Question 1

Microbial eukaryotes are found in which of the following habitats?

Accepted Answer

A)  Marine habitats 
B)  Freshwater aquatic habitats 
C)  The body fluids of other organisms 
D)  Damp soil 
E)  All of the above 
A)  Marine habitats 
B)  Freshwater aquatic habitats 
C)  The body fluids of other organisms 
D)  Damp soil 
E)  All of the above

Question 2

Which of the following is not a characteristic of the brown algae?

Accepted Answer

A)  Leaflike growths called thalli 
B)  Storage of the products of photosynthesis as floridean starch 
C)  A specialized holdfast that aids in attachment to a surface 
D)  The presence of the carotenoid fucoxanthin in their chloroplasts 
E)  Multicellularity 
A)  Leaflike growths called thalli 
B)  Storage of the products of photosynthesis as floridean starch 
C)  A specialized holdfast that aids in attachment to a surface 
D)  The presence of the carotenoid fucoxanthin in their chloroplasts 
E)  Multicellularity

Question 3

The signal responsible for the aggregation of myxamoebas is

Accepted Answer

A)  the onset of adverse conditions. 
B)  alginic acid. 
C)  phycoerythrin. 
D)  actin. 
E)  None of the above 
A)  the onset of adverse conditions. 
B)  alginic acid. 
C)  phycoerythrin. 
D)  actin. 
E)  None of the above

Question 4

Which of the following statements about paramecia is false?

Accepted Answer

A)  They reproduce sexually by conjugation. 
B)  They have a pellicle. 
C)  They have more than one nucleus. 
D)  They are ciliates. 
E)  They have contractile vacuoles. 
A)  They reproduce sexually by conjugation. 
B)  They have a pellicle. 
C)  They have more than one nucleus. 
D)  They are ciliates. 
E)  They have contractile vacuoles.

Question 5

Which of the following modes of reproduction can be found in at least some protists?

Accepted Answer

A)  Binary fission 
B)  Sexual reproduction 
C)  Spore formation 
D)  Multiple fission 
E)  All of the above 
A)  Binary fission 
B)  Sexual reproduction 
C)  Spore formation 
D)  Multiple fission 
E)  All of the above

Question 6

Ciliates, as represented by Paramecium, have defensive organelles called _______ in their pellicles.

Accepted Answer

A)  trichonympha 
B)  tridents 
C)  trichomes 
D)  trichocysts 
E)  trochlea 
A)  trichonympha 
B)  tridents 
C)  trichomes 
D)  trichocysts 
E)  trochlea

Question 7

Plasmodium, the organism that causes malaria, is a member of the

Accepted Answer

A)  alveolates. 
B)  stramenopiles. 
C)  apicomplexans. 
D)  choanoflagellates. 
E)  None of the above 
A)  alveolates. 
B)  stramenopiles. 
C)  apicomplexans. 
D)  choanoflagellates. 
E)  None of the above

Question 8

Holdfasts and alginic acid are characteristic of which group of protists?

Accepted Answer

A)  Parabasalids 
B)  Red algae 
C)  Brown algae 
D)  Stramenopiles 
E)  Unikonts 
A)  Parabasalids 
B)  Red algae 
C)  Brown algae 
D)  Stramenopiles 
E)  Unikonts

Question 9

Use the following to answer questions :
Refer to the diagram below.  
-Which letter(s) point(s) to the cyanobacterium inner membrane?

Accepted Answer

The answer of Use the following to answer questions :
Refer...

Question 10

Paramecia have an elaborate sexual behavior in which they line up against each other and fuse. This is followed by an extensive reorganization and exchange of nuclear material. The entire process is called

Accepted Answer

A)  isogamous reproduction. 
B)  alternation of generations. 
C)  sexual reproduction. 
D)  conjugation. 
E)  None of the above 
A)  isogamous reproduction. 
B)  alternation of generations. 
C)  sexual reproduction. 
D)  conjugation. 
E)  None of the above

Question 11

All eukaryotes that are not plants, fungi, or animals have traditionally been called _______.

Accepted Answer

The answer of All eukaryotes that are not plants, fungi,...

Question 12

In the alternation of generations, the

Accepted Answer

A)  haploid generation produces spores. 
B)  diploid generation produces gametes. 
C)  haploid and diploid organisms always resemble each other. 
D)  diploid organism produces spores. 
E)  haploid organism produces gametes by meiosis. 
A)  haploid generation produces spores. 
B)  diploid generation produces gametes. 
C)  haploid and diploid organisms always resemble each other. 
D)  diploid organism produces spores. 
E)  haploid organism produces gametes by meiosis.

Question 13

The photosynthetic stramenopiles obtained their chloroplasts, which are surrounded by three membranes, through

Accepted Answer

A)  primary endosymbiosis. 
B)  secondary endosymbiosis, retaining the chloroplast from a red alga. 
C)  secondary endosymbiosis, retaining the chloroplast from a chlorophyte. 
D)  tertiary endosymbiosis. 
E)  None of the above 
A)  primary endosymbiosis. 
B)  secondary endosymbiosis, retaining the chloroplast from a red alga. 
C)  secondary endosymbiosis, retaining the chloroplast from a chlorophyte. 
D)  tertiary endosymbiosis. 
E)  None of the above

Question 14

The diatoms

Accepted Answer

A)  are a paraphyletic group. 
B)  form cell walls containing CaCO3. 
C)  would likely be found in the deep ocean. 
D)  are primary producers. 
E)  are responsible for a small fraction of photosynthetic CO2 fixation. 
A)  are a paraphyletic group. 
B)  form cell walls containing CaCO3. 
C)  would likely be found in the deep ocean. 
D)  are primary producers. 
E)  are responsible for a small fraction of photosynthetic CO2 fixation.

