Question 1

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) C) and D)
G) All of the above

Question 2

DNA sequence evidence suggests that plants,fungi,and animals arose from different lineages of unicellular protists.This suggests which of the following?

Accepted Answer

A)  Protists evolved before the other three kingdoms.
B)  Early ancestors to plants,fungi,and animals could interbreed.
C)  Multicellular organisms arose only once in evolutionary history.
D)  All unicellular organisms are now extinct.
E)  The animal,plant,and fungal kingdoms contain some single celled organisms.F) D) and E)
G) A) and B)

Question 3

Streptomyces are aerobic soil bacteria that produce over two-thirds of our antibiotics of natural origin.These antibiotics should also be effective in killing Streptomyces.

Accepted Answer

A) True 
 B)False

Question 4

Prokaryotes lack which of the following?

Accepted Answer

A)  a nucleus
B)  RNA
C)  DNA
D)  a cell membrane
E)  a cell wallF) B) and D)
G) C) and D)

Question 5

Trichonympha is a unicellular,flagellated protist that lives within termites and allows the termite to be able to "digest" wood.Trichonympha is which of the following?

Accepted Answer

A)  a dinoflagellate
B)  an alga
C)  a slime mold
D)  a diatom
E)  a protozoanF) C) and E)
G) B) and C)

Question 6

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 D)
G) B) and C)

Question 7

Which of the following is a difference between how a frog and chytridiomycetes obtain energy?

Accepted Answer

A)  Frogs ingest their food;chytridiomycetes secrete digestive enzymes.
B)  Chytridiomycetes ingest their food;frogs secrete digestive enzymes.
C)  Frogs are heterotrophs;chytridiomycetes are phototrophs.
D)  Chytridiomycetes are heterotrophs;frogs are phototrophs.
E)  Frogs are autotrophs;chytridiomycetes are phototrophs.F) B) and D)
G) A) and B)

Question 8

Yeasts are

Accepted Answer

A)  multicelled autotrophs.
B)  single-celled heterotrophs.
C)  single-celled autotrophs.
D)  multicelled heterotrophs.
E)  All answers are correct.F) B) and C)
G) A) and E)

Question 9

A lichen is made up of which two types of organisms?

Accepted Answer

A)  a fungus and a plant
B)  a plant and a cyanobacterium
C)  a fungus and an alga or cyanobacterium
D)  an alga and a bacterium
E)  an alga and a plantF) A) and E)
G) B) and D)

Question 10

In the section "Investigating Life: The Battle for Position in Cacao Tree Leaves",endophytes that colonize a leaf get "first dibs" on the dead tissue.This is which type of feeding?

Accepted Answer

A)  decomposers
B)  detritovores
C)  herbivores
D)  carnivores
E)  producersF) C) and E)
G) None of the above

Question 11

Mitochondria evolved before chloroplasts based on which observation?

Accepted Answer

A)  Mitochondria produced the oxygen found in the atmosphere.
B)  Almost all organisms have mitochondria.
C)  All eukaryotes have mitochondria,but not chloroplasts.
D)  All prokaryotes have mitochondria,but not chloroplasts.
E)  Mitochondria are larger than chloroplasts.F) A) and D)
G) A) and C)

Question 12

Which of the following is not a similarity supporting the endosymbiont theory?

Accepted Answer

A)  similarity in the DNA of mitochondria and prokaryotes
B)  similarity in the nucleus of prokaryotes and mitochondria
C)  similarity in the RNA of mitochondria and prokaryotes
D)  similarity in the ribosomes of mitochondria and prokaryotes
E)  All answers support the endosymbiont theory.F) A) and B)
G) D) and E)

Question 13

Infections by Heliobacter pylori cause 90% of peptic ulcers in the U.S.These bacteria have pili that are expressed in acidic conditions.A characteristic of this organism is

Accepted Answer

A)  an ability to attach to cells in the host organism's stomach.
B)  an ability to move in the direction opposite the pili.
C)  an ability to avoid ingestion by cells in the immune system.
D)  an ability to induce a large antibody response.
E)  an ability to enter the blood stream.F) A) and E)
G) B) and C)

Question 14

Cryptosporidium is an apicomplexan that can contaminate water supplies.Which of the following would you predict to be the case of a Cryptosporidium outbreak?

Accepted Answer

A)  It can be transmitted only by insect bites because it is nonmotile.
B)  It can grow in any water supply because it is photosynthetic.
C)  It will be difficult to treat with chlorine because it forms spores.
D)  It spreads rapidly because it has flagella.
E)  It will enter a person's body through their respiratory tract.F) All of the above
G) D) and E)

Question 15

Diatoms and brown algae contain yellowish photosynthetic pigments.

Accepted Answer

A) True 
 B)False

Question 16

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) A) and B)
G) A) and C)

Question 17

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) A) and E)
G) A) and B)

Question 18

Protists can be autotrophs.

Accepted Answer

A) True 
 B)False

Question 19

In the section "Investigating Life: The Battle for Position in Cacao Tree Leaves",an endophyte absorbs nutrients and water from a live cacao leaf in what type of feeding?

Accepted Answer

A)  a decomposer
B)  an autotroph
C)  a detritovore
D)  a producer
E)  a heterotrophF) C) and E)
G) C) and D)

Question 20

Yeasts are multicellular fungi.

Accepted Answer

A) True 
 B)False

Exam 15: Evolution and Diversity of Microbial Life

Diatoms and brown algae contain yellowish photosynthetic pigments.

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Prokaryotes lack which of the following?

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Which of the following is a difference between how a frog and chytridiomycetes obtain energy?

Correct AnswerverifiedShow Answer

Cryptosporidium is an apicomplexan that can contaminate water supplies.Which of the following would you predict to be the case of a Cryptosporidium outbreak?

Correct AnswerverifiedShow Answer

Infections by Heliobacter pylori cause 90% of peptic ulcers in the U.S.These bacteria have pili that are expressed in acidic conditions.A characteristic of this organism is

Correct AnswerverifiedShow Answer

Protists can be autotrophs.

Correct AnswerverifiedShow Answer

In the section "Investigating Life: The Battle for Position in Cacao Tree Leaves",endophytes that colonize a leaf get "first dibs" on the dead tissue.This is which type of feeding?

Correct AnswerverifiedShow Answer

Trichonympha is a unicellular,flagellated protist that lives within termites and allows the termite to be able to "digest" wood.Trichonympha is which of the following?

Correct AnswerverifiedShow Answer

In the section "Investigating Life: The Battle for Position in Cacao Tree Leaves",an endophyte absorbs nutrients and water from a live cacao leaf in what type of feeding?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

A lichen is made up of which two types of organisms?

Correct AnswerverifiedShow Answer

Yeasts are multicellular fungi.

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Streptomyces are aerobic soil bacteria that produce over two-thirds of our antibiotics of natural origin.These antibiotics should also be effective in killing Streptomyces.

Correct AnswerverifiedShow Answer

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

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

Yeasts are

Correct AnswerverifiedShow Answer

Which of the following is not a similarity supporting the endosymbiont theory?

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Mitochondria evolved before chloroplasts based on which observation?

Correct AnswerverifiedShow Answer

Fungi are classified into phyla based on which characteristic?

Correct AnswerverifiedShow Answer

DNA sequence evidence suggests that plants,fungi,and animals arose from different lineages of unicellular protists.This suggests which of the following?

Correct AnswerverifiedShow Answer

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