Question 1

The White Cliffs of Dover,a famous landmark in England,is made of limestone,which is really a collection of the pore-studded shells (tests) of

Accepted Answer

A)  diatoms.
B)  dinoflagellates.
C)  brown algae.
D)  spirochetes.
E)  foraminifera.F) B) and E)
G) A) and E)

Question 2

What features of charophytes provides evidence for charophytes being the closest 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) B) and D)
F) A) and B)

Question 3

A biologist uses a time machine to collect living material from 2 different time periods.Sample A is 3 billion years old and sample B is 1.5 billion years old.How would these samples differ?

Accepted Answer

A)  Prokaryotic organisms would be abundant in sample A but absent from sample B.
B)  Eukaryotic organisms would be present in both samples but much more common in sample B.
C)  Prokaryotic organisms would only occur in sample B.
D)  Eukaryotic organisms would be absent from sample A.E) None of the above
F) C) and D)

Question 4

During cell division the progeny of a trypanosome express a different VSG gene than their parents.Why is this done?

Accepted Answer

A)  To hide from the host's immune system.
B)  To signal endocytosis of the parasites.
C)  VSG genes inhibit phagocytosis.
D)  VSG genes activate photoheterotrophy.E) A) and C)
F) All of the above

Question 5

Which phrase best describes the characteristics of plasmodium?

Accepted Answer

A)  Plasmodial slime molds consist of large multinucleate single cells.
B)  Plasmodial slime molds consist of large single nucleate cells.
C)  Plasmodial slime molds are multicellular.
D)  Plasmodium cells contain a pellicle.E) B) and C)
F) A) and D)

Question 6

In addition to their characteristic cilia,most ciliates contain two types of

Accepted Answer

A)  nuclei.
B)  chloroplasts.
C)  flagella.
D)  wood-digesting enzymes.
E)  cysts.F) A) and E)
G) D) and E)

Question 7

The polysaccharides agarose and carrageenan are isolated from red algae for commercial use.These polysaccharides are found in cell walls.What plant polysaccharide are they analogous to?

Accepted Answer

A)  Amylose
B)  Collagen
C)  Cellulose
D)  elastin
E)  MannoseF) B) and E)
G) All of the above

Question 8

Conjugating ciliates exchange a pair of haploid micronuclei that undergo mitosis as a diploid micronucleus,while the macronucleus in each

Accepted Answer

A)  is expelled from the cell.
B)  disintegrates.
C)  divides by meiosis.
D)  fuses with each other.
E)  shrinks and becomes diploid micronuclei.F) B) and E)
G) B) and D)

Question 9

Which of the following statements about malaria is false?

Accepted Answer

A)  Fertilization occurs within a mosquito.
B)  Merozoites are found inside red blood cells.
C)  Gametocytes develop from merozoites.
D)  Sporozoites are only found within a mosquito.
E)  Gametocytes are passed to a feeding mosquito.F) A) and C)
G) B) and E)

Question 10

Which one of these groups is not one of the six supergroups that protists are contained in?

Accepted Answer

A)  Ascomycota
B)  Ophisthokonta
C)  Rhizaria
D)  Amoebozoa
E)  ArchaeplastidaF) C) and E)
G) C) and D)

Question 11

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) None of the above
F) All of the above

Question 12

Which of these is not part of the life cycle of brown algae?

Accepted Answer

A)  meiosis
B)  multicellular haploid stage
C)  multicellular diploid stage
D)  gametes produced by mitosis
E)  spores produced by mitosisF) A) and D)
G) A) and C)

Question 13

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) None of the above
F) A) and B)

Question 14

Which feature unites paramecia,malarial parasites,and dinoflagellates into a single group?

Accepted Answer

A)  The use of cilia
B)  A parasitic life style
C)  The presence of a nucleus
D)  The type of ribosomes
E)  The possession of alveoliF) B) and E)
G) A) and B)

Question 15

A patient,Jennifer,presents in an ER with severe stomach cramps and diarrhea.She was recently swimming in unclean water.Which protist would be the most likely cause of her symptoms?

Accepted Answer

A)  Toxoplasma gondii
B)  Plasmodium
C)  Leishmaniasis
D)  GiardiaE) B) and D)
F) B) and C)

Question 16

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 C)
F) C) and D)

Question 17

Protists are classified into a single kingdom because of which of the following features?

Accepted Answer

A)  They are eukaryotes,but not fungi,plants,or animals.
B)  They are microscopic.
C)  They are unicellular.
D)  All types of nutritional modes are found.
E)  They are monophyletic.F) A) and E)
G) B) and D)

Question 18

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 C)

Question 19

All apicomplexans are nonmotile,spore forming,and live as ________ in animals.

Accepted Answer

The answer of All apicomplexans are nonmotile,spore forming,and live as...

Question 20

The organism,Phytophthora infestans,responsible for the Irish Potato Famine of 1845 and 1847 belongs to

Accepted Answer

A)  Euglenozoa.
B)  Alveolata.
C)  Rhodophyta.
D)  Chlorophyta.
E)  Stramenopila.F) C) and D)
G) A) and D)

Exam 28: Protists

All apicomplexans are nonmotile,spore forming,and live as ________ in animals.

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

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Which of these is not part of the life cycle of brown algae?

Correct AnswerverifiedShow Answer

The White Cliffs of Dover,a famous landmark in England,is made of limestone,which is really a collection of the pore-studded shells (tests) of

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

During cell division the progeny of a trypanosome express a different VSG gene than their parents.Why is this done?

Correct AnswerverifiedShow Answer

Which feature unites paramecia,malarial parasites,and dinoflagellates into a single group?

Correct AnswerverifiedShow Answer

A patient,Jennifer,presents in an ER with severe stomach cramps and diarrhea.She was recently swimming in unclean water.Which protist would be the most likely cause of her symptoms?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Conjugating ciliates exchange a pair of haploid micronuclei that undergo mitosis as a diploid micronucleus,while the macronucleus in each

Correct AnswerverifiedShow Answer

The organism,Phytophthora infestans,responsible for the Irish Potato Famine of 1845 and 1847 belongs to

Correct AnswerverifiedShow Answer

Which one of these groups is not one of the six supergroups that protists are contained in?

Correct AnswerverifiedShow Answer

A biologist uses a time machine to collect living material from 2 different time periods.Sample A is 3 billion years old and sample B is 1.5 billion years old.How would these samples differ?

Correct AnswerverifiedShow Answer

Which of the following statements about malaria is false?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Protists are classified into a single kingdom because of which of the following features?

Correct AnswerverifiedShow Answer

In addition to their characteristic cilia,most ciliates contain two types of

Correct AnswerverifiedShow Answer

Which phrase best describes the characteristics of plasmodium?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The polysaccharides agarose and carrageenan are isolated from red algae for commercial use.These polysaccharides are found in cell walls.What plant polysaccharide are they analogous to?

Correct AnswerverifiedShow Answer

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