Question 1

A disease-causing bacterium may be protected from the immune system by a slippery

Accepted Answer

A)  pilus. 
B)  flagellum. 
C)  capsule. 
D)  cell wall. 
A)  pilus. 
B)  flagellum. 
C)  capsule. 
D)  cell wall. C

Question 2

Archaeans known as halophiles would most likely be found living in a(n)

Accepted Answer

A)  salt lake. 
B)  mineral hot spring. 
C)  deep-sea hydrothermal vent. 
D)  abandoned copper mine. 
A)  salt lake. 
B)  mineral hot spring. 
C)  deep-sea hydrothermal vent. 
D)  abandoned copper mine. A

Question 3

One of the earliest prokaryotes on Earth played an important role in the evolution of multicellular eukaryotes.These early prokaryotes changed Earth's chemistry when they began

Accepted Answer

A)  recycling nutrients locked in organic matter. 
B)  to produce oxygen as a by-product of photosynthesis. 
C)  capturing energy from inorganic iron ore. 
D)  to exist in oxygen-free environments. 
A)  recycling nutrients locked in organic matter. 
B)  to produce oxygen as a by-product of photosynthesis. 
C)  capturing energy from inorganic iron ore. 
D)  to exist in oxygen-free environments. B

Question 4

Explain how bacteria can incorporate a gene for antibiotic resistance from another bacterial cell.

Accepted Answer

Bacteria do not pick up genes from other

Question 5

Prokaryotes are capable of reproducing more rapidly than eukaryotes because prokaryotes

Accepted Answer

A)  have smaller ribosomes. 
B)  use asexual reproduction. 
C)  have less genetic material. 
D)  have more flexible plasma membranes. 
A)  have smaller ribosomes. 
B)  use asexual reproduction. 
C)  have less genetic material. 
D)  have more flexible plasma membranes.

Question 6

Match the prokaryotic cell structures with their functions.
-spins like a propeller to allow movement through a liquid environment

Accepted Answer

A) capsule 
B) pili 
C) flagella 
D) ribosomes 
E) DNA 
A) capsule 
B) pili 
C) flagella 
D) ribosomes 
E) DNA

Question 7

Determine whether a cell structure is found in prokaryotes only,eukaryotes only,or both prokaryotes and eukaryotes.
-membrane-enclosed organelles

Accepted Answer

A) prokaryotes only 
B) eukaryotes only 
C) both prokaryotes and eukaryotes 
A) prokaryotes only 
B) eukaryotes only 
C) both prokaryotes and eukaryotes

Question 8

Ben drinks directly out of a new milk container and then leaves the milk out of the refrigerator for at least an hour before remembering to put it away.The next morning,his roommate complains that the milk he just bought has already turned sour.Why did the milk turn sour more quickly than usual?

Accepted Answer

As the milk was sitting out of the refri

Question 9

Microbes that make up the domains Bacteria and Archaea are most similar in their

Accepted Answer

A)  DNA sequences. 
B)  plasma membrane structures. 
C)  metabolism. 
D)  lack of membrane-enclosed organelles. 
A)  DNA sequences. 
B)  plasma membrane structures. 
C)  metabolism. 
D)  lack of membrane-enclosed organelles.

Question 10

If the generation time for the bacterium shown in the figure below is 30 minutes,how much time will have gone by when the population has reached 1,000?

Accepted Answer

Five hours

Question 11

Which of these comparisons is correct?

Accepted Answer

A)  Eukaryotes are more abundant than prokaryotes. 
B)  Prokaryotes reproduce at a slower rate than eukaryotes. 
C)  Bacteria are more widespread than archaeans. 
D)  Prokaryotes show more diversity in metabolism than eukaryotes. 
A)  Eukaryotes are more abundant than prokaryotes. 
B)  Prokaryotes reproduce at a slower rate than eukaryotes. 
C)  Bacteria are more widespread than archaeans. 
D)  Prokaryotes show more diversity in metabolism than eukaryotes.

Question 12

Which of the following organisms found in the human microbiome is NOT known to be a pathogen?

Accepted Answer

A)  archaeans 
B)  gut bacteria 
C)  fungi 
D)  skin bacteria 
A)  archaeans 
B)  gut bacteria 
C)  fungi 
D)  skin bacteria

Question 13

What is the phenomenon referred to as dysbiosis? What problems may occur as a result of dysbiosis?

Accepted Answer

Dysbiosis is a term used when the health

Question 14

A bacterium that normally resides on human skin and does not cause disease has a very short generation time compared to disease-causing bacteria.How might this short generation time be beneficial to the human?

