Question 1

In the section "Investigating Life: Birds Do It,Bees Do It",the experiment supports that a change in just one gene locus may have jump-started speciation in Mimulus.This is an example of

Accepted Answer

A)  pre-zygotic barriers to reproduction.
B)  post-zygotic barriers to reproduction.
C)  gradualism.
D)  punctuated equilibrium.
E)  asexual reproduction.F) B) and C)
G) A) and D)

Question 2

The type of reproductive isolation in which offspring are infertile because their chromosomes cannot align correctly during meiosis because of a different number of chromosomes being inherited from the two parents is

Accepted Answer

A)  gametic isolation.
B)  mechanical isolation.
C)  hybrid infertility.
D)  hybrid inviability.
E)  temporal isolation.F) A) and E)
G) C) and D)

Question 3

An example of polyploidy is found in a plant

Accepted Answer

A)  having an abnormal number of two or more individual chromosomes.
B)  having only one set of chromosomes.
C)  having three or more chromosomes.
D)  having an abnormal number of one particular chromosome.
E)  having three or more sets of chromosomes.F) A) and B)
G) C) and D)

Question 4

The types of living organisms on Earth have changed over time - new species have originated and existing species have disappeared.This is an example of

Accepted Answer

A)  speciation.
B)  extinction.
C)  macroevolution.
D)  alternation of generations.
E)  hybridization.F) C) and D)
G) D) and E)

Question 5

The process by which species cease to exist

Accepted Answer

A)  has never occurred.
B)  is speciation.
C)  is extinction.
D)  is occurring today at a faster rate than ever before.
E)  All answers are correct.F) C) and E)
G) A) and C)

Question 6

If a sheep and goat are mated,their offspring dies as an embryo.This is an example of ____ reproductive isolation.

Accepted Answer

A)  prezygotic
B)  allopatric
C)  sympatric
D)  postzygotic
E)  outgroupF) All of the above
G) A) and E)

Question 7

The observation that although fresh water habitats account for only 1% of the Earth's water,they are home to 36% of the known species of fish is due to ____ speciation.

Accepted Answer

A)  prezygotic
B)  postzygotic
C)  allopatric
D)  sympatric
E)  outgroupF) B) and D)
G) B) and C)

Question 8

In the section "Investigating Life: Birds Do It,Bees Do It",when the researchers crossed M.lewisii and M.cardinalis,the hybrids had which genotype?

Accepted Answer

A)  YUP/yup
B)  yup/yup
C)  YUP/YUP
D)  YUP
E)  yupF) B) and E)
G) A) and C)

Question 9

Phylogenetics

Accepted Answer

A)  is the study of evolutionary relationships among species.
B)  is the science of describing,naming,and classifying species.
C)  are inherited attributes.
D)  are features only found in living species.
E)  are species unrelated and used for comparison.F) A) and B)
G) C) and E)

Question 10

Evolution of a new species occurs

Accepted Answer

A)  in sexually-reproducing organisms.
B)  in asexually-reproducing organisms.
C)  typically over long periods of time.
D)  All answers are correct.
E)  allopatrically and sympatrically.F) C) and D)
G) B) and E)

Question 11

The type of reproductive isolation in which two populations are separated due to the sperm cells of one not being able to recognize the egg cells of the other is

Accepted Answer

A)  hybrid inviability.
B)  gametic isolation.
C)  temporal isolation.
D)  hybrid infertility.
E)  ecological isolation.F) B) and C)
G) None of the above

Question 12

In the section "Investigating Life: Birds Do It,Bees Do It",M.lewisii and M.cardinalis are different species for which reason?

Accepted Answer

A)  If they breed they do not form viable offspring.
B)  If they breed they do not form fertile offspring.
C)  They live on different continents.
D)  They do not breed in the wilD.
E)  They do not look alikE.F) A) and E)
G) D) and E)

Question 13

Conservation biologists are often concerned that when the population size of an endangered species becomes too small it is at risk of extinction for which reason?

Accepted Answer

A)  They can no longer evolve.
B)  Their rate of breeding will decline.
C)  They may be more susceptible to changes in the environment or disease.
D)  They are at risk of sympatric isolation.
E)  They are at risk of developing prezygotic barriers to reproduction.F) B) and D)
G) B) and C)

Question 14

Birds use specific songs,coloring,and mating dances to attract mates of their species.This is an example of ____ reproductive isolation.

