Question 1

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

Accepted Answer

A) True 
 B)False  False

Question 2

Scientists can fill in gaps in defining species by DNA sequence analysis.

Accepted Answer

A) True 
 B)False  True

Question 3

Birds are most closely related to

Accepted Answer

A) crocodiles. 
B) snakes. 
C) mammals. 
D) non-avian dinosaurs. 
E) amphibians. 
A) crocodiles. 
B) snakes. 
C) mammals. 
D) non-avian dinosaurs. 
E) amphibians. D

Question 4

The scientist given credit for devising the two-word naming system of all living organisms is

Accepted Answer

A) Aristotle. 
B) Charles Darwin. 
C) Gregor Mendel. 
D) Carolus Linnaeus. 
E) Louis Pasteur. 
A) Aristotle. 
B) Charles Darwin. 
C) Gregor Mendel. 
D) Carolus Linnaeus. 
E) Louis Pasteur.

Question 5

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 selection. 
A) behavioral isolation. 
B) gametic isolation. 
C) mechanical isolation. 
D) temporal isolation. 
E) sexual selection.

Question 6

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) outgroup 
E) postzygotic 
A) prezygotic 
B) allopatric 
C) sympatric 
D) outgroup 
E) postzygotic

Question 7

In the section "Investigating Life: Birds Do It,Bees Do It",bumblebees pollinated M.lewisii,whereas hummingbirds preferred the red-flowered M.cardinalis.If a hummingbird carries M.cardinalis pollen to M.lewisii,the resulting hybrid offspring are viable.M.lewisii and M.cardinalis are different species because of

Accepted Answer

A) post-zygotic barriers to reproduction. 
B) pre-zygotic barriers to reproduction. 
C) punctuated equilibrium. 
D) gradualism. 
E) asexual reproduction. 
A) post-zygotic barriers to reproduction. 
B) pre-zygotic barriers to reproduction. 
C) punctuated equilibrium. 
D) gradualism. 
E) asexual reproduction.

Question 8

Tortoises colonizing the different Galapagos islands and evolving into different species is an example of ____ speciation.

Accepted Answer

A) prezygotic 
B) allopatric 
C) postzygotic 
D) sympatric 
E) outgroup 
A) prezygotic 
B) allopatric 
C) postzygotic 
D) sympatric 
E) outgroup

Question 9

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

Accepted Answer

A) Homo 
B) sapiens 
C) Homo sapiens 
D) Animalia 
E) Eukarya 
A) Homo 
B) sapiens 
C) Homo sapiens 
D) Animalia 
E) Eukarya

Question 10

What is the least inclusive level of the hierarchical classification scheme?

Accepted Answer

A) domain 
B) phylum 
C) kingdom 
D) genus 
E) species 
A) domain 
B) phylum 
C) kingdom 
D) genus 
E) species

Question 11

The more heritable traits organisms share,the more taxonomic levels they share.

Accepted Answer

A) True 
 B)False

Question 12

A biological species is defined as a population whose members can interbreed,although the offspring may be infertile.

Accepted Answer

A) True 
 B)False

Question 13

In the section "Investigating Life: Birds Do It,Bees Do It",how did the researchers alter the colors of M.lewisii and M.cardinalis?

Accepted Answer

A) by looking for naturally occurring color variants of M.lewisii and M.cardinalis in the wild 
B) by creating transgenic flowers with the desired color 
C) by deleting the YUP locus 
D) by duplicating the YUP locus 
E) by selectively breeding M.lewisii and M.cardinalis,yielding hybrid colors similar to the other species 
A) by looking for naturally occurring color variants of M.lewisii and M.cardinalis in the wild 
B) by creating transgenic flowers with the desired color 
C) by deleting the YUP locus 
D) by duplicating the YUP locus 
E) by selectively breeding M.lewisii and M.cardinalis,yielding hybrid colors similar to the other species

Question 14

A sterile mule is produced by mating a horse and a donkey.From this observation you could conclude

Accepted Answer

A) that horses and donkeys are the same species. 
B) that horses and donkeys are different species. 
C) that mules are a result of macroevolution. 
D) increasing the number of mules in a population will affect the allele frequency in the next generation. 
E) the DNA sequences of horses and donkeys are more than 97% identical. 
A) that horses and donkeys are the same species. 
B) that horses and donkeys are different species. 
C) that mules are a result of macroevolution. 
D) increasing the number of mules in a population will affect the allele frequency in the next generation. 
E) the DNA sequences of horses and donkeys are more than 97% identical.

Question 15

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

Accepted Answer

A) They prefer pink flowers. 
B) They prefer red flowers. 
C) They prefer yellow-orange flowers. 
D) They prefer M.lewisii no matter what color the flowers are. 
E) They prefer M.cardinalis no matter what color the flowers arE. 
A) They prefer pink flowers. 
B) They prefer red flowers. 
C) They prefer yellow-orange flowers. 
D) They prefer M.lewisii no matter what color the flowers are. 
E) They prefer M.cardinalis no matter what color the flowers arE.

Question 16

In the section "Investigating Life: Birds Do It,Bees Do It",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) yup 
A) yup/yup 
B) YUP/YUP 
C) YUP/yup 
D) YUP 
E) yup

Question 17

The rate of background extinctions is

Accepted Answer

A) 0.1 to 1.0 species per year per million species. 
B) 0.001 to 0.01 species per year per million species. 
C) 1.0 to 10 species per year per million species. 
D) 10 to 100 species per year per million species. 
E) None of the answers are correct. 
A) 0.1 to 1.0 species per year per million species. 
B) 0.001 to 0.01 species per year per million species. 
C) 1.0 to 10 species per year per million species. 
D) 10 to 100 species per year per million species. 
E) None of the answers are correct.

Question 18

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) outgroup 
E) prezygotic 
A) postzygotic 
B) allopatric 
C) sympatric 
D) outgroup 
E) prezygotic

Question 19

A small angle for a branch point in an evolutionary tree indicates

Accepted Answer

A) extinction. 
B) punctuated equilibrium. 
C) gradualism. 
D) convergent evolution. 
E) temporal isolation. 
A) extinction. 
B) punctuated equilibrium. 
C) gradualism. 
D) convergent evolution. 
E) temporal isolation.

Question 20

Among evolutionary biologists the idea of sympatric speciation is controversial.

Accepted Answer

A) True 
 B)False

Exam 14: Speciation and Extinction

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

Scientists can fill in gaps in defining species by DNA sequence analysis.

Birds are most closely related to

The scientist given credit for devising the two-word naming system of all living organisms is

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

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

Tortoises colonizing the different Galapagos islands and evolving into different species is an example of ____ speciation.

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

What is the least inclusive level of the hierarchical classification scheme?

The more heritable traits organisms share,the more taxonomic levels they share.

A biological species is defined as a population whose members can interbreed,although the offspring may be infertile.

In the section "Investigating Life: Birds Do It,Bees Do It",how did the researchers alter the colors of M.lewisii and M.cardinalis?

A sterile mule is produced by mating a horse and a donkey.From this observation you could conclude

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

The rate of background extinctions is

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

A small angle for a branch point in an evolutionary tree indicates

Among evolutionary biologists the idea of sympatric speciation is controversial.

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