Question 1

Molecular evidence places fungi closer to animals than plants.

Accepted Answer

A) True 
 B)False

Question 2

Dictyostelium discoideum straddles the boundary between unicellular and multicellular.Its feeding phase consists of individual amoeba-like cells that move independently,feeding on bacteria.When the food runs out,cells begin to aggregate into a multicelled structure.The cells differentiate into a base,stalk,and spores;only the spores survive to colonize a new habitat.Dictyostelium discoideum is which of the following?

Accepted Answer

A)  an autotroph
B)  a heterotroph and autotroph
C)  a heterotroph
D)  a detritovore
E)  a heterotroph and detritovoreF) B) and C)
G) B) and D)

Question 3

A prokaryote that occupies a habitat that is extremely salty is a(an)

Accepted Answer

A)  thermophile.
B)  acidophile.
C)  halophile.
D)  basophile.
E)  hydrophilE.F) C) and E)
G) C) and D)

Question 4

Escherichia coli and Salmonella can remain in one location in our intestines.They would most likely contain which of the following?

Accepted Answer

A)  pili
B)  flagella
C)  cilia
D)  nuclei
E)  mitochondriaF) A) and E)
G) A) and D)

Question 5

What organic molecules likely existed before the first cell?

Accepted Answer

A)  nucleic acids
B)  lipids
C)  All answers are correct.
D)  proteins
E)  carbohydratesF) A) and B)
G) A) and C)

Question 6

Clostridium tetani,the bacterium that causes tetanus,can survive in soil for up to 40 years.It is most likely in which of the following structures?

Accepted Answer

A)  a cell membrane
B)  a nucleus
C)  a cell wall
D)  a pilus
E)  an endosporeF) A) and B)
G) A) and C)

Question 7

The main storage carbohydrate in fungi is

Accepted Answer

A)  glycogen.
B)  glucose.
C)  starch.
D)  cellulose.
E)  chitin.F) A) and E)
G) B) and C)

Question 8

Evidence supporting the idea that mitochondria and chloroplasts in present-day cells originated as independent organisms includes

Accepted Answer

A)  similarities in DNA sequences between mitochondrial and bacterial genomes.
B)  similarities in size and shape between mitochondria and some prokaryotes.
C)  similarity between photosynthetic pigments in chloroplasts and cyanobacteria.
D)  similarity in the way mitochondria,chloroplasts,and prokaryotes reproduce.
E)  All answers are correctF) D) and E)
G) B) and D)

Question 9

Escherichia coli and Salmonella can live in our intestines in the presence or absence of oxygen.They are considered

Accepted Answer

A)  obligate anaerobes.
B)  phototrophs.
C)  facultative anaerobes.
D)  autotrophs.
E)  aerobic.F) A) and C)
G) B) and D)

Question 10

Associations of fungi and plant roots are called

Accepted Answer

A)  pili.
B)  mycorrhizae.
C)  lichens.
D)  root forks.
E)  endophytes.F) C) and D)
G) A) and E)

Question 11

Silica walls are characteristic of

Accepted Answer

A)  diatoms.
B)  euglenoids.
C)  red algae.
D)  brown algae.
E)  slime molds.F) A) and B)
G) All of the above

Question 12

Antibiotics usually are not dangerous to use in treating bacterial infections because most antibiotics exploit structures and functions in bacteria that are not present in host cells.

Accepted Answer

A) True 
 B)False

Question 13

How did the first life on Earth obtain energy?

Accepted Answer

A)  photosynthesis in the presence of oxygen
B)  photosynthesis in the absence of oxygen
C)  heterotrophic consumption of organic molecules
D)  autotrophic consumption of organic molecules
E)  phototrophic consumption of inorganic moleculesF) B) and E)
G) A) and B)

Question 14

In the section "Investigating Life: The Battle for Position in Cacao Tree Leaves",the relationship between the cacao tree and its resident endophyte fungi is a ______ relationship.

Accepted Answer

A)  fungal loss: plant gain
B)  fungal gain: plant loss
C)  fungal loss: plant loss
D)  fungal gain: plant uneffected
E)  fungal gain: plant gainF) B) and D)
G) A) and C)

Question 15

Saccharomyces is commonly known as

Accepted Answer

A)  an antibiotic.
B)  the "death angel."
C)  mildew.
D)  yeast for making bread,wine,and beer.
E)  the common bread mold.F) B) and C)
G) B) and E)

Question 16

Which part of a fungus penetrates inside of a plant?

Accepted Answer

A)  hyphae
B)  fruiting bodies
C)  spores
D)  pili
E)  flagellaF) C) and D)
G) C) and E)

Question 17

About 80% of all land plants,including grasses,shrubs,and trees,form mycorrhizae.Mycorrhizae are which of the following?