Accepted Answer

A)  postzygotic
B)  allopatric
C)  prezygotic
D)  sympatric
E)  outgroupF) None of the above
G) All of the above

Question 15

A horizontal branch in an evolutionary tree indicates

Accepted Answer

A)  gradualism.
B)  punctuated equilibrium.
C)  extinction.
D)  convergent evolution.
E)  temporal isolation.F) B) and D)
G) All of the above

Question 16

In the section "Investigating Life: Birds Do It,Bees Do It",what can be concluded about the flower preferences of hummingbirds?

Accepted Answer

A)  They prefer pink flowers.
B)  They prefer M.cardinalis in both the natural and selected colors tested.
C)  They prefer yellow-orange flowers.
D)  They prefer red flowers.
E)  They prefer M.lewisii in both the natural and selected colors tested.F) B) and E)
G) A) and B)

Question 17

Which of the following is NOT an example of macroevolution?

Accepted Answer

A)  One species of birds evolves feathers.
B)  One species of birds evolves into many species of birds.
C)  One species of dinosaurs evolves into the first mammal.
D)  One species of mammals evolves into a new species of mammal.
E)  All answers are correct.F) A) and B)
G) C) and D)

Question 18

Species such as mice have a better chance of surviving sudden environmental change than elephants because

Accepted Answer

A)  elephants reproduce much more slowly than mice.
B)  elephants require larger habitats than mice.
C)  elephants eat more than mice.
D)  elephants live longer than mice.
E)  elephants have a more selective diet than micE.F) A) and B)
G) A) and E)

Question 19

The scientific name of humans is Homo sapiens.What is the genus of humans?

Accepted Answer

A)  Homo
B)  sapiens
C)  Homo sapiens
D)  Animalia
E)  EukaryaF) A) and E)
G) D) and E)

Question 20

It is believed that the two main reasons for mass extinctions in Earth's history have been

Accepted Answer

A)  collision between Earth and a large celestial body and human intervention.
B)  global warming and human intervention.
C)  human intervention and shifting of Earth's continents.
D)  global warming and shifting of Earth's continents.
E)  collision between Earth and a large celestial body and shifting of Earth's continents.F) A) and B)
G) B) and D)

Exam 14: Speciation and Extinction

An example of polyploidy is found in a plant

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Phylogenetics

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The types of living organisms on Earth have changed over time - new species have originated and existing species have disappeared.This is an example of

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In the section "Investigating Life: Birds Do It,Bees Do It",what can be concluded about the flower preferences of hummingbirds?

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Evolution of a new species occurs

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The type of reproductive isolation in which offspring are infertile because their chromosomes cannot align correctly during meiosis because of a different number of chromosomes being inherited from the two parents is

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In the section "Investigating Life: Birds Do It,Bees Do It",the experiment supports that a change in just one gene locus may have jump-started speciation in Mimulus.This is an example of

Correct AnswerverifiedShow Answer

Birds use specific songs,coloring,and mating dances to attract mates of their species.This is an example of ____ reproductive isolation.

Correct AnswerverifiedShow Answer

Conservation biologists are often concerned that when the population size of an endangered species becomes too small it is at risk of extinction for which reason?

Correct AnswerverifiedShow Answer

The type of reproductive isolation in which two populations are separated due to the sperm cells of one not being able to recognize the egg cells of the other is

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The scientific name of humans is Homo sapiens.What is the genus of humans?

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If a sheep and goat are mated,their offspring dies as an embryo.This is an example of ____ reproductive isolation.

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Which of the following is NOT an example of macroevolution?

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In the section "Investigating Life: Birds Do It,Bees Do It",M.lewisii and M.cardinalis are different species for which reason?

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Species such as mice have a better chance of surviving sudden environmental change than elephants because

Correct AnswerverifiedShow Answer

In the section "Investigating Life: Birds Do It,Bees Do It",when the researchers crossed M.lewisii and M.cardinalis,the hybrids had which genotype?

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A horizontal branch in an evolutionary tree indicates

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The process by which species cease to exist

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It is believed that the two main reasons for mass extinctions in Earth's history have been

Correct AnswerverifiedShow Answer

The observation that although fresh water habitats account for only 1% of the Earth's water,they are home to 36% of the known species of fish is due to ____ speciation.

Correct AnswerverifiedShow Answer

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