Question 1

Due to character displacement,two closely related species may differ most morphologically when they

Accepted Answer

A) are allopatric. 
B) are sympatric. 
C) occupy the same niche. 
D) occupy different niches. 
E) share a common ancestor. 
A) are allopatric. 
B) are sympatric. 
C) occupy the same niche. 
D) occupy different niches. 
E) share a common ancestor. B

Question 2

Recurrent isolation promotes _______.

Accepted Answer

speciation

Question 3

The biological species concept of Ernst Mayr can be applied to all of the following except

Accepted Answer

A) sympatric organisms. 
B) allopatric organisms. 
C) eukaryotic organisms. 
D) prokaryotic organisms. 
E) fossil organisms. 
A) sympatric organisms. 
B) allopatric organisms. 
C) eukaryotic organisms. 
D) prokaryotic organisms. 
E) fossil organisms. E

Question 4

If two species are able to mate and produce an offspring which can mate with itself,but which is unable to mate with its parent's species then this can best be described as an example of

Accepted Answer

A) allopatric speciation. 
B) sympatric speciation via disruptive selection. 
C) sympatric speciation via polyploidy. 
D) a species cluster. 
E) character displacement. 
A) allopatric speciation. 
B) sympatric speciation via disruptive selection. 
C) sympatric speciation via polyploidy. 
D) a species cluster. 
E) character displacement.

Question 5

The type of speciation that geographically isolates populations and results in the divergence of distinct species is called ____________ speciation.

Accepted Answer

A) gradual 
B) sympatric 
C) allopatric 
D) sexual 
E) adaptive 
A) gradual 
B) sympatric 
C) allopatric 
D) sexual 
E) adaptive

Question 6

Very rapid speciation occurred when cichlid fishes were isolated in Lake Victoria.Widespread extinction was dramatically seen when

Accepted Answer

A) artificial selection stopped. 
B) predatory fish were added. 
C) hybridization stopped. 
D) fishing was prohibiteD. 
E) insect larvae stocks were depleted. 
A) artificial selection stopped. 
B) predatory fish were added. 
C) hybridization stopped. 
D) fishing was prohibiteD. 
E) insect larvae stocks were depleted.

Question 7

The biological species concept of Ernst Mayr can be applied to all of the following except

Accepted Answer

A) sympatric organisms. 
B) allopatric organisms. 
C) eukaryotic organisms. 
D) prokaryotic organisms. 
E) asexually-reproducing organisms. 
A) sympatric organisms. 
B) allopatric organisms. 
C) eukaryotic organisms. 
D) prokaryotic organisms. 
E) asexually-reproducing organisms.

Question 8

One of the main isolating mechanisms among hundreds of species of Drosophila in Hawaii appears to be

Accepted Answer

A) behavioral. 
B) temporal. 
C) geographical. 
D) mechanical. 
E) none of the choices. 
A) behavioral. 
B) temporal. 
C) geographical. 
D) mechanical. 
E) none of the choices.

Question 9

Two populations that inhabit the same area but remain genetically distinct can best be called

Accepted Answer

A) species. 
B) subspecies (races). 
C) polymorphiC. 
D) allopatric species. 
E) sympatric species. 
A) species. 
B) subspecies (races). 
C) polymorphiC. 
D) allopatric species. 
E) sympatric species.

Question 10

Which one of the following could not apply to a postzygotic isolating mechanism?

Accepted Answer

A) Hybrids are sterile. 
B) Hybrids develop abnormally. 
C) Hybrids fail to become established in nature. 
D) Hybrids are selected against. 
E) Hybrids cannot be formed. 
A) Hybrids are sterile. 
B) Hybrids develop abnormally. 
C) Hybrids fail to become established in nature. 
D) Hybrids are selected against. 
E) Hybrids cannot be formed.

Question 11

The distinctive role of a species in nature is its

Accepted Answer

A) fitness. 
B) adaptation. 
C) habitat. 
D) niche. 
E) life cyclE. 
A) fitness. 
B) adaptation. 
C) habitat. 
D) niche. 
E) life cyclE.

Question 12

Which one of the following statements about mass extinctions is false?

Accepted Answer

A) The five major mass extinctions were all followed by a rebound in species diversity. 
B) By definition,in mass extinctions all major groups are affected equally. 
C) Major changes in the direction of evolution have often occurred after mass extinctions. 
D) The five major mass extinctions were caused mainly by geological events and,perhaps,collision with asteroids. 
E) Rebound from the current,sixth mass extinction may be slower than in previous mass extinctions. 
A) The five major mass extinctions were all followed by a rebound in species diversity. 
B) By definition,in mass extinctions all major groups are affected equally. 
C) Major changes in the direction of evolution have often occurred after mass extinctions. 
D) The five major mass extinctions were caused mainly by geological events and,perhaps,collision with asteroids. 
E) Rebound from the current,sixth mass extinction may be slower than in previous mass extinctions.

Question 13

Many species might coexist in a particular environment by occupying different areas called

Accepted Answer

A) biomes. 
B) habitats. 
C) territories. 
D) domains. 
E) ranges. 
A) biomes. 
B) habitats. 
C) territories. 
D) domains. 
E) ranges.

Question 14

All of the following describe members of a species except

Accepted Answer

A) they have several isolated gene pools. 
B) they differ from other species in one or more characteristics. 
C) they cannot hybridize freely with other species members. 
D) they can interbreed freely with all other members. 
E) for potential gene flow with all other members. 
A) they have several isolated gene pools. 
B) they differ from other species in one or more characteristics. 
C) they cannot hybridize freely with other species members. 
D) they can interbreed freely with all other members. 
E) for potential gene flow with all other members.

