Question 1

In alternation of generations,the gametophyte generation is _______ and produces _______.

Accepted Answer

A)  haploid;spores 
B)  diploid;gametes 
C)  diploid;spores 
D)  haploid;gametes 
E)  haploid or diploid;spores 
A)  haploid;spores 
B)  diploid;gametes 
C)  diploid;spores 
D)  haploid;gametes 
E)  haploid or diploid;spores

Question 2

While out hiking you drink water from a stream,and several days later you feel sick with diarrhea and intestinal bloating.Your doctor collects a stool sample and finds unicellular organisms that lack mitochondria and have multiple flagella.You are most likely infected with

Accepted Answer

A)  the diplomonad Giardia. 
B)  slime molds. 
C)  kinetoplastid trypanosomes. 
D)  the ciliate Paramecium. 
E)  testate amoebozoans. 
A)  the diplomonad Giardia. 
B)  slime molds. 
C)  kinetoplastid trypanosomes. 
D)  the ciliate Paramecium. 
E)  testate amoebozoans.

Question 3

The increasing concentration of oxygen in Earth's early atmosphere

Accepted Answer

A)  was favorable to numerous prokaryotes because of their flexible membranes. 
B)  was fatal to numerous eukaryotes because of their mitochondria. 
C)  conferred a selective advantage on eukaryotes that possessed mitochondria. 
D)  conferred a selective advantage on eukaryotes that possessed chloroplasts. 
E)  conferred a selective advantage on prokaryotes because of their stiff membranes. 
A)  was favorable to numerous prokaryotes because of their flexible membranes. 
B)  was fatal to numerous eukaryotes because of their mitochondria. 
C)  conferred a selective advantage on eukaryotes that possessed mitochondria. 
D)  conferred a selective advantage on eukaryotes that possessed chloroplasts. 
E)  conferred a selective advantage on prokaryotes because of their stiff membranes.

Question 4

A eukaryotic organism that undergoes alternation of generations in which different generations do not resemble each other morphologically is referred to as

Accepted Answer

A)  homomorphic. 
B)  heteromorphic. 
C)  isomorphic. 
D)  anisomorphic. 
E)  gametophytic. 
A)  homomorphic. 
B)  heteromorphic. 
C)  isomorphic. 
D)  anisomorphic. 
E)  gametophytic.

Question 5

You find a fish carcass in a pond and see white filaments radiating from it.Back in the lab,you stain the white filaments and see that they have cell walls made of cellulose.You have most likely found a species what would be classified within the

Accepted Answer

A)  rhizaria. 
B)  apicomplexans. 
C)  red algae. 
D)  euglenids. 
E)  oomycetes. 
A)  rhizaria. 
B)  apicomplexans. 
C)  red algae. 
D)  euglenids. 
E)  oomycetes.

Question 6

Which group uses pseudopods for locomotion?

Accepted Answer

A)  Euglenids 
B)  Diatoms 
C)  Amoebozoans 
D)  Dinoflagellates 
E)  Stramenopiles 
A)  Euglenids 
B)  Diatoms 
C)  Amoebozoans 
D)  Dinoflagellates 
E)  Stramenopiles

Question 7

Which pair does not share the same relationship as alveolates and dinoflagellates?

Accepted Answer

A)  Stramenopiles and diatoms 
B)  Rhizarians and radiolarians 
C)  Excavates and diplomonads 
D)  Amoebozoans and loboseans 
E)  Apicomplexans and ciliates 
A)  Stramenopiles and diatoms 
B)  Rhizarians and radiolarians 
C)  Excavates and diplomonads 
D)  Amoebozoans and loboseans 
E)  Apicomplexans and ciliates

Question 8

The many organisms designated as "protists" or "microbial eukaryotes"

Accepted Answer

A)  are closely related to the bacteria. 
B)  are highly diverse and not necessarily closely related to one another. 
C)  form a monophyletic clade. 
D)  are all unicellular. 
E)  are all microscopic. 
A)  are closely related to the bacteria. 
B)  are highly diverse and not necessarily closely related to one another. 
C)  form a monophyletic clade. 
D)  are all unicellular. 
E)  are all microscopic.

