Question 1

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) None of the above

Question 2

Where in a diatom would you find its yellowish photosynthetic pigment?

Accepted Answer

A)  in the plasma membrane
B)  in the cytoplasm
C)  in the cell wall
D)  in the nucleus
E)  in chloroplastsF) C) and E)
G) A) and E)

Question 3

Chlamydomonas is unicellular and photosynthetic.Chlamydomonas is which of the following?

Accepted Answer

A)  a slime mold
B)  an apicomplexan
C)  an amoeba
D)  a protozoan
E)  a green algaF) B) and E)
G) D) and E)

Question 4

When testing a sample of cells for preferred growing conditions,you find that they are obligate for growth in high concentrations of salt.These are probably bacteria.

Accepted Answer

A) True 
 B)False

Question 5

A prokaryote that occupies a habitat consisting of a low pH is a(n)

Accepted Answer

A)  thermophile.
B)  halophile.
C)  basophile.
D)  acidophile.
E)  hydrophilE.F) B) and E)
G) All of the above

Question 6

Silica walls are characteristic of

Accepted Answer

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

Question 7

Many drugs are produced by placing human genes into bacteria.The bacteria then transcribe and translate these genes into functional human proteins that can then be purified and given as drugs.The fact that this process works is consistent with which hypothesis?

Accepted Answer

A)  Bacteria have evolved to mimic human cells.
B)  Bacteria cannot divide unless they are inside a host cell.
C)  Humans and bacteria share a common ancestor.
D)  Bacteria need to make human proteins to live inside the human body.
E)  Humans and bacteria use different genetic material.F) C) and D)
G) A) and D)

Question 8

Fungi are classified into phyla based on which characteristic?

Accepted Answer

A)  organelles
B)  composition of cell wall
C)  photosynthesis
D)  reproductive structures
E)  multicellular vs.unicellularF) None of the above
G) All of the above

Question 9

A jellylike substance produced by red algae and used as a culture medium for microorganisms is

Accepted Answer

A)  red ooze.
B)  All answers are correct.
C)  gelatin.
D)  agar.
E)  algin.F) B) and D)
G) C) and D)

Question 10

RNA was the first molecule carrying genetic information.

Accepted Answer

A) True 
 B)False

Question 11

The first life on Earth was probably most similar to modern-day

Accepted Answer

A)  bacteriA.
B)  protists.
C)  Archaeans.
D)  plants.
E)  fungi.F) B) and C)
G) B) and E)

Question 12

Why are lichens a good indicator of environmental quality?

Accepted Answer

A)  They cannot absorb toxins.
B)  If the air is polluted they cannot get enough sunlight for photosynthesis.
C)  They cannot excrete absorbed toxins.
D)  If the soil is polluted they cannot produce roots.
E)  Toxins inhibit their reproduction.F) B) and D)
G) A) and D)

Question 13

Fungi and animals are similar because they both

Accepted Answer

A)  are phototrophs.
B)  have cell walls made of chitin.
C)  are heterotrophs.
D)  use starch as their main storage carbohydrate.
E)  are decomposers.F) All of the above
G) C) and D)

Question 14

Diatoms and brown algae contain yellowish photosynthetic pigments.

Accepted Answer

A) True 
 B)False

Question 15

Associations of fungi and plant roots are called

Accepted Answer

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

Question 16

The fusion of two haploid hyphae whereby the nuclei remain separate in the cell creates a ______ cell.

Accepted Answer

A)  dikaryotic
B)  haploid
C)  tetraploid
D)  diploid
E)  uniploidF) D) and E)
G) A) and B)

Question 17

Many prokaryotes play vital roles in global nutrient cycles.

Accepted Answer

A) True 
 B)False

Question 18

In fungi,a mass of aggregated hyphae is called a(n)

Accepted Answer

A)  mycelium.
B)  pilus.
C)  gill.
D)  spore.
E)  ascus.F) C) and D)
G) D) and E)

Question 19

Chloroplasts arose by endosymbiosis of a(an)

Accepted Answer

A)  aerobic bacterium.
B)  photosynthetic bacterium.
C)  anaerobic bacterium.
D)  aerobic archaeon.
E)  photosynthetic archaeon.F) B) and D)
G) A) and E)

Question 20

Dictyostelium discoideum initially consists of individual amoeba-like cells that move independently,feeding on bacteria.When the food runs out,cells begin to aggregate to produce spores.Dictyostelium discoideum is which kind of organism?

Accepted Answer

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

Exam 15: Evolution and Diversity of Microbial Life

Chloroplasts arose by endosymbiosis of a(an)

Correct AnswerverifiedShow Answer

Where in a diatom would you find its yellowish photosynthetic pigment?

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

A prokaryote that occupies a habitat consisting of a low pH is a(n)

Correct AnswerverifiedShow Answer

Chlamydomonas is unicellular and photosynthetic.Chlamydomonas is which of the following?

Correct AnswerverifiedShow Answer

The first life on Earth was probably most similar to modern-day

Correct AnswerverifiedShow Answer

RNA was the first molecule carrying genetic information.

Correct AnswerverifiedShow Answer

Fungi and animals are similar because they both

Correct AnswerverifiedShow Answer

A jellylike substance produced by red algae and used as a culture medium for microorganisms is

Correct AnswerverifiedShow Answer

Many prokaryotes play vital roles in global nutrient cycles.

Correct AnswerverifiedShow Answer

Associations of fungi and plant roots are called

Correct AnswerverifiedShow Answer

When testing a sample of cells for preferred growing conditions,you find that they are obligate for growth in high concentrations of salt.These are probably bacteria.

Correct AnswerverifiedShow Answer

Fungi are classified into phyla based on which characteristic?

Correct AnswerverifiedShow Answer

Silica walls are characteristic of

Correct AnswerverifiedShow Answer

In fungi,a mass of aggregated hyphae is called a(n)

Correct AnswerverifiedShow Answer

Why are lichens a good indicator of environmental quality?

Correct AnswerverifiedShow Answer

Many drugs are produced by placing human genes into bacteria.The bacteria then transcribe and translate these genes into functional human proteins that can then be purified and given as drugs.The fact that this process works is consistent with which hypothesis?

Correct AnswerverifiedShow Answer

Diatoms and brown algae contain yellowish photosynthetic pigments.

Correct AnswerverifiedShow Answer

Dictyostelium discoideum initially consists of individual amoeba-like cells that move independently,feeding on bacteria.When the food runs out,cells begin to aggregate to produce spores.Dictyostelium discoideum is which kind of organism?

Correct AnswerverifiedShow Answer

The fusion of two haploid hyphae whereby the nuclei remain separate in the cell creates a ______ cell.

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified