Question 1

During spring time in Maine,male moose often enter a cow pasture and begin calling to the female cows.The moose may even try to mount the female but the male moose genitalia do not fit properly inside the female cow genitalia.This is an example of

Accepted Answer

A)  mechanical isolation.
B)  temporal isolation.
C)  habitat isolation.
D)  behavioral isolation.
E)  gametic isolation.F) None of the above
G) A) and B)

Question 2

Two species of three-spined stickleback fish live in a single lake in British Columbia.They are closely related but occupy different niches.They exist nowhere else.These species most likely arose by sympatric speciation from a single species of three-spined stickleback.

Accepted Answer

A) True 
 B)False

Question 3

A liger is the offspring of a male lion and a female tiger.Male ligers cannot produce offspring.This is an example of

Accepted Answer

A)  gametic isolation.
B)  hybrid inviability.
C)  hybrid sterility.
D)  hybrid breakdown.
E)  mechanical isolation.F) A) and E)
G) None of the above

Question 4

Sperm from a slate-pencil sea urchin are moved by the ocean currents towards eggs from a rock boring sea urchin.The rock boring urchin eggs are fertilized,but only complete the first three rounds of embryonic cell division.What type of reproductive isolation is at work in this example?

Accepted Answer

A)  mechanical isolation.
B)  gametic isolation.
C)  habitat isolation.
D)  hybrid sterility
E)  hybrid inviability.F) A) and C)
G) D) and E)

Question 5

The phenomenon in which one region of the body grows faster than another among different species is called

Accepted Answer

A)  pattern formation.
B)  apoptosis.
C)  cell migration.
D)  phenotypic variation.
E)  heterochrony.F) B) and E)
G) A) and C)

Question 6

Under the ___________ ,species are identified based on their unique habitat requirements.

Accepted Answer

A)  phylogenetic species concept
B)  biological species concept
C)  evolutionary species concept
D)  ecological species concept
E)  general lineage conceptF) B) and D)
G) None of the above

Question 7

You discover a new species of lily that has 10 chromosomes (2n=10) .Genetic testing reveals that it arose from the interbreeding of two other species of lilies,one of which has 12 chromosomes (2n=12) ,and one of which has 8 chromosomes (2n=8) .What is the correct term for the new lily species?

Accepted Answer

A)  autopolyploid
B)  allopolyploid
C)  allodiploid
D)  allotetrapoloidE) B) and C)
F) B) and D)

Question 8

The process of evolutionary changes that result in formation of new species is called

Accepted Answer

A)  microevolution.
B)  artificial selection.
C)  macroevolution.
D)  natural selection.E) A) and C)
F) All of the above

Question 9

Dandelions,Taraxacum officinale,are plants that asexually produce fruitlike propagules.Sexual reproduction is very rare in this organism.Which species concept would be least useful in defining dandelions as a species?

Accepted Answer

A)  Evolutionary lineage concept.
B)  Biological species concept.
C)  Ecological species concept.
D)  General lineage concept.
E)  All of these species concepts would be equally useful.F) D) and E)
G) None of the above

Question 10

Approximately 3.5 million years ago the Isthmus of Panama formed.This new landmass severed the connection between the Pacific Ocean and the Caribbean Sea.An ancestral fish population (porkfish) was split in two by this event;the two populations no longer interbreed and are two distinct species.This type of speciation is called

Accepted Answer

A)  allopatric speciation.
B)  parapatric speciation.
C)  hybridization.
D)  sympatric speciation.
E)  sexual selection due to ecological variation.F) B) and E)
G) B) and C)

Question 11

Some breeds of dogs that are specialized to retrieve objects from bodies of water have webbing between their toes,while most other breeds do not have webbing.Variation in what cellular process is most likely responsible for this difference?

Accepted Answer

A)  cell division
B)  apoptosis (cell death) 
C)  cell differentiation
D)  cell migration
E)  cell axis developmentF) B) and E)
G) A) and B)

Question 12

What mechanism makes it difficult to classify bacteria into distinct species groups?

Accepted Answer

A)  vertical evolution.
B)  horizontal gene transfer.
C)  sexual reproduction.
D)  asexual reproduction.
E)  low mutation rates.F) B) and D)
G) A) and C)

Question 13

Sympatric speciation differs from allopatric speciation because in sympatric speciation

Accepted Answer

A)  a population becomes geographically isolated.
B)  two populations of the same species merge to form a single population.
C)  polyploidy must first arise.
D)  hybrid zones form.
E)  there are no physcial barriers against interbreeding.F) C) and D)
G) A) and E)

Question 14

A storm blows a small group of migrating birds off course and they land on an island,where they remain for 100 generations.At this time,a second storm brings more birds from the mainland population to the island.These new birds cannot mate with the established birds,even though they are originally from the same population.What mechanisms are likely to have been involved in bringing about this speciation? Select all that apply.

Accepted Answer

A)   Genetic drift
B)   Polyploidy in the mainland bird population.
C)    Founder effect
D)   Adaptation to a new ecological nicheE) B) and C)
F) All of the above

Question 15

Which gene is correctly matched with its evolutionary significance?

