Question 1

The ___________ are a group within the Euglenozoa that have a unique, single mitochondrion.

Accepted Answer

The answer of The ___________ are a group within the...

Question 2

Some protists use multiple fission (cell division preceded by several nuclear divisions)  as a means of reproduction.Multiple fission is also referred to as

Accepted Answer

A)  budding.
B)  zygotic meiosis.
C)  schizogony.
D)  syngamy.E) All of the above
F) A) and B) C

Question 3

Conjugation in most ciliates involves a series of steps that leads to increased genetic diversity.Which one of the following choices is not one of those steps?

Accepted Answer

A)  mitosis of a haploid nucleus
B)  mitosis of a diploid nucleus
C)  meiosis of a haploid nucleus
D)  meiosis of a diploid nucleusE) A) and B)
F) C) and D)

Question 4

A common characteristic of Choanoflagellida is

Accepted Answer

A)  a single, unique mitochondria.
B)  space beneath the plasma membrane.
C)  silica covering.
D)  funnel-shaped, contractile collar.E) B) and D)
F) C) and D)

Question 5

Amoebas move from place to place by means of their

Accepted Answer

A)  cysts.
B)  pseudopods.
C)  pseudomonads.
D)  sporocarps.E) B) and D)
F) All of the above

Question 6

What type of cellular damage in a malarial parasite would prevent it from penetrating a red blood cell?

Accepted Answer

A)  Mutation in the variable surface glycoprotein genes
B)  A disruption of the cytoskeletal proteins
C)  Failure of the cross-linking of the peptidoglycans
D)  Damage to the choanocytesE) A) and B)
F) A) and C)

Question 7

The unique double shells of diatoms are made of

Accepted Answer

A)  cellulose.
B)  silica.
C)  chlorophylls.
D)  agar.E) A) and B)
F) C) and D) B

Question 8

Which feature of mitochondria provides the least amount of information about their endosymbiotic origins?

Accepted Answer

A)  Circular chromosome
B)  Mode of replication
C)  Independent replication
D)  Phospholipids in the membranesE) A) and D)
F) B) and C)

Question 9

The parasite that is responsible for causing malaria is called

Accepted Answer

A)  Paramecium.
B)  Chlamydomonas.
C)  Plasmodium.
D)  Entamoeba.E) A) and C)
F) C) and D)

Question 10

Trypanosomiasis is spread by

Accepted Answer

A)  mosquitoes.
B)  airborne droplets.
C)  tsetse flies.
D)  fleas on rats.E) B) and D)
F) B) and C)

Question 11

Which one of the following statements about diplomonads and parabasilids is false?

Accepted Answer

A)  Absence of mitochondria in these groups is an ancestral trait.
B)  Some members are parasitic, but some also engage in mutualism.
C)   Diplomonads and parabasilids belong to different clades
D)  Both groups are flagellated protists.E) B) and D)
F) B) and C) A

Question 12

The concept of endosymbiosis is widely accepted.What kind of relationship is it?

Accepted Answer

A)  One organism in the partnership benefits and the other is harmed.
B)  Both organisms in the partnership benefit.
C)  Neither organism benefits.
D)  One organism benefits but the other is not affected.E) All of the above
F) A) and D)

Question 13

Vacuoles for ingesting food and regulating their water balance are characteristic of

Accepted Answer

A)  sporozoans.
B)  trypanosomes.
C)  ciliates.
D)  algae.E) None of the above
F) C) and D)

Question 14

How do protists provide evidence for the step-wise evolution of mitosis?

Accepted Answer

A)  In some protists the nuclear membrane fails to breakdown during mitosis.
B)  Protists use conjugation instead of mitosis.
C)  Only meiosis occurs in protists.
D)  Mitosis has not been observed in any protist species.E) A) and D)
F) A) and C)

Question 15

What features of charophytes provides evidence for charophytes being the closests relative to land plants?

