Question 1

Our current understanding of the evolutionary relationship among the five major groups of protists is

Accepted Answer

A)  uncertain,or at most weakly supported. 
B)  strongly supported by morphological data. 
C)  strongly supported by genomic data. 
D)  somewhat supported by fossil data. 
E)  impossible to determine. 
A)  uncertain,or at most weakly supported. 
B)  strongly supported by morphological data. 
C)  strongly supported by genomic data. 
D)  somewhat supported by fossil data. 
E)  impossible to determine.

Question 2

The overall size that unicellular microbial eukaryotes can achieve is limited by their

Accepted Answer

A)  energy-producing potential. 
B)  metabolism. 
C)  mitochondria. 
D)  surface area-to-volume ratio. 
E)  chloroplasts. 
A)  energy-producing potential. 
B)  metabolism. 
C)  mitochondria. 
D)  surface area-to-volume ratio. 
E)  chloroplasts.

Question 3

Which organisms lack mitochondria?

Accepted Answer

A)  Diplomonads 
B)  Choanoflagellates 
C)  Red algae 
D)  Euglenozoans 
E)  Plasmodial slime molds 
A)  Diplomonads 
B)  Choanoflagellates 
C)  Red algae 
D)  Euglenozoans 
E)  Plasmodial slime molds

Question 4

Which process is not part of conjugation in Paramecium?

Accepted Answer

A)  Meiosis 
B)  Mitosis 
C)  Cytokinesis 
D)  Fusion of haploid nuclei 
E)  Breakdown of some micronuclei 
A)  Meiosis 
B)  Mitosis 
C)  Cytokinesis 
D)  Fusion of haploid nuclei 
E)  Breakdown of some micronuclei

Question 5

Microbial eukaryotes are found in which habitat(s)?

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 6

The ancestor of photosynthetic euglenids took up the chloroplast of a green alga.This explains why photosynthetic euglenids

Accepted Answer

A)  have a flagellum. 
B)  have the same photosynthetic pigments as plants. 
C)  are ancestral to land plants. 
D)  have two nuclei. 
E)  lose their photosynthetic pigments when kept in the dark. 
A)  have a flagellum. 
B)  have the same photosynthetic pigments as plants. 
C)  are ancestral to land plants. 
D)  have two nuclei. 
E)  lose their photosynthetic pigments when kept in the dark.

Question 7

Which group is not considered to belong among the protists?

Accepted Answer

A)  Diatoms 
B)  Red algae 
C)  Slime molds 
D)  Sponges 
E)  Giant kelp 
A)  Diatoms 
B)  Red algae 
C)  Slime molds 
D)  Sponges 
E)  Giant kelp

Question 8

Which step was essential in the evolution of eukaryotic cells?

Accepted Answer

A)  The development of a nuclear envelope 
B)  The development of a cytoskeleton 
C)  The endosymbiotic acquisition of certain organelles 
D)  The development of a flexible cell surface 
E)  All of the above 
A)  The development of a nuclear envelope 
B)  The development of a cytoskeleton 
C)  The endosymbiotic acquisition of certain organelles 
D)  The development of a flexible cell surface 
E)  All of the above

Question 9

Which group contains giant kelps and other multicellular brown algae?

Accepted Answer

A)  Apicomplexans 
B)  Fungi 
C)  Stramenopiles 
D)  Alveolates 
E)  Euglenids 
A)  Apicomplexans 
B)  Fungi 
C)  Stramenopiles 
D)  Alveolates 
E)  Euglenids

Question 10

If you were to examine limestone deposits throughout the world,which group of organisms would you expect to find in the greatest abundance in these deposits?

Accepted Answer

A)  Foraminiferans 
B)  Dinoflagellates 
C)  Radiolarians 
D)  Heliozoans 
E)  Trypanosomes 
A)  Foraminiferans 
B)  Dinoflagellates 
C)  Radiolarians 
D)  Heliozoans 
E)  Trypanosomes

Question 11

The _______ clade includes the choanoflagellates,animals,and fungi.

Accepted Answer

The answer of The _______ clade includes the choanoflagellates,animals,and fungi....

Question 12

The clusters of blind-ending,grapelike,hollow structures in the mammalian lung are called "alveoli." Similarly,members of the clade called alveolates typically

Accepted Answer

A)  have two unequal flagella,one with hairs. 
B)  possess long,thin pseudopods. 
C)  have lobe-shaped pseudopods. 
D)  possess sacs just beneath their cell membranes. 
E)  lack mitochondria. 
A)  have two unequal flagella,one with hairs. 
B)  possess long,thin pseudopods. 
C)  have lobe-shaped pseudopods. 
D)  possess sacs just beneath their cell membranes. 
E)  lack mitochondria.

Question 13

Which statement about eukaryotic phytoplankton is false?

Accepted Answer

A)  They constitute a clade. 
B)  Some contributed to the formation of petroleum. 
C)  Some play an important role in coral bleaching. 
D)  Some are food for marine animals. 
E)  Some are important primary producers. 
A)  They constitute a clade. 
B)  Some contributed to the formation of petroleum. 
C)  Some play an important role in coral bleaching. 
D)  Some are food for marine animals. 
E)  Some are important primary producers.

Question 14

Asexually reproduced groups of nearly identical organisms are known as

Accepted Answer

A)  fruiting bodies. 
B)  buds. 
C)  clonal lineages. 
D)  myxamoebas. 
E)  conjugates. 
A)  fruiting bodies. 
B)  buds. 
C)  clonal lineages. 
D)  myxamoebas. 
E)  conjugates.

Question 15

Which statement about the brown algae is false?

Accepted Answer

A)  They are all multicellular. 
B)  They use the same photosynthetic pigments as land plants. 
C)  They are almost exclusively marine. 
D)  A few are many meters in length. 
E)  They are stramenopiles. 
A)  They are all multicellular. 
B)  They use the same photosynthetic pigments as land plants. 
C)  They are almost exclusively marine. 
D)  A few are many meters in length. 
E)  They are stramenopiles.

Question 16

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 20: The Origin and Diversification of Eukaryotes

Our current understanding of the evolutionary relationship among the five major groups of protists is

The overall size that unicellular microbial eukaryotes can achieve is limited by their

Which organisms lack mitochondria?

Which process is not part of conjugation in Paramecium?

Microbial eukaryotes are found in which habitat(s)?

The ancestor of photosynthetic euglenids took up the chloroplast of a green alga.This explains why photosynthetic euglenids

Which group is not considered to belong among the protists?

Which step was essential in the evolution of eukaryotic cells?

Which group contains giant kelps and other multicellular brown algae?

If you were to examine limestone deposits throughout the world,which group of organisms would you expect to find in the greatest abundance in these deposits?

The _______ clade includes the choanoflagellates,animals,and fungi.

The clusters of blind-ending,grapelike,hollow structures in the mammalian lung are called "alveoli." Similarly,members of the clade called alveolates typically

Which statement about eukaryotic phytoplankton is false?

Asexually reproduced groups of nearly identical organisms are known as

Which statement about the brown algae is false?

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

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