Question 1

Norway rats (Rattus norvegicus) and roof rats (Rattus rattus) are different species.Occasionally,mating occurs if the two species are kept together in captivity.The resulting pregnancies are not successful and the embryos die.This is an example of

Accepted Answer

A)  mechanical isolation.
B)  hybrid sterility.
C)  hybrid inviability.
D)  lack of F2 fitness.E) A) and D)
F) All of the above

Question 2

When a diploid plant produces diploid gametes due to nondisjunction during meiosis,what occurs?

Accepted Answer

A)  Autoploidy is occurring.
B)  An increase in the number of chromosomes above the parent species occurs.
C)  A triploid or tetraploid plant may occur.
D)  All of the answer choices are true.E) All of the above
F) A) and C)

Question 3

What type of speciation requires a geographic barrier?

Accepted Answer

A)  sympatric speciation
B)  allopatric speciation
C)  Both sympatric and allopatric speciation require a geographic barrier.
D)  Neither sympatric or allopatric speciation require a geographic barrier.E) A) and B)
F) A) and D)

Question 4

________ is when one species splits into two species or when one species transforms into another over time.

Accepted Answer

A)  Reproductive isolation
B)  Convergent evolution
C)  The founder effect
D)  Speciation
E)  Both reproductive isolation and speciation are correct.F) None of the above
G) A) and D) D

Question 5

The morphological species concept involves the identification of certain structural traits,called ________,to distinguish one species from another.

Accepted Answer

A)  analogous traits
B)  homologous traits
C)  diagnostic traits
D)  convergent traitsE) None of the above
F) All of the above

Question 6

Reproductive isolation is more likely to occur when

Accepted Answer

A)  hybrids are more fit than members of the parent species.
B)  hybrids are less fit than members of the parent species.
C)  there are no differences between the fitness of the parent species and hybrids.
D)  None of the answer choices are true.E) B) and C)
F) None of the above

Question 7

Diagnostic traits can be used to distinguish between species of living organisms only.

Accepted Answer

A) True 
 B)False

Question 8

Scientists developed the ________ model after their studies of the fossil record revealed that some species appear quite suddenly and then remain essentially unchanged phenotypically for a long period of time.

Accepted Answer

A)  Hardy-Weinberg
B)  Urey-Miller
C)  gradualistic
D)  punctuated equilibriumE) A) and B)
F) A) and C)

Question 9

Which of the following would result in reproductive isolation?

Accepted Answer

A)  Two populations of crickets are indistinguishable in physical features,but the females in each group only come to the different songs of their males.
B)  Fruit flies on one Hawaiian island live for hundreds of generations and do not come in contact with fruit flies on another island except when blown there by rare tropical storms.
C)  One brood of the seventeen-year cicada emerged in 1987 (and will do so every 17 years) and lives a few months as adults; another brood emerged in 1992 (and will do so every 17 years) ; the larvae of both feed side-by-side on tree roots.
D)  A lion and a tiger mate in the artificial confines of a zoo but the offspring is infertile.
E)  All of the choices are correct.F) B) and E)
G) B) and D)

Question 10

Adaptive radiation occurs when organisms

Accepted Answer

A)  exploit a variety of new environments.
B)  remain in the same,stable environment.
C)  undergo autoploidy and alloploidy.
D)  occupy the same habitat as their ancestral species.E) B) and D)
F) None of the above

Question 11

________ is said to occur when a similar trait evolves in two unrelated species while ________ is when a species evolves in response to another species.

Accepted Answer

A)  Convergent evolution; coevolution
B)  Coevolution; convergent evolution
C)  Sympatric speciation; coevolution
D)  Allopatric speciation; convergent evolutionE) B) and C)
F) A) and B)

Question 12

A reproductive isolation mechanism includes any structural,functional,or behavioral characteristic that blocks reproductive ability.

Accepted Answer

A) True 
 B)False

Question 13

An insect population lives along the edge of a north-south mountain range.The populations from the east and west slope eventually join in a low northern pass and interbreed,producing fertile offspring,but they do not circle around the southern edge because of a desert barrier.When glaciers move southward,the populations are pushed south of the northern pass and are isolated.While isolated,the two populations develop enough differences over time that when the glaciers retreat north and the insects again share the same pass,they no longer mate at the same time,nor can they produce fertile offspring.These insects

Accepted Answer

A)  began as one species and therefore remain one species.
B)  were originally two species and remain two species.
C)  were originally two species but are now one species.
D)  were originally one species but are now two species.
E)  The number of species cannot be determined from the information given.F) B) and E)
G) D) and E)

Question 14

Reinforcement would eventually

Accepted Answer

A)  reduce the formation of hybrids.
B)  favor and therefore increase the formation of hybrids.
C)  have no effect on hybrid formation.
D)  increase the fitness of hybrids.E) All of the above
F) A) and B)

Question 15

Holt-Oram syndrome (HOS)is an autosomal dominant condition characterized in part by upper limb malformations.The most likely cause of this disorder would be a mutation in a Pax6 gene.

Accepted Answer

A) True 
 B)False

Question 16

Some genes can bring about radical changes in body shape and organs.The Pax6 gene is one such gene and is involved in

Accepted Answer

A)  determining the location of repeated structures in all vertebrates.
B)  the development of limbs.
C)  eye formation in all animals.
D)  breast cancer.E) A) and B)
F) C) and D)

Question 17

Members of the ancestral salamander species live in northern California.As they migrate southward,populations are separated by the Central Valley.With limited contact between populations on the east and west of the valley,genetic differences accumulate.What type of speciation occurs under these conditions?