Question 15

The production of new species through hybridization is especially important in

Accepted Answer

A) finches. 
B) fruit flies. 
C) humans. 
D) plants. 
E) mules. 
A) finches. 
B) fruit flies. 
C) humans. 
D) plants. 
E) mules.

Question 16

Which one of the following statements about the diversity of Darwin's finches on the Galápagos Islands is false?

Accepted Answer

A) All of the finches share a common ancestor that colonized the islands. 
B) Prior to the adaptive radiation of finches,there were many unoccupied habitats in the Galápagos Islands. 
C) The many islands in the Galápagos archipelago favored allopatric speciation. 
D) The adaptive radiation of Darwin's finches resulted from a key evolutionary innovation. 
E) There are several species clusters of finches. 
A) All of the finches share a common ancestor that colonized the islands. 
B) Prior to the adaptive radiation of finches,there were many unoccupied habitats in the Galápagos Islands. 
C) The many islands in the Galápagos archipelago favored allopatric speciation. 
D) The adaptive radiation of Darwin's finches resulted from a key evolutionary innovation. 
E) There are several species clusters of finches.

Question 17

Once species have formed,they keep their identity by

Accepted Answer

A) developmental differences. 
B) genetic blocks. 
C) isolating mechanisms. 
D) somatic mutations. 
E) structural modifications. 
A) developmental differences. 
B) genetic blocks. 
C) isolating mechanisms. 
D) somatic mutations. 
E) structural modifications.

Question 18

Sympatric speciation can involve all of the following except

Accepted Answer

A) disruptive selection. 
B) reproductive isolating mechanisms. 
C) autopolyploidy. 
D) two or more populations separated by a geographic barrier. 
E) allopolyploidy. 
A) disruptive selection. 
B) reproductive isolating mechanisms. 
C) autopolyploidy. 
D) two or more populations separated by a geographic barrier. 
E) allopolyploidy.

Question 19

Which of the following choices correctly presents only prezygotic isolating mechanisms?

Accepted Answer

A) geographical isolation,ecological isolation,behavioral isolation,and hybrid sterility 
B) temporal isolation,mechanical isolation,hybrid adults die before mating,geographical isolation 
C) ecological isolation,geographical isolation,mechanical isolation,hybrid sterility 
D) geographical isolation,temporal isolation,behavioral isolation,mechanical isolation 
A) geographical isolation,ecological isolation,behavioral isolation,and hybrid sterility 
B) temporal isolation,mechanical isolation,hybrid adults die before mating,geographical isolation 
C) ecological isolation,geographical isolation,mechanical isolation,hybrid sterility 
D) geographical isolation,temporal isolation,behavioral isolation,mechanical isolation

Question 20

A _______ is a group of organisms that differs in one or more characteristics from other groups,and does not hybridize or intermate extensively if they occur together in nature.

Accepted Answer

The answer of A _______ is a group of organisms...

Exam 22: The Origin of Species

Due to character displacement,two closely related species may differ most morphologically when they

Recurrent isolation promotes _______.

The biological species concept of Ernst Mayr can be applied to all of the following except

If two species are able to mate and produce an offspring which can mate with itself,but which is unable to mate with its parent's species then this can best be described as an example of

The type of speciation that geographically isolates populations and results in the divergence of distinct species is called ____________ speciation.

Very rapid speciation occurred when cichlid fishes were isolated in Lake Victoria.Widespread extinction was dramatically seen when

The biological species concept of Ernst Mayr can be applied to all of the following except

One of the main isolating mechanisms among hundreds of species of Drosophila in Hawaii appears to be

Two populations that inhabit the same area but remain genetically distinct can best be called

Which one of the following could not apply to a postzygotic isolating mechanism?

The distinctive role of a species in nature is its

Which one of the following statements about mass extinctions is false?

Many species might coexist in a particular environment by occupying different areas called

All of the following describe members of a species except

The production of new species through hybridization is especially important in

Which one of the following statements about the diversity of Darwin's finches on the Galápagos Islands is false?

Once species have formed,they keep their identity by

Sympatric speciation can involve all of the following except

Which of the following choices correctly presents only prezygotic isolating mechanisms?

A _______ is a group of organisms that differs in one or more characteristics from other groups,and does not hybridize or intermate extensively if they occur together in nature.

The Science of Biology

The Nature of Molecules

The Chemical Building Blocks of Life

Cell Structure

Membranes

Energy and Metabolism

How Cells Harvest Energy

Photosynthesis

Cell Communication

How Cells Divide

Sexual Reproduction and Meiosis

Patterns of Inheritance

Chromosomes Mapping and the Meiosis - Inheritance Connection

Dna: the Genetic Material

Genes and How They Work

Control of Gene Expression

Biotechnology

Genomics

Cellular Mechanisms of Development

Genes Within Populations

The Evidence for Evolution

Systematics and the Phylogenetic Revolution

Genome Evolution

Evolution of Development

The Tree of Life

Viruses

Prokaryotes

Protists

Overview of Green Plants

Fungi

Overview of Animal Diversity

Noncoelomate Invertebrates

Coelomate Invertebrates

Vertebrates

Plant Form

Vegetative Plant Development

Transport in Plants

Plant Nutrition and Soils

Plant Defense Responses

Sensory Systems in Plants

Plant Reproduction

The Animal Body and Principles of Regulation

The Nervous System

Sensory Systems

The Endocrine System

The Musculoskeletal System

The Digestive System

The Respiratory System

The Circulatory System

Osmotic Regulation and the Urinary System

The Immune System

The Reproductive System

Animal Development

Behavioral Biology

Population Ecology

Community of Ecology

Dynamics of Ecosystems

The Biosphere

Conservation Biology