Question 1

Diversity through time is represented by the figure shown.Select the statement that presents an accurate interpretation.

Accepted Answer

A)  There were more families of organisms during the Ordovician than the Tertiary.
B)  There were more families of organisms during the Cambrian than the Carboniferous.
C)  There were more families of organisms during the Jurassic than the Tertiary.
D)  There were more families of organisms during the Cretaceous the Tertiary.
E)  There were more families of organisms during Tertiary than the Cambrian.F) All of the above
G) A) and D)

Question 2

All of the following are examples of prezygotic isolating mechanisms except

Accepted Answer

A)  ecological isolation.
B)  temporal isolation.
C)  mechanical incompatibility.
D)  hybrid sterility.
E)  prevention of gamete fusion.F) A) and E)
G) A) and D)

Question 3

A type of isolating mechanism that leads to reproductive isolation by preventing the formation of hybrid zygotes is called _____________ isolating mechanism.

Accepted Answer

A)  hybridization
B)  postzygotic
C)  prezygotic
D)  adaptive
E)  differentialF) A) and D)
G) B) and C)

Question 4

The basic unit of evolution and taxonomy is the

Accepted Answer

A)  ecosystem.
B)  population.
C)  species.
D)  community.
E)  nichE.F) None of the above
G) C) and E)

Question 5

The biological species concept proposed by Ernst Mayr emphasizes all of the following except

Accepted Answer

A)  hybridization between different species.
B)  production of fertile offspring within the species.
C)  natural populations.
D)  reproductive isolation from other species.
E)  interbreeding within the species.F) A) and D)
G) B) and D)

Question 6

Which one of the following factors was not important in creating the adaptive radiation of Drosophila in the Hawaiian islands?

Accepted Answer

A)  The Hawaiian islands are an archipelago.
B)  New islands are constantly being formed.
C)  High rates of mutation due to radioactive materials in the lava flows.
D)  The existence of land islands called kipukas.
E)  The presence of unoccupied niches.F) A) and E)
G) B) and E)

Question 7

Diversity through time is represented by the figure shown.Following periods of extinction the total numbers of families of organisms

Accepted Answer

A)  usually recovered within a million years or less,showing remarkable adaptive radiation.
B)  usually recovered within about ten million years,and have increased since the beginning of life.
C)  usually recovered within about ten million years,indicating the mechanism is probably punctuated equilibrium.
D)  usually did not recover at all-the total numbers gradually decline over time.E) A) and B)
F) B) and C)

Question 8

Which one of the following is not an example of a reproductive isolating mechanism?

Accepted Answer

A)  sympatric isolation
B)  behavioral isolation
C)  ecological isolation
D)  mechanical isolation
E)  temporal isolationF) A) and E)
G) A) and C)

Question 9

Which of the following phrases is not an essential part of the biological species concept?

Accepted Answer

A)  morphologically distinct
B)  reproductive isolation
C)  independent evolutionary unit
D)  actually or potentially interbreeding
E)  no gene flow with other speciesF) B) and C)
G) None of the above

Question 10

Species formation among alpine buttercups in New Zealand was promoted by

Accepted Answer

A)  mechanical isolation.
B)  gametic isolation.
C)  periodic isolation by glaciation.
D)  temporal isolation.
E)  geographical isolation.F) A) and E)
G) A) and D)

Question 11

To ensure that individuals mate with their own species a variety of communication cues have evolved.Select the exception.

Accepted Answer

A)  vocalizations
B)  pheromones
C)  visual signals such as body colors
D)  visual signals such as rituals,dances
E)  hormonesF) A) and C)
G) A) and B)

Question 12

Which of the following statements describe the assumptions of the gradualism model?

Accepted Answer

A)  Evolution occurs in spurts,between which there are long periods in where there is little evolutionary change.
B)  Evolution proceeds incrementally,with incremental change in a given evolutionary line.
C)  There is variability in the rates of evolution.
D)  Speciation is essential to evolution.
E)  Periods of stasis occur.F) A) and E)
G) A) and C)

Question 13

Many male songbirds have very distinctive songs that are used to attract females.These songs are an example of a(n) ________ isolating mechanism.

Accepted Answer

A)  ecological
B)  behavioral
C)  temporal
D)  mechanical
E)  gameticF) B) and E)
G) A) and B)

Question 14

Adaptive radiation is best described as the

Accepted Answer

A)  existence of groups of closely related species recently evolved from a common ancestor.
B)  existence of groups of distantly related species recently evolved from a common ancestor.
C)  existence of groups of closely related species recently evolved from different ancestors through hybridization.
D)  existence of individuals of closely related species that originated in different areas within diverse habitats,but that have rejoined as a single species.E) B) and C)
F) None of the above

Question 15

Natural selection promotes speciation by all of the following except

Accepted Answer

A)  strengthening isolating mechanisms.
B)  restricting gene flow.
C)  character displacement.
D)  promoting polyploidy.
E)  affecting the survivorship of hybrids.F) B) and E)
G) B) and D)

Question 16

The production of new species through hybridization is sometimes made easier in plants by

Accepted Answer

A)  adaptation.
B)  meiosis.
C)  parthenogenesis.
D)  hybrid sterility.
E)  polyploidy.F) A) and D)
G) A) and C)

Question 17

The phenomenon where one species diverges into many by occupying a series of different habitats within a region is called __________ __________.

