Question 1

If a public health official was trying to reduce the potential for human exposure to a "red tide," which of the following actions would they take?

Accepted Answer

A)  place a ban on eating shellfish that were exposed to the dinoflagellate Alexandrium catanella
B)  decrease the amount of nutrients that are washed into the aquatic ecosystem
C)  ban swimming and other recreational activities in the area
D)  All of these actions would help reduce the potential for human exposure to a "red tide."E) A) and C)
F) A) and B)

Question 2

Each time a diatom reproduces sexually,the size of the daughter cells decreases until diatoms are about 30% of their original size.At this point,they begin to reproduce asexually.

Accepted Answer

A) True 
 B)False

Question 3

Amoebic dysentery is transmitted by (through)

Accepted Answer

A)  the bite of a mosquito.
B)  the bite of a tsetse fly.
C)  having sex with an infected partner.
D)  ingesting contaminated water or food.E) A) and B)
F) A) and C)

Question 4

Which of the following protozoans is mismatched with the disease that it causes?

Accepted Answer

A)  Trypanosoma brucei-sleeping sickness
B)  Trichomonas vaginalis-vaginitis and urethritis
C)  Entamoeba histolytica-amoebic dysentery
D)  Giardia lamblia-malariaE) B) and C)
F) All of the above

Question 5

This name of the filamentous algae pictured here,belonging to the supergroup Archaeplastida,is

Accepted Answer

A)  Ulva.
B)  Plasmodium.
C)  Chlamydomonas.
D)  Spirogyra.
E)  Volvox.F) B) and E)
G) C) and D)

Question 6

Which definition would best describe the mode of nutrition of Euglena?

Accepted Answer

A)  carnivorous
B)  decomposer
C)  heterotrophic
D)  photoautotrophic
E)  mixotrophicF) C) and E)
G) A) and B)

Question 7

Water molds are heterotrophic because they are parasitic on fish,plants,and insects.

Accepted Answer

A) True 
 B)False

Question 8

Slime molds were once classified as fungi.What characteristics of the slime molds distinguish them from fungi?

Accepted Answer

A)  Slime molds lack cell walls.
B)  They are flagellated cells at certain stages of the life cycle.
C)  The vegetative state of the slime mold is mobile and amoeboid.
D)  All of these characteristics distinguish slime molds from fungi.E) A) and B)
F) B) and C)

Question 9

Diatoms share a more recent common ancestor with dinoflagellates than with water molds.

Accepted Answer

A) True 
 B)False

Question 10

DNA sequencing suggests that among the green algae,the ________ are most closely related to land plants.

Accepted Answer

A)  Volvox
B)  Spirogyra
C)  Stoneworts
D)  Ulva
E)  ChlamydomonasF) B) and D)
G) C) and D)

Question 11

Which of the following pairs of protists would be most closely related due to both of them possessing plastids?

Accepted Answer

A)  archaeplastids & rhizaria
B)  archaeplastids & stramenopiles
C)  rhizaria & amoebozoans
D)  amoebozoans & excavatesE) A) and D)
F) None of the above

Question 12

Which organisms are classified as archaeplastids? Describe their mode of nutrition.

Accepted Answer

The archaeplastids consist of ...

Question 13

The most widely accepted formal classification of protists assigns them to

Accepted Answer

A)  the kingdom Protista.
B)  five different supergroups.
C)  domain Archaea.
D)  domain EubacteriaE) None of the above
F) C) and D)

Question 14

How are the archaeplastids similar to and different from the plants?

Accepted Answer

Biologists have long thought that the ar...

Question 15

Which description best supports the endosymbiotic theory of organelles?

