Question 1

In Table 13.3,what can be concluded about the flower preferences of hummingbirds?

Accepted Answer

A)  They prefer pink flowers
B)  They prefer M. cardinalis no matter what color the flowers are
C)  They prefer yellow-orange flowers
D)  They prefer red flowers
E)  They prefer M. lewisii no matter what color the flowers areF) B) and E)
G) None of the above

Question 2

Bacteria cannot be classified using the biological definition of a species for which reason?

Accepted Answer

A)  The DNA sequences of all bacteria are more than 97% identical
B)  Bacteria cannot reproduce
C)  Bacteria are present everywhere and cannot be reproductively isolated from other bacteria
D)  Bacteria are asexual
E)  Bacteria do not evolveF) B) and E)
G) None of the above

Question 3

Three species of tigers have gone extinct due to overharvesting or habitat destruction.This is an example of:

Accepted Answer

A)  Mass extinction
B)  Background extinction rate
C)  Sympatric speciation
D)  Increased extinction rate by human activity
E)  Adaptive radiationF) A) and D)
G) A) and C)

Question 4

Polyploid means:

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 chromosomesF) A) and E)
G) A) and D)

Question 5

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

Question 6

According to the definition of a biological species,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 don't look alikeF) B) and E)
G) B) and D)

Question 7

Some flowers bloom in the spring while others bloom in the summer.This is an example of ____ reproductive isolation.

Accepted Answer

A)  postzygotic
B)  allopatric
C)  sympatric
D)  parapatric
E)  prezygoticF) C) and D)
G) None of the above

Question 8

The impact of a large meteorite with Earth would have most likely caused mass extinctions by:

Accepted Answer

A)  Causing a great prolonged rise in the earth's temperature and destroying plant life
B)  Creating large clouds of dust that blocked out sunlight
C)  Causing a great prolonged rise in the earth's temperature
D)  Creating large clouds of dust that blocked out sunlight and destroying plant life
E)  Destroying plant life on EarthF) A) and C)
G) B) and E)

Question 9

In the wild-type purple monkeyflower (M.lewisii) ,the dominant YUP allele prevents carotenoids from forming,leaving the pinkish-purple anthocyanin pigments to provide the petal color.A wild-type scarlet monkeyflower (M.cardinalis) has which genotype?

Accepted Answer

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

Question 10

The idea that evolution proceeds with long periods of stasis with relatively brief bursts of fast evolutionary change is:

Accepted Answer

A)  Temporal isolation
B)  Catastrophism
C)  Gradualism
D)  Punctuated equilibrium
E)  Temporal equilibriumF) B) and D)
G) C) 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 isolationF) A) and D)
G) A) and E)

Question 12

A sterile mule is produced by mating a horse and a donkey.This is an example of ____ reproductive isolation.

Accepted Answer

A)  prezygotic
B)  allopatric
C)  sympatric
D)  parapatric
E)  postzygoticF) A) and D)
G) A) and C)

Question 13

A horizontal branch in an evolutionary tree indicates:

Accepted Answer

A)  Gradualism
B)  Punctuated equilibrium
C)  Extinction
D)  Convergent evolution
E)  Temporal isolationF) A) and E)
G) All of the above

Question 14

Biologists divide mechanisms of reproductive isolation into:

Accepted Answer

A)  Sexual and geographic
B)  Prezygotic and sexual
C)  Postzygotic and geographic
D)  Sexual and postzygotic
E)  Prezygotic and postzygoticF) D) and E)
G) A) and B)

Question 15

By using fossil evidence,paleontologists have concluded that most species exist from:

Accepted Answer

A)  100 to 1,000 years before extinction
B)  1000 to 10,000 years before extinction
C)  One million to ten million years before extinction
D)  10,000 to 100,000 years before extinction
E)  100,000 to one million years before extinctionF) A) and E)
G) B) and D)

Question 16

What hypothesis were the researchers testing?

Accepted Answer

A)  That mutation in a single gene could cause a change in flower color and thus pollinator
B)  That mutation in multiple genes over a long period of time is required to change flower color and pollinators
C)  That pollinators do not choose which flowers to pollinate based on color
D)  That M. lewisii and M cardinalis are the same species
E)  That M. lewisii and M cardinalis are different speciesF) C) and D)
G) C) and E)

Question 17

Closely related plant species attracting different pollinators to create reproductive isolation is an example of:

Accepted Answer

A)  Sympatric speciation
B)  Allopatric speciation
C)  Parapatric speciation
D)  Dominance
E)  Co-dominanceF) A) and B)
G) B) and D)

Question 18

Centimeter-thin layers of earth that are rich in iridium give evidence to support the:

Accepted Answer

A)  Allopatric theory
B)  Ecological isolation theory
C)  Gradualism theory
D)  Impact theory
E)  Spontaneous generation theoryF) D) and E)
G) C) and E)

Question 19

The type of reproductive isolation in which two populations live in the same habitat but remain isolated from one another due to one being active during the daytime only and the other being active only during the night is:

Accepted Answer

A)  Behavioral isolation
B)  Gametic isolation
C)  Mechanical isolation
D)  Temporal isolation
E)  Sexual selectionF) A) and D)
G) A) and C)

Question 20

Mules are considered to be a distinct species because they produce fertile offspring when mated.

Accepted Answer

A) True 
 B)False

Exam 13: Speciation and Extinction

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

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

In Table 13.3,what can be concluded about the flower preferences of hummingbirds?

Correct AnswerverifiedShow Answer

Closely related plant species attracting different pollinators to create reproductive isolation is an example of:

Correct AnswerverifiedShow Answer

The impact of a large meteorite with Earth would have most likely caused mass extinctions by:

Correct AnswerverifiedShow Answer

A sterile mule is produced by mating a horse and a donkey.This is an example of ____ reproductive isolation.

Correct AnswerverifiedShow Answer

Bacteria cannot be classified using the biological definition of a species for which reason?

Correct AnswerverifiedShow Answer

A horizontal branch in an evolutionary tree indicates:

Correct AnswerverifiedShow Answer

Biologists divide mechanisms of reproductive isolation into:

Correct AnswerverifiedShow Answer

Some flowers bloom in the spring while others bloom in the summer.This is an example of ____ reproductive isolation.

Correct AnswerverifiedShow Answer

What hypothesis were the researchers testing?

Correct AnswerverifiedShow Answer

The idea that evolution proceeds with long periods of stasis with relatively brief bursts of fast evolutionary change is:

Correct AnswerverifiedShow Answer

Centimeter-thin layers of earth that are rich in iridium give evidence to support the:

Correct AnswerverifiedShow Answer

Mules are considered to be a distinct species because they produce fertile offspring when mated.

Correct AnswerverifiedShow Answer

According to the definition of a biological species,M.lewisii and M.cardinalis are different species for which reason?

Correct AnswerverifiedShow Answer

Polyploid means:

Correct AnswerverifiedShow Answer

Three species of tigers have gone extinct due to overharvesting or habitat destruction.This is an example of:

Correct AnswerverifiedShow Answer

In the wild-type purple monkeyflower (M.lewisii) ,the dominant YUP allele prevents carotenoids from forming,leaving the pinkish-purple anthocyanin pigments to provide the petal color.A wild-type scarlet monkeyflower (M.cardinalis) has which genotype?

Correct AnswerverifiedShow Answer

The type of reproductive isolation in which two populations live in the same habitat but remain isolated from one another due to one being active during the daytime only and the other being active only during the night is:

Correct AnswerverifiedShow Answer

By using fossil evidence,paleontologists have concluded that most species exist from:

Correct AnswerverifiedShow Answer

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