Question 9

In terms of their nutritional mode,microbial eukaryotes can be

Accepted Answer

A)  autotrophs. 
B)  absorptive heterotrophs. 
C)  photosynthetic. 
D)  both heterotrophic and autotrophic 
E)  All of the above 
A)  autotrophs. 
B)  absorptive heterotrophs. 
C)  photosynthetic. 
D)  both heterotrophic and autotrophic 
E)  All of the above

Question 10

The microbial eukaryotes that are responsible for sleeping sickness and those that are responsible for malaria

Accepted Answer

A)  are both alveolates. 
B)  both have gametocyte life stages. 
C)  cause the same symptoms. 
D)  both have insect vectors for transmission to humans. 
E)  are both trypanosomes 
A)  are both alveolates. 
B)  both have gametocyte life stages. 
C)  cause the same symptoms. 
D)  both have insect vectors for transmission to humans. 
E)  are both trypanosomes

Question 11

The _______ are a group of protists that harbor photosynthetic and accessory pigments that make them look golden brown in color.

Accepted Answer

A)  dinoflagellates 
B)  plasmodial slime molds 
C)  radiolarians 
D)  oomycetes 
E)  corals 
A)  dinoflagellates 
B)  plasmodial slime molds 
C)  radiolarians 
D)  oomycetes 
E)  corals

Question 12

Foraminiferan fossils

Accepted Answer

A)  are used as "Earth-friendly" insecticide. 
B)  can be used to classify and date sedimentary rocks. 
C)  are only found under today's oceans. 
D)  created supplies of fossil fuels. 
E)  Both b and c 
A)  are used as "Earth-friendly" insecticide. 
B)  can be used to classify and date sedimentary rocks. 
C)  are only found under today's oceans. 
D)  created supplies of fossil fuels. 
E)  Both b and c

Question 13

Which group of protists secretes an external "shell" of silica (silicon dioxide)?

Accepted Answer

A)  Diatoms 
B)  Paramecium 
C)  Red algae 
D)  Euglenids 
E)  Amoebozoans 
A)  Diatoms 
B)  Paramecium 
C)  Red algae 
D)  Euglenids 
E)  Amoebozoans

Question 14

Which group does not include human parasites?

Accepted Answer

A)  Apicomplexans 
B)  Kinetoplastids 
C)  Heteroloboseans 
D)  Diplomonads 
E)  Oomycetes 
A)  Apicomplexans 
B)  Kinetoplastids 
C)  Heteroloboseans 
D)  Diplomonads 
E)  Oomycetes

Question 15

The excavates are a clade of eukaryotes that includes groups without mitochondria.What is the most convincing evidence that this absence of mitochondria is a derived condition resulting from a secondary loss?

Accepted Answer

A)  There is a nuclear membrane in these organisms. 
B)  The cell membrane of these organisms is flexible and capable of phagocytosis. 
C)  Some of the nuclear genes of these organisms are normally associated with mitochondria. 
D)  In euglenids,a group in this clade with mitochondria,the mitochondria have distinctive disc-shaped cristae. 
E)  Other eukaryote clades have both chloroplasts and mitochondria. 
A)  There is a nuclear membrane in these organisms. 
B)  The cell membrane of these organisms is flexible and capable of phagocytosis. 
C)  Some of the nuclear genes of these organisms are normally associated with mitochondria. 
D)  In euglenids,a group in this clade with mitochondria,the mitochondria have distinctive disc-shaped cristae. 
E)  Other eukaryote clades have both chloroplasts and mitochondria.

Question 16

Which feature is not a characteristic of the plasmodium of a plasmodial slime mold?

Accepted Answer

A)  Many nuclei enclosed in a single cell membrane (coenocyte) 
B)  Haploid nuclei 
C)  Cytoplasmic streaming 
D)  Mitosis without cytokinesis 
E)  Formation of a sclerotium when conditions are unfavorable 
A)  Many nuclei enclosed in a single cell membrane (coenocyte) 
B)  Haploid nuclei 
C)  Cytoplasmic streaming 
D)  Mitosis without cytokinesis 
E)  Formation of a sclerotium when conditions are unfavorable

Question 17

In the cellular slime molds,the onset of adverse conditions causes

Accepted Answer

A)  aggregation of swarm cells to form a plasmodium. 
B)  formation of sporangia. 
C)  release of myxamoebas from fruiting bodies. 
D)  the onset of cytoplasmic streaming. 
E)  aggregation of myxamoebas to form a slug or pseudoplasmodium. 
A)  aggregation of swarm cells to form a plasmodium. 
B)  formation of sporangia. 
C)  release of myxamoebas from fruiting bodies. 
D)  the onset of cytoplasmic streaming. 
E)  aggregation of myxamoebas to form a slug or pseudoplasmodium.

Question 18

Foraminiferans secrete an external shell made of _______,whereas diatoms have a shell made of _______.

