Question 1

Premating isolation mechanisms occur when two species have different and incompatible mating behaviors.

Accepted Answer

A) True 
 B)False

Question 2

Two species of squirrels live on either side of the Grand Canyon. It is believed that a long time ago, before being separated by the canyon, they were the same species. This is an example of

Accepted Answer

A)  hybrid inviability. 
B)  behavioral isolation. 
C)  temporal isolation. 
D)  mechanical isolation. 
E)  allopatric speciation. 
A)  hybrid inviability. 
B)  behavioral isolation. 
C)  temporal isolation. 
D)  mechanical isolation. 
E)  allopatric speciation.

Question 3

Which statement best describes how overspecialization can affect a species?

Accepted Answer

A)  Highly specialized adaptations in a species increase the likelihood of extinction if the environment changes. 
B)  If the habitat around a specialized species changes, the species always evolves new specialized adaptations. 
C)  Highly specialized adaptations are rare in species that occupy a very limited geographic range. 
D)  New adaptations will never occur in a highly specialized species. 
E)  Highly specialized adaptations enable a species to live anywhere on Earth. 
A)  Highly specialized adaptations in a species increase the likelihood of extinction if the environment changes. 
B)  If the habitat around a specialized species changes, the species always evolves new specialized adaptations. 
C)  Highly specialized adaptations are rare in species that occupy a very limited geographic range. 
D)  New adaptations will never occur in a highly specialized species. 
E)  Highly specialized adaptations enable a species to live anywhere on Earth.

Question 4

The biological concept of species requires that

Accepted Answer

A)  organisms reproduce sexually. 
B)  organisms are morphologically similar. 
C)  only asexual reproduction occurs. 
D)  individuals are able to reproduce outside the group. 
E)  geographic isolation occurs. 
A)  organisms reproduce sexually. 
B)  organisms are morphologically similar. 
C)  only asexual reproduction occurs. 
D)  individuals are able to reproduce outside the group. 
E)  geographic isolation occurs.

Question 5

Hybrid inviability is an example of a(n) _________isolating mechanism.

Accepted Answer

The answer of Hybrid inviability is an example of a(n)...

Question 6

Two species of snails are physically unable to mate. This is an example of

Accepted Answer

A)  temporal isolation. 
B)  ecological isolation. 
C)  geographic isolation. 
D)  behavioral isolation 
E)  mechanical incompatibility. 
A)  temporal isolation. 
B)  ecological isolation. 
C)  geographic isolation. 
D)  behavioral isolation 
E)  mechanical incompatibility.

Question 7

Hybrid inviability occurs when two species mate and produce fertile offspring.

Accepted Answer

A) True 
 B)False

Question 8

The biological species concept is based on the idea that individuals in one group are be unable to breed with individuals outside their group. This phenomenon is referred to as_________.

Accepted Answer

reproducti

Question 9

Explain why naming and describing species based only on their appearance can be problematic.

Accepted Answer

In some cases, individuals that look the

Question 10

A plant breeder can use plum pollen to hand-fertilize an apricot flower. The fruit contains fertile seed that grows into a hybrid called a plucot. However, in the natural environment, plums and apricots bloom several weeks apart. Why are plums and apricots considered separate species?

Accepted Answer

Because the flowering occurs at two diff

Question 11

The introduction of a new species into an area that has several different habitats and very rich resources, but no predators will likely lead to

Accepted Answer

A)  adaptive radiation. 
B)  mechanical incompatibility. 
C)  extinctions. 
D)  limited speciation. 
E)  temporal isolation. 
A)  adaptive radiation. 
B)  mechanical incompatibility. 
C)  extinctions. 
D)  limited speciation. 
E)  temporal isolation.

Question 12

The biological species concept cannot be applied to

Accepted Answer

A)  allopatric populations. 
B)  extinct organisms. 
C)  species resulting from adaptive radiation. 
D)  polyploid populations. 
E)  sympatric populations. 
A)  allopatric populations. 
B)  extinct organisms. 
C)  species resulting from adaptive radiation. 
D)  polyploid populations. 
E)  sympatric populations.

Question 13

In many species of fireflies, males flash light from their abdomens to attract females. Each species has a different flashing pattern. This is an example of

Accepted Answer

A)  mechanical incompatibility. 
B)  temporal isolation. 
C)  behavioral isolation. 
D)  ecological isolation. 
E)  geographic isolation. 
A)  mechanical incompatibility. 
B)  temporal isolation. 
C)  behavioral isolation. 
D)  ecological isolation. 
E)  geographic isolation.

Question 14

The parasitic Rhagoletis flies show such a preference for either hawthorn or apple trees that they are no longer interbreeding populations. What type of speciation does this scenario illustrate?

Accepted Answer

A)  The founder effect 
B)  Specialization 
C)  Sympatric 
D)  Allopatric 
E)  Polyploidy 
A)  The founder effect 
B)  Specialization 
C)  Sympatric 
D)  Allopatric 
E)  Polyploidy

Question 15

Oceanic islands are not the only geographic habitats that can harbor isolated populations of individuals. What are some other examples of isolated ʺislandʺ populations?