Accepted Answer

The answer of The phenomenon where one species diverges into...

Question 18

Several species of sea urchins may inhabit the same tide pool and their reproductive periods overlap.Although they practice external fertilization,they seldom interbreed because eggs produce chemicals that are only attractive to sperm of their own species.This is an example of a _________ barrier involving ________________.

Accepted Answer

A)  prezygotic;geographic isolation
B)  prezygotic;temporal isolation
C)  prezygotic;gametic isolation
D)  postzygotic;gametic isolation
E)  postzygotic;hybrid infertilityF) B) and D)
G) A) and B)

Question 19

A type of isolating mechanism that leads to reproductive isolation after a hybrid zygote has formed is called _____________ isolating mechanism.

Accepted Answer

A)  hybridization
B)  postzygotic
C)  prezygotic
D)  adaptive
E)  differentialF) A) and C)
G) A) and D)

Question 20

If populations within a common area split into species,the process is known as

Accepted Answer

A)  sympatric speciation.
B)  allopatric speciation.
C)  racial speciation.
D)  ecotypical speciation.
E)  reproductive speciation.F) C) and D)
G) B) and C)

Exam 22: The Origin of Species

Which of the following phrases is not an essential part of the biological species concept?

Correct Answer
verified

A type of isolating mechanism that leads to reproductive isolation by preventing the formation of hybrid zygotes is called _____________ isolating mechanism.

Correct Answer
verified

Diversity through time is represented by the figure shown.Following periods of extinction the total numbers of families of organisms

Correct Answer
verified

All of the following are examples of prezygotic isolating mechanisms except

Correct Answer
verified

Correct Answer
verified

Adaptive radiation is best described as the

Correct Answer
verified

Which of the following statements describe the assumptions of the gradualism model?

Correct Answer
verified

The production of new species through hybridization is sometimes made easier in plants by

Correct Answer
verified

To ensure that individuals mate with their own species a variety of communication cues have evolved.Select the exception.

Correct Answer
verified

The basic unit of evolution and taxonomy is the

Correct Answer
verified

Diversity through time is represented by the figure shown.Select the statement that presents an accurate interpretation.

Correct Answer
verified

The phenomenon where one species diverges into many by occupying a series of different habitats within a region is called .

Correct Answer
verified

Which one of the following factors was not important in creating the adaptive radiation of Drosophila in the Hawaiian islands?

Correct Answer
verified

A type of isolating mechanism that leads to reproductive isolation after a hybrid zygote has formed is called _____________ isolating mechanism.

Correct Answer
verified

If populations within a common area split into species,the process is known as

Correct Answer
verified

The biological species concept proposed by Ernst Mayr emphasizes all of the following except

Correct Answer
verified

Many male songbirds have very distinctive songs that are used to attract females.These songs are an example of a(n) ________ isolating mechanism.

Correct Answer
verified

Species formation among alpine buttercups in New Zealand was promoted by

Correct Answer
verified

Natural selection promotes speciation by all of the following except

Correct Answer
verified

Which one of the following is not an example of a reproductive isolating mechanism?

Correct Answer
verified

Exam 22: The Origin of Species

Which of the following phrases is not an essential part of the biological species concept?

Correct AnswerverifiedShow Answer

A type of isolating mechanism that leads to reproductive isolation by preventing the formation of hybrid zygotes is called _____________ isolating mechanism.

Correct AnswerverifiedShow Answer

Diversity through time is represented by the figure shown.Following periods of extinction the total numbers of families of organisms

Correct AnswerverifiedShow Answer

All of the following are examples of prezygotic isolating mechanisms except

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Adaptive radiation is best described as the

Correct AnswerverifiedShow Answer

Which of the following statements describe the assumptions of the gradualism model?

Correct AnswerverifiedShow Answer

The production of new species through hybridization is sometimes made easier in plants by

Correct AnswerverifiedShow Answer

To ensure that individuals mate with their own species a variety of communication cues have evolved.Select the exception.

Correct AnswerverifiedShow Answer

The basic unit of evolution and taxonomy is the

Correct AnswerverifiedShow Answer

Diversity through time is represented by the figure shown.Select the statement that presents an accurate interpretation.

Correct AnswerverifiedShow Answer

The phenomenon where one species diverges into many by occupying a series of different habitats within a region is called __________ __________.

Correct AnswerverifiedShow Answer

Which one of the following factors was not important in creating the adaptive radiation of Drosophila in the Hawaiian islands?

Correct AnswerverifiedShow Answer

A type of isolating mechanism that leads to reproductive isolation after a hybrid zygote has formed is called _____________ isolating mechanism.

Correct AnswerverifiedShow Answer

If populations within a common area split into species,the process is known as

Correct AnswerverifiedShow Answer

The biological species concept proposed by Ernst Mayr emphasizes all of the following except

Correct AnswerverifiedShow Answer

Many male songbirds have very distinctive songs that are used to attract females.These songs are an example of a(n) ________ isolating mechanism.

Correct AnswerverifiedShow Answer

Species formation among alpine buttercups in New Zealand was promoted by

Correct AnswerverifiedShow Answer

Natural selection promotes speciation by all of the following except

Correct AnswerverifiedShow Answer

Which one of the following is not an example of a reproductive isolating mechanism?

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

The phenomenon where one species diverges into many by occupying a series of different habitats within a region is called .

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