Accepted Answer

A)  The Hox genes - evolution of body plans.
B)  The BMP4 gene - evolution of lungs.
C)  The gremlin gene - evolution mating songs.
D)  The Hox genes - development of skull shape.
E)  The BMP4 gene - evolution of polyploidy.F) A) and B)
G) B) and D)

Exam 20: Origin of Species and Macroevolution

Correct Answer
verified

Dandelions,Taraxacum officinale,are plants that asexually produce fruitlike propagules.Sexual reproduction is very rare in this organism.Which species concept would be least useful in defining dandelions as a species?

Correct Answer
verified

Some breeds of dogs that are specialized to retrieve objects from bodies of water have webbing between their toes,while most other breeds do not have webbing.Variation in what cellular process is most likely responsible for this difference?

Correct Answer
verified

Sperm from a slate-pencil sea urchin are moved by the ocean currents towards eggs from a rock boring sea urchin.The rock boring urchin eggs are fertilized,but only complete the first three rounds of embryonic cell division.What type of reproductive isolation is at work in this example?

Correct Answer
verified

Two species of three-spined stickleback fish live in a single lake in British Columbia.They are closely related but occupy different niches.They exist nowhere else.These species most likely arose by sympatric speciation from a single species of three-spined stickleback.

Correct Answer
verified

The phenomenon in which one region of the body grows faster than another among different species is called

Correct Answer
verified

Which gene is correctly matched with its evolutionary significance?

Correct Answer
verified

What mechanism makes it difficult to classify bacteria into distinct species groups?

Correct Answer
verified

Correct Answer
verified

The process of evolutionary changes that result in formation of new species is called

Correct Answer
verified

A liger is the offspring of a male lion and a female tiger.Male ligers cannot produce offspring.This is an example of

Correct Answer
verified

Under the ___________ ,species are identified based on their unique habitat requirements.

Correct Answer
verified

Sympatric speciation differs from allopatric speciation because in sympatric speciation

Correct Answer
verified

During spring time in Maine,male moose often enter a cow pasture and begin calling to the female cows.The moose may even try to mount the female but the male moose genitalia do not fit properly inside the female cow genitalia.This is an example of

Correct Answer
verified

You discover a new species of lily that has 10 chromosomes (2n=10) .Genetic testing reveals that it arose from the interbreeding of two other species of lilies,one of which has 12 chromosomes (2n=12) ,and one of which has 8 chromosomes (2n=8) .What is the correct term for the new lily species?

Correct Answer
verified

Exam 20: Origin of Species and Macroevolution

Correct AnswerverifiedShow Answer

Dandelions,Taraxacum officinale,are plants that asexually produce fruitlike propagules.Sexual reproduction is very rare in this organism.Which species concept would be least useful in defining dandelions as a species?

Correct AnswerverifiedShow Answer

Some breeds of dogs that are specialized to retrieve objects from bodies of water have webbing between their toes,while most other breeds do not have webbing.Variation in what cellular process is most likely responsible for this difference?

Correct AnswerverifiedShow Answer

Sperm from a slate-pencil sea urchin are moved by the ocean currents towards eggs from a rock boring sea urchin.The rock boring urchin eggs are fertilized,but only complete the first three rounds of embryonic cell division.What type of reproductive isolation is at work in this example?

Correct AnswerverifiedShow Answer

Two species of three-spined stickleback fish live in a single lake in British Columbia.They are closely related but occupy different niches.They exist nowhere else.These species most likely arose by sympatric speciation from a single species of three-spined stickleback.

Correct AnswerverifiedShow Answer

The phenomenon in which one region of the body grows faster than another among different species is called

Correct AnswerverifiedShow Answer

Which gene is correctly matched with its evolutionary significance?

Correct AnswerverifiedShow Answer

What mechanism makes it difficult to classify bacteria into distinct species groups?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

The process of evolutionary changes that result in formation of new species is called

Correct AnswerverifiedShow Answer

A liger is the offspring of a male lion and a female tiger.Male ligers cannot produce offspring.This is an example of

Correct AnswerverifiedShow Answer

Under the ___________ ,species are identified based on their unique habitat requirements.

Correct AnswerverifiedShow Answer

Sympatric speciation differs from allopatric speciation because in sympatric speciation

Correct AnswerverifiedShow Answer

During spring time in Maine,male moose often enter a cow pasture and begin calling to the female cows.The moose may even try to mount the female but the male moose genitalia do not fit properly inside the female cow genitalia.This is an example of

Correct AnswerverifiedShow Answer

You discover a new species of lily that has 10 chromosomes (2n=10) .Genetic testing reveals that it arose from the interbreeding of two other species of lilies,one of which has 12 chromosomes (2n=12) ,and one of which has 8 chromosomes (2n=8) .What is the correct term for the new lily species?

Correct AnswerverifiedShow Answer

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Correct Answer
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Correct Answer
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Correct Answer
verified

Correct Answer
verified