Answer

Considering the human body as an ecosystem,which of the following statements is incorrect?

Correct AnswerverifiedShow Answer

The thermocline is broken down by temperature changes that allow upwelling to occur.

Correct AnswerverifiedShow Answer

Which of the following statements considering the human body as an ecosystem is incorrect?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Why are waterlogged soils often infertile?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which microorganism is considered phytoplankton?

Correct AnswerverifiedShow Answer

The advantage of nitrogen fixation to the host plant is

Correct AnswerverifiedShow Answer

Which of the following statements regarding the infection of root hairs by Rhizobium species is incorrect?

Correct AnswerverifiedShow Answer

Correct Answer
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The conversion of gaseous nitrogen (N₂) to ammonia (NH₄⁺) occurs during ______.

Correct Answer
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Correct Answer
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Correct Answer
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The conversion of nitrate (NO₃^-) to nitrogen gas (N₂) is called ______.

Correct Answer
verified

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Correct Answer
verified

Correct Answer
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