Accepted Answer

A)  Eukaryotic cells acquired mitochondria and plastids by engulfing free-living bacteria and developed a symbiotic relationship with them.Mitochondria were derived from anaerobic bacterium while chloroplasts were derived from aerobic bacterium.
B)  Eukaryotic cells acquired mitochondria and plastids by engulfing free-living bacteria and developed a symbiotic relationship with them.Mitochondria were derived from aerobic bacterium while chloroplasts were derived from cyanobacterium.
C)  Eukaryotic cells acquired nuclei and flagella by engulfing free-living bacteria and developed a symbiotic relationship with them.Nuclei were derived from aerobic bacterium while flagella were derived from motile bacteria.
D)  Eukaryotic cells acquired mitochondria and flagella by engulfing free-living bacteria and developed a symbiotic relationship with them.Mitochondria were derived from aerobic bacterium while flagella were derived from motile bacteria.E) A) and D)
F) B) and C)

Question 16

The reason biologists believe that green algae and land plants,both members of the supergroup Archaeplastida,are related is because both of them possess chlorophyll a and b,as well as cell walls made of starch.

Accepted Answer

A) True 
 B)False

Question 17

Which feature has to be present in a protist in order to classify it as a photoautotroph?

Accepted Answer

A)  the presence of mitochondria within the cell
B)  the ability to synthesize organic compounds
C)  the presence of a light-trapping pigment
D)  the presence of cellulose in the cell wall
E)  the ability to synthesize inorganic compoundsF) All of the above
G) C) and D)

Question 18

Brown algae that live along the rocky shores of the north temperate zones are able to withstand pounding tides and drying because of their holdfasts and the water-retaining material in their cell walls.

Accepted Answer

A) True 
 B)False

Question 19

Which is NOT a feature found in protozoans?

Accepted Answer

A)  heterotrophic
B)  multicellular
C)  usually motile
D)  eukaryoticE) All of the above
F) C) and D)

Question 20

The members of the supergroup Archaeplastida that have cell walls impregnated with calcium carbonate and help build coral reefs are the

Accepted Answer

A)  diatoms.
B)  dinoflagellates.
C)  multicellular green algae.
D)  brown algae.
E)  red algae.F) C) and D)
G) A) and B)

Exam 21: Protist Evolution and Diversity

Amoebic dysentery is transmitted by (through)

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Each time a diatom reproduces sexually,the size of the daughter cells decreases until diatoms are about 30% of their original size.At this point,they begin to reproduce asexually.

Correct AnswerverifiedShow Answer

Which is NOT a feature found in protozoans?

Correct AnswerverifiedShow Answer

The reason biologists believe that green algae and land plants,both members of the supergroup Archaeplastida,are related is because both of them possess chlorophyll a and b,as well as cell walls made of starch.

Correct AnswerverifiedShow Answer

Brown algae that live along the rocky shores of the north temperate zones are able to withstand pounding tides and drying because of their holdfasts and the water-retaining material in their cell walls.

Correct AnswerverifiedShow Answer

Which definition would best describe the mode of nutrition of Euglena?

Correct AnswerverifiedShow Answer

Which organisms are classified as archaeplastids? Describe their mode of nutrition.

Correct AnswerverifiedThe archaeplastids consist of ...View AnswerShow Answer

This name of the filamentous algae pictured here,belonging to the supergroup Archaeplastida,is

Correct AnswerverifiedShow Answer

If a public health official was trying to reduce the potential for human exposure to a "red tide," which of the following actions would they take?

Correct AnswerverifiedShow Answer

Diatoms share a more recent common ancestor with dinoflagellates than with water molds.

Correct AnswerverifiedShow Answer

The most widely accepted formal classification of protists assigns them to

Correct AnswerverifiedShow Answer

How are the archaeplastids similar to and different from the plants?

Correct AnswerverifiedBiologists have long thought that the ar...View AnswerShow Answer

Which of the following protozoans is mismatched with the disease that it causes?

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Which of the following pairs of protists would be most closely related due to both of them possessing plastids?

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Slime molds were once classified as fungi.What characteristics of the slime molds distinguish them from fungi?

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DNA sequencing suggests that among the green algae,the ________ are most closely related to land plants.

Correct AnswerverifiedShow Answer

The members of the supergroup Archaeplastida that have cell walls impregnated with calcium carbonate and help build coral reefs are the

Correct AnswerverifiedShow Answer

Which description best supports the endosymbiotic theory of organelles?

Correct AnswerverifiedShow Answer

Water molds are heterotrophic because they are parasitic on fish,plants,and insects.

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Which feature has to be present in a protist in order to classify it as a photoautotroph?

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The archaeplastids consist of ...
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Biologists have long thought that the ar...
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