Question 1

The structures of prokaryotes that are used to transfer DNA from one cell to another are

Accepted Answer

A)  sex pili.
B)  flagella.
C)  endospores.
D)  calcium carbonate threads.
E)  cilia.F) B) and E)
G) A) and B)

Question 2

Which protists produce much of the Earth's oxygen?

Accepted Answer

A)  amoeba
B)  slime molds
C)  algae
D)  protozoa
E)  radiolariansF) All of the above
G) A) and B)

Question 3

What was likely the first informational molecule of life?

Accepted Answer

A)  carbohydrates
B)  lipids
C)  proteins
D)  RNA
E)  DNAF) A) and D)
G) C) and E)

Question 4

The endoplasmic reticulum,Golgi body,and other membranous organelles of cells might have formed by numerous infoldings of the cell's outer membrane.

Accepted Answer

A) True 
 B)False

Question 5

A mushroom is a dikaryotic structure of Basidiomycota.

Accepted Answer

A) True 
 B)False

Question 6

The "endosymbiont theory" states that eukaryotic cells work together to form a multicellular organism.

Accepted Answer

A) True 
 B)False

Question 7

Microscopic reproductive cells produced by most fungi are

Accepted Answer

A)  hyphae.
B)  fruiting bodies.
C)  mycelia.
D)  gills.
E)  spores.F) B) and D)
G) C) and D)

Question 8

Slime molds may exist as either single amoeboid cells or large masses of cells that behave as one multicellular organism.

Accepted Answer

A) True 
 B)False

Question 9

DNA that is separate and apart from the chromosome in a prokaryote is a(n)

Accepted Answer

A)  ribosome.
B)  endospore.
C)  nucleus.
D)  nucleoiD.
E)  plasmid.F) B) and E)
G) C) and D)

Question 10

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 D)
G) C) and D)

Question 11

A substance produced by brown algae that is used as an emulsifying and thickening agent in many foods and other products is

Accepted Answer

A)  agar.
B)  red ooze.
C)  gelatin.
D)  carageenan.
E)  algin.F) None of the above
G) A) and D)

Question 12

In setting up a lab for a General Biology course,you are asked to match labels with a timeline on the wall.For "First Cells," you need to find a point on the timeline

Accepted Answer

A)  500 million years ago.
B)  1.2 billion years ago.
C)  two billion years ago.
D)  six billion years ago.
E)  four billion years ago.F) A) and E)
G) C) and D)

Question 13

Why do scientists hypothesize that RNA was the first form of genetic material?

Accepted Answer

A)  All answers are correct.
B)  RNA can catalyze reactions.
C)  RNA can store genetic information.
D)  RNA can self-replicate.
E)  RNA can use genetic information to make proteins.F) B) and D)
G) B) and C)

Question 14

You are examining samples from a site in a dry pond that alternates between freezing cold winters and hot dry summers.When you find dormant thick-walled structures,you suspect that these are from bacteria and are

Accepted Answer

A)  plasmids.
B)  pili.
C)  ribosomes.
D)  flagella.
E)  endospores.F) A) and C)
G) A) and B)

Question 15

After a haploid spore germinates,it then completes mitosis,forming hyphae.The resulting hyphae are

Accepted Answer

A)  diploid.
B)  dikaryotic.
C)  zygotes.
D)  gametes.
E)  haploid.F) A) and B)
G) A) and C)

Question 16

The region of a prokaryotic cell where the bacterial chromosome (DNA) is located in the

Accepted Answer

A)  cell membrane.
B)  nucleus.
C)  cell wall.
D)  nucleoiD.
E)  ribosomE.F) B) and E)
G) All of the above

Question 17

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

Accepted Answer

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

Question 18

Clays often have positively charged surfaces.How may this have been important in the formation of organic macromolecules?

Accepted Answer

A)  They are a source of ATP to run chemical reactions.
B)  They form covalent bonds with organic building blocks.
C)  They can form templates by binding organic building blocks.
D)  They are a source of oxygen to break down organic building blocks.
E)  They are formed from meteorites that carried organic molecules to Earth.F) B) and C)
G) A) and E)

Question 19

Cytoplasmic extensions by which some protozoa move are

Accepted Answer

A)  ciliA.
B)  flagella.
C)  pseudopodia.
D)  All answers are correct.
E)  pili.F) B) and C)
G) A) and D)

Question 20

Which theory explains the origin of chloroplasts and mitochondria?

Accepted Answer

A)  the theory of evolution
B)  the theory of natural selection
C)  the geologic time theory
D)  the cell theory
E)  the endosymbiont theoryF) All of the above
G) A) and B)

Exam 15: Evolution and Diversity of Microbial Life

A substance produced by brown algae that is used as an emulsifying and thickening agent in many foods and other products is

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

Microscopic reproductive cells produced by most fungi are

Correct AnswerverifiedShow Answer

The endoplasmic reticulum,Golgi body,and other membranous organelles of cells might have formed by numerous infoldings of the cell's outer membrane.

Correct AnswerverifiedShow Answer

The region of a prokaryotic cell where the bacterial chromosome (DNA) is located in the

Correct AnswerverifiedShow Answer

Which theory explains the origin of chloroplasts and mitochondria?

Correct AnswerverifiedShow Answer

In setting up a lab for a General Biology course,you are asked to match labels with a timeline on the wall.For "First Cells," you need to find a point on the timeline

Correct AnswerverifiedShow Answer

Clays often have positively charged surfaces.How may this have been important in the formation of organic macromolecules?

Correct AnswerverifiedShow Answer

The "endosymbiont theory" states that eukaryotic cells work together to form a multicellular organism.

Correct AnswerverifiedShow Answer

A mushroom is a dikaryotic structure of Basidiomycota.

Correct AnswerverifiedShow Answer

The structures of prokaryotes that are used to transfer DNA from one cell to another are

Correct AnswerverifiedShow Answer

Slime molds may exist as either single amoeboid cells or large masses of cells that behave as one multicellular organism.

Correct AnswerverifiedShow Answer

Why do scientists hypothesize that RNA was the first form of genetic material?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

After a haploid spore germinates,it then completes mitosis,forming hyphae.The resulting hyphae are

Correct AnswerverifiedShow Answer

You are examining samples from a site in a dry pond that alternates between freezing cold winters and hot dry summers.When you find dormant thick-walled structures,you suspect that these are from bacteria and are

Correct AnswerverifiedShow Answer

What was likely the first informational molecule of life?

Correct AnswerverifiedShow Answer

Cytoplasmic extensions by which some protozoa move are

Correct AnswerverifiedShow Answer

Which protists produce much of the Earth's oxygen?

Correct AnswerverifiedShow Answer

DNA that is separate and apart from the chromosome in a prokaryote is a(n)

Correct AnswerverifiedShow Answer

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