Accepted Answer

Any habitat that contains a boundary tha

Question 16

Before the modern era of science, organisms were assigned to species on the basis of

Accepted Answer

A)  similarities in appearance. 
B)  their capability of interbreeding. 
C)  behavioral similarities. 
D)  the existence of fossils of earlier forms. 
E)  geographic location. 
A)  similarities in appearance. 
B)  their capability of interbreeding. 
C)  behavioral similarities. 
D)  the existence of fossils of earlier forms. 
E)  geographic location.

Question 17

A flower has four copies of each chromosome. This is an example of_________ .

Accepted Answer

The answer of A flower has four copies of each...

Question 18

How do premating isolation mechanisms differ from postmating isolation mechanisms?

Accepted Answer

Premating isolation mechanisms

Question 19

Which species is least likely to become extinct?

Accepted Answer

A)  A fish species found in all five of the Great Lakes 
B)  A fish species that has hybridized with another species to produce infertile offspring 
C)  A mammal species that feeds on a rare tropical orchid 
D)  A fish species that feeds on only rare snails found in only one small river 
E)  A mammal species that can live equally well on dry land and in fresh water 
A)  A fish species found in all five of the Great Lakes 
B)  A fish species that has hybridized with another species to produce infertile offspring 
C)  A mammal species that feeds on a rare tropical orchid 
D)  A fish species that feeds on only rare snails found in only one small river 
E)  A mammal species that can live equally well on dry land and in fresh water

Question 20

Overspecialized adaptations

Accepted Answer

A)  enable a species to be more adaptable to environmental changes. 
B)  enable a species to be more independent of other species. 
C)  are found only in species with very wide geographic ranges. 
D)  are the result of natural selection. 
E)  promote survival in a wide range of habitats. 
A)  enable a species to be more adaptable to environmental changes. 
B)  enable a species to be more independent of other species. 
C)  are found only in species with very wide geographic ranges. 
D)  are the result of natural selection. 
E)  promote survival in a wide range of habitats.

Exam 17: The Origin of Species

Premating isolation mechanisms occur when two species have different and incompatible mating behaviors.

Two species of squirrels live on either side of the Grand Canyon. It is believed that a long time ago, before being separated by the canyon, they were the same species. This is an example of

Which statement best describes how overspecialization can affect a species?

The biological concept of species requires that

Hybrid inviability is an example of a(n) _________isolating mechanism.

Two species of snails are physically unable to mate. This is an example of

Hybrid inviability occurs when two species mate and produce fertile offspring.

The biological species concept is based on the idea that individuals in one group are be unable to breed with individuals outside their group. This phenomenon is referred to as_________.

Explain why naming and describing species based only on their appearance can be problematic.

A plant breeder can use plum pollen to hand-fertilize an apricot flower. The fruit contains fertile seed that grows into a hybrid called a plucot. However, in the natural environment, plums and apricots bloom several weeks apart. Why are plums and apricots considered separate species?

The introduction of a new species into an area that has several different habitats and very rich resources, but no predators will likely lead to

The biological species concept cannot be applied to

In many species of fireflies, males flash light from their abdomens to attract females. Each species has a different flashing pattern. This is an example of

The parasitic Rhagoletis flies show such a preference for either hawthorn or apple trees that they are no longer interbreeding populations. What type of speciation does this scenario illustrate?

Oceanic islands are not the only geographic habitats that can harbor isolated populations of individuals. What are some other examples of isolated ʺislandʺ populations?

Before the modern era of science, organisms were assigned to species on the basis of

A flower has four copies of each chromosome. This is an example of_________ .

How do premating isolation mechanisms differ from postmating isolation mechanisms?

Which species is least likely to become extinct?

Overspecialized adaptations

An Introduction to Life on Earth

Atoms, Molecules, and Life

Biological Molecules

Cell Structure and Function

Cell Membrane Structure and Function

Energy Flow in the Life of a Cell

Capturing Solar Energy: Photosynthesis

Harvesting Energy: Glycolysis and Cellular Respiration

Cellular Reproduction

Meiosis: the Basis of Sexual Reproduction

Patterns of Inheritance

DNA: The Molecule of Heredity

Gene Expression and Regulation

Biotechnology

Principles of Evolution

How Populations Evolve

The History of Life

Systematics: Seeking Order Amid Diversity

The Diversity of Prokaryotes and Viruses

The Diversity of Protists

The Diversity of Plants

The Diversity of Fungi

Animal Diversity I: Invertebrates

Animal Diversity Ii: Vertebrates

Animal Behavior

Population Growth and Regulation

Community Interactions

Energy Flow and Nutrient Cycling in Ecosystems

Earths Diverse Ecosystems

Conserving Earths Biodiversity

Homeostasis and the Organization of the Animal Body

Circulation

Respiration

Nutrition and Digestion

The Urinary System

Defenses Against Disease

Chemical Control of the Animal Body: the Endocrine System

The Nervous System

The Senses

Action and Support: the Muscles and Skeleton

Animal Reproduction

Animal Development

Plant Anatomy and Nutrient Transport

Plant Reproduction and Development

Plant Responses to the Environment

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