Accepted Answer

A)  associations between fungi and plant leaves
B)  associations between fungi and plant roots
C)  associations between bacteria and plant leaves
D)  associations between bacteria and plant roots
E)  associations between bacteria and fungiF) D) and E)
G) A) and D)

Question 18

Water molds are unlike fungi in that water molds have cell walls containing cellulose,whereas fungi have cell walls containing chitin.

Accepted Answer

A) True 
 B)False

Question 19

Autotrophs must acquire carbon from organic molecules produced from other organisms.

Accepted Answer

A) True 
 B)False

Question 20

A dikaryotic stage is common in the life cycle of many plants,protozoans,and fungi.

Accepted Answer

A) True 
 B)False

Exam 15: Evolution and Diversity of Microbial Life

Evidence supporting the idea that mitochondria and chloroplasts in present-day cells originated as independent organisms includes

Correct Answer
verified

Water molds are unlike fungi in that water molds have cell walls containing cellulose,whereas fungi have cell walls containing chitin.

Correct Answer
verified

Associations of fungi and plant roots are called

Correct Answer
verified

A dikaryotic stage is common in the life cycle of many plants,protozoans,and fungi.

Correct Answer
verified

Silica walls are characteristic of

Correct Answer
verified

Which part of a fungus penetrates inside of a plant?

Correct Answer
verified

The main storage carbohydrate in fungi is

Correct Answer
verified

Autotrophs must acquire carbon from organic molecules produced from other organisms.

Correct Answer
verified

Escherichia coli and Salmonella can remain in one location in our intestines.They would most likely contain which of the following?

Correct Answer
verified

A prokaryote that occupies a habitat that is extremely salty is a(an)

Correct Answer
verified

What organic molecules likely existed before the first cell?

Correct Answer
verified

How did the first life on Earth obtain energy?

Correct Answer
verified

Correct Answer
verified

Escherichia coli and Salmonella can live in our intestines in the presence or absence of oxygen.They are considered

Correct Answer
verified

Molecular evidence places fungi closer to animals than plants.

Correct Answer
verified

In the section "Investigating Life: The Battle for Position in Cacao Tree Leaves",the relationship between the cacao tree and its resident endophyte fungi is a ______ relationship.

Correct Answer
verified

About 80% of all land plants,including grasses,shrubs,and trees,form mycorrhizae.Mycorrhizae are which of the following?

Correct Answer
verified

Antibiotics usually are not dangerous to use in treating bacterial infections because most antibiotics exploit structures and functions in bacteria that are not present in host cells.

Correct Answer
verified

Saccharomyces is commonly known as

Correct Answer
verified

Clostridium tetani,the bacterium that causes tetanus,can survive in soil for up to 40 years.It is most likely in which of the following structures?

Correct Answer
verified

Exam 15: Evolution and Diversity of Microbial Life

Evidence supporting the idea that mitochondria and chloroplasts in present-day cells originated as independent organisms includes

Correct AnswerverifiedShow Answer

Water molds are unlike fungi in that water molds have cell walls containing cellulose,whereas fungi have cell walls containing chitin.

Correct AnswerverifiedShow Answer

Associations of fungi and plant roots are called

Correct AnswerverifiedShow Answer

A dikaryotic stage is common in the life cycle of many plants,protozoans,and fungi.

Correct AnswerverifiedShow Answer

Silica walls are characteristic of

Correct AnswerverifiedShow Answer

Which part of a fungus penetrates inside of a plant?

Correct AnswerverifiedShow Answer

The main storage carbohydrate in fungi is

Correct AnswerverifiedShow Answer

Autotrophs must acquire carbon from organic molecules produced from other organisms.

Correct AnswerverifiedShow Answer

Escherichia coli and Salmonella can remain in one location in our intestines.They would most likely contain which of the following?

Correct AnswerverifiedShow Answer

A prokaryote that occupies a habitat that is extremely salty is a(an)

Correct AnswerverifiedShow Answer

What organic molecules likely existed before the first cell?

Correct AnswerverifiedShow Answer

How did the first life on Earth obtain energy?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Escherichia coli and Salmonella can live in our intestines in the presence or absence of oxygen.They are considered

Correct AnswerverifiedShow Answer

Molecular evidence places fungi closer to animals than plants.

Correct AnswerverifiedShow Answer

In the section "Investigating Life: The Battle for Position in Cacao Tree Leaves",the relationship between the cacao tree and its resident endophyte fungi is a ______ relationship.

Correct AnswerverifiedShow Answer

About 80% of all land plants,including grasses,shrubs,and trees,form mycorrhizae.Mycorrhizae are which of the following?

Correct AnswerverifiedShow Answer

Antibiotics usually are not dangerous to use in treating bacterial infections because most antibiotics exploit structures and functions in bacteria that are not present in host cells.

Correct AnswerverifiedShow Answer

Saccharomyces is commonly known as

Correct AnswerverifiedShow Answer

Clostridium tetani,the bacterium that causes tetanus,can survive in soil for up to 40 years.It is most likely in which of the following structures?

Correct AnswerverifiedShow Answer

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