Question 1

A large population of animals is split in two by a physical barrier.Over time,the genetic makeup of the two resulting populations becomes more and more different until each population becomes a separate species.This is an example of

Accepted Answer

A)   sympatric speciation.
B)   allopatric speciation.
C)   genetic drift.
D)   natural selection.E) B) and C)
F) B) and D)

Question 2

How does coevolution lead to speciation?

Accepted Answer

A)   Coevolution is the mechanism that allows allopatric speciation to occur.
B)   Coevolution causes the extinction of species that have limited genetic diversity.
C)   The adaptations that occur during coevolution are passed on to other species.
D)   An adaptation in one organism drives adaptation in a second organism.E) A) and B)
F) A) and C)

Question 3

Individual organisms with inherited characteristics that enable them to survive and reproduce are said to have greater ________ fitness than individuals who fail to survive and reproduce.

Accepted Answer

reproducti...

Question 4

Which of the following statements is true about adaptation?

Accepted Answer

A)   It is large-scale movement of a single species over a new geographic area.
B)   It occurs when a more adapted species causes the extinction of a less adapted one.
C)   It is the process by which natural selection improves the match between an organism and its environment over time.
D)   It is an increase in the adaptiveness of many species that have already evolved.E) A) and D)
F) B) and C)

Question 5

Identify whether a type of reproductive barrier is prezygotic or postzygotic.
-gametic isolation

Accepted Answer

A)  prezygotic
B)  postzygoticC) A) and B)
D) undefined

Question 6

Which of the following is one of the three important characteristics of an adaptation?

Accepted Answer

A)   An adaptation must be a physical change.
B)   Adaptations are typically simple behavioral changes.
C)   An adaptation improves an organism's survival in its environment.
D)   An adaptation must result in a perfect match between an organism and its environment.E) None of the above
F) All of the above

Question 7

A microbiologist discovers a Streptococcus bacterium living on a human scalp.She wants to know whether the bacterium she found is the same species as a Streptococcus bacterium she isolated from the throat of the same human.Explain how she could determine whether these bacteria are the same species.

Accepted Answer

The biological species definition will n...

Question 8

Which of the following examples does NOT illustrate a difference in fitness that would lead to evolution by natural selection?

Accepted Answer

A)   Male peacocks with larger, more colorful tails are more frequently chosen as mates.
B)   Moths with coloration that allows them to blend in with the bark of spruce trees are more difficult for predators to find.
C)   Wolves who are more successful hunting in packs find mates more frequently.
D)   A female panda living in a zoo in China is impregnated more frequently than a female panda living in a zoo in the United States.E) A) and C)
F) B) and C)

Question 9

The rough-skinned newt produces one of the most potent toxins on the planet.Scientists in Oregon have found that as newts evolve to produce a more deadly toxin,their primary predator,the garter snake,evolves ways to resist the toxin.This is an example of

Accepted Answer

A)   ecological trade-offs in the evolution of the newt.
B)   an adaptation of the newt to living in aquatic environments.
C)   reproductive isolation in a population of garter snakes.
D)   coevolution of predator and prey.E) A) and D)
F) None of the above

Question 10

Two populations of lizards live in the same area.Which of the following evidence would convince you that they are two distinct species?

Accepted Answer

A)   Individuals in one population display a different color pattern than individuals in the second population.
B)   Individuals in one population are noticeably larger than individuals in the second population.
C)   The two populations are not capable of interbreeding and producing fertile offspring.
D)   The two populations are capable of interbreeding and producing fertile hybrid offspring.E) C) and D)
F) A) and D)

Question 11

The fossils of two adult birds are found in a nest containing several fossilized eggs.Physically,the bird fossils look very different.Scientists are most likely to classify these species using

Accepted Answer

A)   the biological species concept.
B)   DNA from the fossils.
C)   morphology of the fossils.
D)   evidence of reproduction.E) C) and D)
F) A) and C)

Question 12

Two biologists discover two populations of toads living in the same area.Morphologically,these two populations are different.The toads in one population have much wider heads and darker coloration than the second population.One of the biologists suggests names for the two new species.The second biologist questions whether the two populations are separate species.Why is the second biologist hesitant to declare these populations are two species?