Accepted Answer

A)  Charophytes possess plasmodesmata.
B)  Charophytes are the only photosynthetic protists.
C)  Charophytes are fully terrestrial.
D)  Charophytes produce seeds and flowers.E) A) and B)
F) A) and C)

Question 16

The Irish potato famine in the 1840's was caused in large part by a proliferation of a(n)

Accepted Answer

A)  Paramecia
B)  Oomycote
C)  Dinoflagellate
D)  ChlorophyteE) A) and C)
F) B) and C)

Question 17

Sponges (phylum: Porifera)  are animals that possess feeding cells called collar cells.These cells have a central flagellum surrounded by a collar of microvilli.The collar filters organic matter out of the water column.Which protist shares a more recent common ancestor with the poriferans?

Accepted Answer

A)  Ciliates
B)  Rhodophyta
C)  Choanoflagellates
D)  RadiolariansE) A) and B)
F) A) and D)

Question 18

The marine multicellular protists including the larger brown algae belong to the

Accepted Answer

A)  dinoflagellates.
B)  Choanoflagellida.
C)  Stramenopiles.
D)  euglenoids.E) All of the above
F) A) and B)

Question 19

Which of the following is not one of the distinctive features of dinoflagellates?

Accepted Answer

A)  They are unicellular.
B)  They are photosynthetic.
C)  Some exist in fresh water, while some are part of marine plankton.
D)  They form large, spherical colonies.E) A) and B)
F) B) and D)

Question 20

Which one of the following statements about the trypanosome causing African sleeping sickness does not explain why the disease has been difficult to control?

Accepted Answer

A)  Trypanosomes have a protective glycoprotein coat.
B)  Trypanosomes have many variable antigen genes.
C)  Rearrangement of antigen genes takes place during the asexual cycle.
D)  By infesting the red blood cells, trypanosomes can "hide" from the immune system.E) None of the above
F) A) and D)

Exam 29: Protists

The ___________ are a group within the Euglenozoa that have a unique, single mitochondrion.

Correct AnswerverifiedShow Answer

Some protists use multiple fission (cell division preceded by several nuclear divisions) as a means of reproduction.Multiple fission is also referred to as

Correct AnswerverifiedC

Conjugation in most ciliates involves a series of steps that leads to increased genetic diversity.Which one of the following choices is not one of those steps?

Correct AnswerverifiedShow Answer

A common characteristic of Choanoflagellida is

Correct AnswerverifiedShow Answer

Amoebas move from place to place by means of their

Correct AnswerverifiedShow Answer

What type of cellular damage in a malarial parasite would prevent it from penetrating a red blood cell?

Correct AnswerverifiedShow Answer

The unique double shells of diatoms are made of

Correct AnswerverifiedB

Which feature of mitochondria provides the least amount of information about their endosymbiotic origins?

Correct AnswerverifiedShow Answer

The parasite that is responsible for causing malaria is called

Correct AnswerverifiedShow Answer

Trypanosomiasis is spread by

Correct AnswerverifiedShow Answer

Which one of the following statements about diplomonads and parabasilids is false?

Correct AnswerverifiedA

The concept of endosymbiosis is widely accepted.What kind of relationship is it?

Correct AnswerverifiedShow Answer

Vacuoles for ingesting food and regulating their water balance are characteristic of

Correct AnswerverifiedShow Answer

How do protists provide evidence for the step-wise evolution of mitosis?

Correct AnswerverifiedShow Answer

What features of charophytes provides evidence for charophytes being the closests relative to land plants?

Correct AnswerverifiedShow Answer

The Irish potato famine in the 1840's was caused in large part by a proliferation of a(n)

Correct AnswerverifiedShow Answer

Sponges (phylum: Porifera) are animals that possess feeding cells called collar cells.These cells have a central flagellum surrounded by a collar of microvilli.The collar filters organic matter out of the water column.Which protist shares a more recent common ancestor with the poriferans?

Correct AnswerverifiedShow Answer

The marine multicellular protists including the larger brown algae belong to the

Correct AnswerverifiedShow Answer

Which of the following is not one of the distinctive features of dinoflagellates?

Correct AnswerverifiedShow Answer

Which one of the following statements about the trypanosome causing African sleeping sickness does not explain why the disease has been difficult to control?

Correct AnswerverifiedShow Answer

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B

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A

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