Accepted Answer

A)  sympatric speciation
B)  allopatric speciation
C)  Both sympatric and allopatric speciation.
D)  Neither sympatric or allopatric.E) A) and D)
F) C) and D) B

Question 18

A cross between a male horse and a female donkey produces a mule.Mules are an example of

Accepted Answer

A)  zygote mortality.
B)  hybrid infertility.
C)  temporal isolation.
D)  gametic isolation.E) A) and D)
F) B) and C) B

Question 19

Explain the key differences between gradualistic equilibrium and punctuated equilibrium.

Accepted Answer

Gradualistic equilibrium is when new spe...

Question 20

In which model of evolution are many transitional forms predicted?

Accepted Answer

A)  punctuated equilibrium
B)  gradualistic
C)  Neither punctuated equilibrium nor gradualistic.
D)  Both punctuated equilibrium and gradualistic.E) All of the above
F) A) and D)

Exam 17: Speciation and Macroevolution

Norway rats (Rattus norvegicus) and roof rats (Rattus rattus) are different species.Occasionally,mating occurs if the two species are kept together in captivity.The resulting pregnancies are not successful and the embryos die.This is an example of

Correct Answer
verified

When a diploid plant produces diploid gametes due to nondisjunction during meiosis,what occurs?

Correct Answer
verified

What type of speciation requires a geographic barrier?

Correct Answer
verified

________ is when one species splits into two species or when one species transforms into another over time.

Correct Answer
verified
D

The morphological species concept involves the identification of certain structural traits,called ________,to distinguish one species from another.

Correct Answer
verified

Reproductive isolation is more likely to occur when

Correct Answer
verified

Diagnostic traits can be used to distinguish between species of living organisms only.

Correct Answer
verified

Scientists developed the ________ model after their studies of the fossil record revealed that some species appear quite suddenly and then remain essentially unchanged phenotypically for a long period of time.

Correct Answer
verified

Which of the following would result in reproductive isolation?

Correct Answer
verified

Adaptive radiation occurs when organisms

Correct Answer
verified

is said to occur when a similar trait evolves in two unrelated species while is when a species evolves in response to another species.

Correct Answer
verified

A reproductive isolation mechanism includes any structural,functional,or behavioral characteristic that blocks reproductive ability.

Correct Answer
verified

Correct Answer
verified

Reinforcement would eventually

Correct Answer
verified

Holt-Oram syndrome (HOS)is an autosomal dominant condition characterized in part by upper limb malformations.The most likely cause of this disorder would be a mutation in a Pax6 gene.

Correct Answer
verified

Some genes can bring about radical changes in body shape and organs.The Pax6 gene is one such gene and is involved in

Correct Answer
verified

Correct Answer
verified
B

A cross between a male horse and a female donkey produces a mule.Mules are an example of

Correct Answer
verified
B

Explain the key differences between gradualistic equilibrium and punctuated equilibrium.

Correct Answer
verified
Gradualistic equilibrium is when new spe...
View Answer

In which model of evolution are many transitional forms predicted?

Correct Answer
verified

Exam 17: Speciation and Macroevolution

Norway rats (Rattus norvegicus) and roof rats (Rattus rattus) are different species.Occasionally,mating occurs if the two species are kept together in captivity.The resulting pregnancies are not successful and the embryos die.This is an example of

Correct AnswerverifiedShow Answer

When a diploid plant produces diploid gametes due to nondisjunction during meiosis,what occurs?

Correct AnswerverifiedShow Answer

What type of speciation requires a geographic barrier?

Correct AnswerverifiedShow Answer

________ is when one species splits into two species or when one species transforms into another over time.

Correct AnswerverifiedD

The morphological species concept involves the identification of certain structural traits,called ________,to distinguish one species from another.

Correct AnswerverifiedShow Answer

Reproductive isolation is more likely to occur when

Correct AnswerverifiedShow Answer

Diagnostic traits can be used to distinguish between species of living organisms only.

Correct AnswerverifiedShow Answer

Scientists developed the ________ model after their studies of the fossil record revealed that some species appear quite suddenly and then remain essentially unchanged phenotypically for a long period of time.

Correct AnswerverifiedShow Answer

Which of the following would result in reproductive isolation?

Correct AnswerverifiedShow Answer

Adaptive radiation occurs when organisms

Correct AnswerverifiedShow Answer

________ is said to occur when a similar trait evolves in two unrelated species while ________ is when a species evolves in response to another species.

Correct AnswerverifiedShow Answer

A reproductive isolation mechanism includes any structural,functional,or behavioral characteristic that blocks reproductive ability.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Reinforcement would eventually

Correct AnswerverifiedShow Answer

Holt-Oram syndrome (HOS)is an autosomal dominant condition characterized in part by upper limb malformations.The most likely cause of this disorder would be a mutation in a Pax6 gene.

Correct AnswerverifiedShow Answer

Some genes can bring about radical changes in body shape and organs.The Pax6 gene is one such gene and is involved in

Correct AnswerverifiedShow Answer

Correct AnswerverifiedB

A cross between a male horse and a female donkey produces a mule.Mules are an example of

Correct AnswerverifiedB

Explain the key differences between gradualistic equilibrium and punctuated equilibrium.

Correct AnswerverifiedGradualistic equilibrium is when new spe...View AnswerShow Answer

In which model of evolution are many transitional forms predicted?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
D

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

is said to occur when a similar trait evolves in two unrelated species while is when a species evolves in response to another species.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
B

Correct Answer
verified
B

Correct Answer
verified
Gradualistic equilibrium is when new spe...
View Answer

Correct Answer
verified