Accepted Answer

The second biologist would pro...

Question 13

Populations within a species are connected by

Accepted Answer

A)   gene flow.
B)   speciation.
C)   continental drift.
D)   genetic drift.E) All of the above
F) None of the above

Question 14

Within a population of mice there is an allele for a gene that leads to the production of larger front teeth.In areas where seeds have thicker coatings,larger teeth allow these mice to chew through thicker seed coatings and survive at a higher rate than mice with smaller teeth.Would you expect an increase in the percentage of mice with larger teeth in a population of mice living in an area with seeds that have thicker coatings? Explain your reasoning.

Accepted Answer

In an area with seeds that have a thicke...

Question 15

Identify whether a type of reproductive barrier is prezygotic or postzygotic.
-hybrid sterility

Accepted Answer

A)  prezygotic
B)  postzygoticC) A) and B)
D) undefined

Question 16

Match each numbered statement to one of the terms listed below.
-process by which one species splits to form two species or more

Accepted Answer

A)  coevolution
B)  biological species concept
C)  morphological species concept
D)  speciation
E)  morphologyF) adaptationG) A) and D)
H) D) and E)

Question 17

According to the biological species concept,a species is defined when individuals of the same species

Accepted Answer

A)   differ widely in their DNA sequences.
B)   always have the same physical traits.
C)   are capable of interbreeding and producing fertile offspring.
D)   must reproduce asexually.E) A) and D)
F) C) and D)

Question 18

When populations of a species are separated by a physical barrier,thereby becoming geographically isolated and subsequently reproductively isolated from one another,________ speciation can occur.

Accepted Answer

The answer of When populations of a species are separated...

Question 19

Evolution by natural selection allows species to

Accepted Answer

A)   reduce mutation rate.
B)   decrease genetic variation.
C)   adjust to environmental changes.
D)   hybridize.E) B) and C)
F) C) and D)

Question 20

Close ecological interactions between two different species may lead to

Accepted Answer

A)   allopatric speciation.
B)   sympatric speciation.
C)   coevolution.
D)   geographic isolation.E) A) and D)
F) A) and B)

Exam 13: Adaptation and Species

Correct Answer
verified
In an area with seeds that have a thicke...
View Answer

Populations within a species are connected by

Correct Answer
verified

When populations of a species are separated by a physical barrier,thereby becoming geographically isolated and subsequently reproductively isolated from one another,________ speciation can occur.

Correct Answer
verified

Individual organisms with inherited characteristics that enable them to survive and reproduce are said to have greater ________ fitness than individuals who fail to survive and reproduce.

Correct Answer
verified
reproducti...
View Answer

A large population of animals is split in two by a physical barrier.Over time,the genetic makeup of the two resulting populations becomes more and more different until each population becomes a separate species.This is an example of

Correct Answer
verified

According to the biological species concept,a species is defined when individuals of the same species

Correct Answer
verified

Which of the following statements is true about adaptation?

Correct Answer
verified

Close ecological interactions between two different species may lead to

Correct Answer
verified

The rough-skinned newt produces one of the most potent toxins on the planet.Scientists in Oregon have found that as newts evolve to produce a more deadly toxin,their primary predator,the garter snake,evolves ways to resist the toxin.This is an example of

Correct Answer
verified

Correct Answer
verified
The second biologist would pro...
View Answer

Match each numbered statement to one of the terms listed below. -process by which one species splits to form two species or more

Correct Answer
verified

How does coevolution lead to speciation?

Correct Answer
verified

The fossils of two adult birds are found in a nest containing several fossilized eggs.Physically,the bird fossils look very different.Scientists are most likely to classify these species using

Correct Answer
verified

Two populations of lizards live in the same area.Which of the following evidence would convince you that they are two distinct species?