Question 15

Microbial eukaryotes are ecologically and evolutionarily important for many reasons. Which of the following is not true of this group?

Accepted Answer

A)  Multicellular groups evolved from microbial eukaryotes. 
B)  Photosynthetic microbial eukaryotes play a major role in the energy balance of the living world. 
C)  None of the microbial eukaryotes are parasites. 
D)  Saprobic microbial eukaryotes are among the important decomposers and thus play a major role in the nutrient cycles of the living world. 
E)  Many microbial eukaryotes have highly differentiated bodies, even though they consist of only one cell. 
A)  Multicellular groups evolved from microbial eukaryotes. 
B)  Photosynthetic microbial eukaryotes play a major role in the energy balance of the living world. 
C)  None of the microbial eukaryotes are parasites. 
D)  Saprobic microbial eukaryotes are among the important decomposers and thus play a major role in the nutrient cycles of the living world. 
E)  Many microbial eukaryotes have highly differentiated bodies, even though they consist of only one cell.

Question 16

Which clade of eukaryotes includes the choano­flagellates, whose bodies resemble cells found in sea sponges?

Accepted Answer

A)  Chromalveolates 
B)  Plantae 
C)  Excavates 
D)  Rhizaria 
E)  Unikonts 
A)  Chromalveolates 
B)  Plantae 
C)  Excavates 
D)  Rhizaria 
E)  Unikonts

Question 17

Which of the following statements about the diversity of protists is false?

Accepted Answer

A)  Protists are found only in aquatic habitats. 
B)  Protists have many different metabolic lifestyles. 
C)  Protists use pseudopods or cilia to locomote. 
D)  Several groups of protists use contractile vacuoles to rid themselves of excess water. 
E)  All of the above are true; none is false. 
A)  Protists are found only in aquatic habitats. 
B)  Protists have many different metabolic lifestyles. 
C)  Protists use pseudopods or cilia to locomote. 
D)  Several groups of protists use contractile vacuoles to rid themselves of excess water. 
E)  All of the above are true; none is false.

Question 18

The red tides that can kill tons of fish are caused by toxic species of _______.

Accepted Answer

The answer of The red tides that can kill tons...

Question 19

What would be the criteria for placing a newly discovered organism within the protists?

Accepted Answer

The organism must be

Question 20

Members of which group are thought to be the closest relatives of the animals?

Accepted Answer

A)  Euglenozoans 
B)  Choanoflagellates 
C)  Stramenopiles 
D)  Alveolates 
E)  Chlorophytes 
A)  Euglenozoans 
B)  Choanoflagellates 
C)  Stramenopiles 
D)  Alveolates 
E)  Chlorophytes

Exam 27: The Origin and Diversification of Eukaryotes

Microbial eukaryotes are found in which of the following habitats?

Which of the following is not a characteristic of the brown algae?

The signal responsible for the aggregation of myxamoebas is

Which of the following statements about paramecia is false?

Which of the following modes of reproduction can be found in at least some protists?

Ciliates, as represented by Paramecium, have defensive organelles called _______ in their pellicles.

Plasmodium, the organism that causes malaria, is a member of the

Holdfasts and alginic acid are characteristic of which group of protists?

Use the following to answer questions : Refer to the diagram below. -Which letter(s) point(s) to the cyanobacterium inner membrane?

Paramecia have an elaborate sexual behavior in which they line up against each other and fuse. This is followed by an extensive reorganization and exchange of nuclear material. The entire process is called

All eukaryotes that are not plants, fungi, or animals have traditionally been called _______.

In the alternation of generations, the

The photosynthetic stramenopiles obtained their chloroplasts, which are surrounded by three membranes, through

The diatoms

Microbial eukaryotes are ecologically and evolutionarily important for many reasons. Which of the following is not true of this group?

Which clade of eukaryotes includes the choano­flagellates, whose bodies resemble cells found in sea sponges?

Which of the following statements about the diversity of protists is false?

The red tides that can kill tons of fish are caused by toxic species of _______.

What would be the criteria for placing a newly discovered organism within the protists?

Members of which group are thought to be the closest relatives of the animals?

Studying Life

Small Molecules and the Chemistry of Life

Proteins, Carbohydrates, and Lipids

Nucleic Acids and the Origin of Life

Cells: the Working Units of Life

Cell Membranes

Cell Signaling and Communication

Energy, Enzymes, and Metabolism

Pathways That Harvest Chemical Energy

Photosynthesis: Energy From Sunlight

The Cell Cycle and Cell Division

Inheritance, Genes, and Chromosomes

Dna and Its Role in Heredity

From Dna to Protein: Gene Expression

Gene Mutation and Molecular Medicine

Regulation of Gene Expression

Genomes

Recombinent Dna and Biotechnology

Differential Gene Expression in Development

Development and Evolutionary Change

Evidence and Mechanisms of Evolution

Reconstructing and Using Phylogenies

Species and Their Formation

Evolution of Genes and Genomes

The History of Life on Earth

Bacteria and Archaea: the Prokaryotic Domains

Plants Without Seeds: From Water to Land

The Evolution of Seed Plants

Fungi: Recyclers, Pathogens, Parasites, and Plant Partners

Animal Origins and the Evolution of Body Plans

Protostome Animals

Deuterostome Animals

The Plant Body

Transport in Plants

Plant Nutrition

Regulation of Plant Growth

Reproduction in Flowering Plants

Plant Responses to Environmental Challenges

Physiology, Homeostasis, and Temperature Regulation

Animal Hormones

Immunology: Animal Defense Systems

Animal Reproduction

Animal Development

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The Mammalian Nervous System: Structure and Higher Function

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Gas Exchange in Animals

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Which clade of eukaryotes includes the choanoflagellates, whose bodies resemble cells found in sea sponges?