Question 1

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) C) and D)
G) A) and C)

Question 2

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) None of the above

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) C) and D)
G) B) and D)

Question 4

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 B)
G) A) and C)

Question 5

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 E)
G) B) and C)

Question 6

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 E)
G) B) and C)

Question 7

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) A) and D)
G) A) and C)

Question 8

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) A) and E)

Question 9

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) A) and B)
G) A) and C)

Question 10

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) None of the above
G) A) and B)

Question 11

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) A) and B)
G) A) and E)

Question 12

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) All of the above
G) B) and E)

Question 13

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) A) and C)
G) B) and D)

Question 14

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 D)

Question 15

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 C)
G) All of the above

Question 16

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) D) and E)
G) B) and C)

Question 17

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 C)
G) D) and E)

Question 18

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) All of the above
G) C) and D)

Question 19

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) B) and E)
G) A) and C)

Question 20

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 E)

Exam 14: Speciation and Extinction

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

Correct AnswerverifiedShow Answer

Which of the following is NOT an example of macroevolution?

Correct AnswerverifiedShow Answer

A horizontal branch in an evolutionary tree indicates

Correct AnswerverifiedShow Answer

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

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

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

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

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

Correct AnswerverifiedShow Answer

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

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

Phylogenetics

Correct AnswerverifiedShow Answer

An example of polyploidy is found in a plant

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Evolution of a new species occurs

Correct AnswerverifiedShow Answer

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

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?

Correct AnswerverifiedShow Answer

The process by which species cease to exist

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow 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

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

Correct Answer
verified

Correct Answer
verified