Accepted Answer

The bacterium with the short generation

Question 15

Citizens use an app to document the location of ash trees in their community.These citizen scientists are participating

Accepted Answer

A)  in data analysis. 
B)  in experimental design. 
C)  in data collection. 
D)  as experimental subjects. 
A)  in data analysis. 
B)  in experimental design. 
C)  in data collection. 
D)  as experimental subjects.

Question 16

If one forgets to brush his or her teeth,bacteria may use ________ to attach onto the surface of the teeth.

Accepted Answer

A)  flagella 
B)  pili 
C)  capsules 
D)  plasma membranes 
A)  flagella 
B)  pili 
C)  capsules 
D)  plasma membranes

Question 17

Escherichia coli,a bacterium that normally lives in the gut of humans,will have the shortest generation time when it is found

Accepted Answer

A)  on foods in a refrigerator set to a low temperature. 
B)  on the inside of a toilet at room temperature. 
C)  in an incubator set close to human body temperature. 
D)  on foods left out at room temperature. 
A)  on foods in a refrigerator set to a low temperature. 
B)  on the inside of a toilet at room temperature. 
C)  in an incubator set close to human body temperature. 
D)  on foods left out at room temperature.

Question 18

Bacteria and archaea are together referred to as ________.

Accepted Answer

The answer of Bacteria and archaea are together referred to...

Question 19

Match each term describing prokaryotes with ways of obtaining energy and carbon.
-a prokaryote that uses sunlight to obtain energy and takes in carbon dioxide to conduct photosynthesis

Accepted Answer

A) photoheterotroph 
B) chemoautotroph 
C) photoautotroph 
D) chemoheterotroph 
A) photoheterotroph 
B) chemoautotroph 
C) photoautotroph 
D) chemoheterotroph

Question 20

Individuals who participate in research as experimental subjects are

Accepted Answer

A)  data collectors. 
B)  citizen scientists. 
C)  professional scientists. 
D)  data analyzers. 
A)  data collectors. 
B)  citizen scientists. 
C)  professional scientists. 
D)  data analyzers.

Exam 15: Bacteria and Archaea

A disease-causing bacterium may be protected from the immune system by a slippery

Archaeans known as halophiles would most likely be found living in a(n)

One of the earliest prokaryotes on Earth played an important role in the evolution of multicellular eukaryotes.These early prokaryotes changed Earth's chemistry when they began

Explain how bacteria can incorporate a gene for antibiotic resistance from another bacterial cell.

Prokaryotes are capable of reproducing more rapidly than eukaryotes because prokaryotes

Match the prokaryotic cell structures with their functions. -spins like a propeller to allow movement through a liquid environment

Determine whether a cell structure is found in prokaryotes only,eukaryotes only,or both prokaryotes and eukaryotes. -membrane-enclosed organelles

Ben drinks directly out of a new milk container and then leaves the milk out of the refrigerator for at least an hour before remembering to put it away.The next morning,his roommate complains that the milk he just bought has already turned sour.Why did the milk turn sour more quickly than usual?

Microbes that make up the domains Bacteria and Archaea are most similar in their

If the generation time for the bacterium shown in the figure below is 30 minutes,how much time will have gone by when the population has reached 1,000?

Which of these comparisons is correct?

Which of the following organisms found in the human microbiome is NOT known to be a pathogen?

What is the phenomenon referred to as dysbiosis? What problems may occur as a result of dysbiosis?

A bacterium that normally resides on human skin and does not cause disease has a very short generation time compared to disease-causing bacteria.How might this short generation time be beneficial to the human?

Citizens use an app to document the location of ash trees in their community.These citizen scientists are participating

If one forgets to brush his or her teeth,bacteria may use ________ to attach onto the surface of the teeth.

Escherichia coli,a bacterium that normally lives in the gut of humans,will have the shortest generation time when it is found

Bacteria and archaea are together referred to as ________.

Match each term describing prokaryotes with ways of obtaining energy and carbon. -a prokaryote that uses sunlight to obtain energy and takes in carbon dioxide to conduct photosynthesis

Individuals who participate in research as experimental subjects are

The Nature of Science

Evaluating Scientific Claims

Chemistry of Life

Life Is Cellular

How Cells Work

Cell Division

Patterns of Inheritance

Chromosomes and Human Genetics

What Genes Are

How Genes Work

Evidence for Evolution

Mechanisms of Evolution

Adaptation and Species

The History of Life

Plants, Fungi, and Protists

Animals and Human Evolution

General Principles of Ecology

Growth of Populations

Communities of Organisms

Ecosystems

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