Correct Answer
verified

Evolution by natural selection allows species to

Correct Answer
verified

Identify whether a type of reproductive barrier is prezygotic or postzygotic. -hybrid sterility

Correct Answer
verified

Which of the following examples does NOT illustrate a difference in fitness that would lead to evolution by natural selection?

Correct Answer
verified

Which of the following is one of the three important characteristics of an adaptation?

Correct Answer
verified

A microbiologist discovers a Streptococcus bacterium living on a human scalp.She wants to know whether the bacterium she found is the same species as a Streptococcus bacterium she isolated from the throat of the same human.Explain how she could determine whether these bacteria are the same species.

Correct Answer
verified
The biological species definition will n...
View Answer

Identify whether a type of reproductive barrier is prezygotic or postzygotic. -gametic isolation

Correct Answer
verified

Exam 13: Adaptation and Species

Correct AnswerverifiedIn an area with seeds that have a thicke...View AnswerShow Answer

Populations within a species are connected by

Correct AnswerverifiedShow Answer

When populations of a species are separated by a physical barrier,thereby becoming geographically isolated and subsequently reproductively isolated from one another,________ speciation can occur.

Correct AnswerverifiedShow Answer

Individual organisms with inherited characteristics that enable them to survive and reproduce are said to have greater ________ fitness than individuals who fail to survive and reproduce.

Correct Answerverifiedreproducti...View AnswerShow Answer

A large population of animals is split in two by a physical barrier.Over time,the genetic makeup of the two resulting populations becomes more and more different until each population becomes a separate species.This is an example of

Correct AnswerverifiedShow Answer

According to the biological species concept,a species is defined when individuals of the same species

Correct AnswerverifiedShow Answer

Which of the following statements is true about adaptation?

Correct AnswerverifiedShow Answer

Close ecological interactions between two different species may lead to

Correct AnswerverifiedShow Answer

The rough-skinned newt produces one of the most potent toxins on the planet.Scientists in Oregon have found that as newts evolve to produce a more deadly toxin,their primary predator,the garter snake,evolves ways to resist the toxin.This is an example of

Correct AnswerverifiedShow Answer

Correct AnswerverifiedThe second biologist would pro...View AnswerShow Answer

Match each numbered statement to one of the terms listed below. -process by which one species splits to form two species or more

Correct AnswerverifiedShow Answer

How does coevolution lead to speciation?

Correct AnswerverifiedShow Answer

The fossils of two adult birds are found in a nest containing several fossilized eggs.Physically,the bird fossils look very different.Scientists are most likely to classify these species using

Correct AnswerverifiedShow Answer

Two populations of lizards live in the same area.Which of the following evidence would convince you that they are two distinct species?

Correct AnswerverifiedShow Answer

Evolution by natural selection allows species to

Correct AnswerverifiedShow Answer

Identify whether a type of reproductive barrier is prezygotic or postzygotic. -hybrid sterility

Correct AnswerverifiedShow Answer

Which of the following examples does NOT illustrate a difference in fitness that would lead to evolution by natural selection?

Correct AnswerverifiedShow Answer

Which of the following is one of the three important characteristics of an adaptation?

Correct AnswerverifiedShow Answer

A microbiologist discovers a Streptococcus bacterium living on a human scalp.She wants to know whether the bacterium she found is the same species as a Streptococcus bacterium she isolated from the throat of the same human.Explain how she could determine whether these bacteria are the same species.

Correct AnswerverifiedThe biological species definition will n...View AnswerShow Answer

Identify whether a type of reproductive barrier is prezygotic or postzygotic. -gametic isolation

Correct AnswerverifiedShow Answer

Correct Answer
verified
In an area with seeds that have a thicke...
View Answer

Correct Answer
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Correct Answer
verified

Correct Answer
verified
reproducti...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
The second biologist would pro...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
The biological species definition will n...
View Answer

Correct Answer
verified