Accepted Answer

A)  grains of sand;silica 
B)  chitin;grains of sand 
C)  calcium carbonate;silica 
D)  grains of sand;glass 
E)  silica;calcium carbonate 
A)  grains of sand;silica 
B)  chitin;grains of sand 
C)  calcium carbonate;silica 
D)  grains of sand;glass 
E)  silica;calcium carbonate

Question 19

The signal that is responsible for the aggregation of myxamoebas is

Accepted Answer

A)  the onset of adverse conditions. 
B)  alginic acid. 
C)  phycoerythrin. 
D)  actin. 
E)  endosymbiosis. 
A)  the onset of adverse conditions. 
B)  alginic acid. 
C)  phycoerythrin. 
D)  actin. 
E)  endosymbiosis.

Question 20

The chloroplasts of red algae retain certain pigments of the original cyanobacterial endosymbiont that are absent in green algal chloroplasts.The evolutionary significance of this is that

Accepted Answer

A)  red algae cannot photosynthesize,leading to heterotrophy. 
B)  neither green algae nor red algae can be classified as protists. 
C)  chloroplasts likely originated as free-living cyanobacteria. 
D)  red algae are classified as cyanobacteria. 
E)  red algae are classified as prokaryotes. 
A)  red algae cannot photosynthesize,leading to heterotrophy. 
B)  neither green algae nor red algae can be classified as protists. 
C)  chloroplasts likely originated as free-living cyanobacteria. 
D)  red algae are classified as cyanobacteria. 
E)  red algae are classified as prokaryotes.

Exam 20: The Origin and Diversification of Eukaryotes

In alternation of generations,the gametophyte generation is _______ and produces _______.

While out hiking you drink water from a stream,and several days later you feel sick with diarrhea and intestinal bloating.Your doctor collects a stool sample and finds unicellular organisms that lack mitochondria and have multiple flagella.You are most likely infected with

The increasing concentration of oxygen in Earth's early atmosphere

A eukaryotic organism that undergoes alternation of generations in which different generations do not resemble each other morphologically is referred to as

You find a fish carcass in a pond and see white filaments radiating from it.Back in the lab,you stain the white filaments and see that they have cell walls made of cellulose.You have most likely found a species what would be classified within the

Which group uses pseudopods for locomotion?

Which pair does not share the same relationship as alveolates and dinoflagellates?

The many organisms designated as "protists" or "microbial eukaryotes"

In terms of their nutritional mode,microbial eukaryotes can be

The microbial eukaryotes that are responsible for sleeping sickness and those that are responsible for malaria

The _______ are a group of protists that harbor photosynthetic and accessory pigments that make them look golden brown in color.

Foraminiferan fossils

Which group of protists secretes an external "shell" of silica (silicon dioxide)?

Which group does not include human parasites?

The excavates are a clade of eukaryotes that includes groups without mitochondria.What is the most convincing evidence that this absence of mitochondria is a derived condition resulting from a secondary loss?

Which feature is not a characteristic of the plasmodium of a plasmodial slime mold?

In the cellular slime molds,the onset of adverse conditions causes

Foraminiferans secrete an external shell made of _______,whereas diatoms have a shell made of _______.

The signal that is responsible for the aggregation of myxamoebas is

The chloroplasts of red algae retain certain pigments of the original cyanobacterial endosymbiont that are absent in green algal chloroplasts.The evolutionary significance of this is that

Introduction

The Chemistry and Energy of Life

Nucleic Acids, Proteins, and Enzymes

Cells: the Working Units of Life

Cell Membranes and Signaling

Pathways That Harvest and Store Chemical Energy

The Cell Cycle and Cell Division

Inheritance, Genes, and Chromosomes

DNA and Its Role in Heredity

From Dna to Protein: Gene Expression

Regulation of Gene Expression

Genomes

Biotechnology

Genes, Development, and Evolution

Processes of Evolution

Reconstructing and Using Phylogenies

Speciation

The History of Life on Earth

Bacteria, Archaea, and Viruses

The Evolution of Plants

The Evolution and Diversity of Fungi

Animal Origins and Diversity

The Plant Body

Plant Nutrition and Transport

Plant Growth and Development

Reproduction of Flowering Plants

Plants in the Environment

Fundamentals of Animal Function

Nutrition and Digestion

Breathing

Circulation

Muscle and Movement

Neurons, Sense Organs, and Nervous Systems

Nervous and Endocrine Control

Water and Salts: Excretion

Animal Reproduction

Animal Development

Immunology: Animal Defense Systems

Animal Behavior

The Distribution of Earths Ecological Systems

Populations

Ecological and Evolutionary Consequences of Interactions Within and Among Species

Ecological Communities

The Global Ecosystem

Filters

In alternation of generations,the gametophyte generation is _ and produces _.

Foraminiferans secrete an external shell made of _,whereas diatoms have a shell made of _.