Question 1

Bread wheat (2 n =42) , which is a staple food for about a third of the world's population, evolved from two wheat-like ancestors (both 2 n =42) ; therefore, bread wheat is a ____ organism. ​

Accepted Answer

A)  diploid
B)  hexaploid
C)  triploid
D)  tetraploi

Question 2

Match between columns
                        Premises: temporal isolation

Accepted Answer

The Answer of hybrid offspring cannot produce gametes and species is...

Question 3

Match between columns
                        Premises: gametic isolation

Accepted Answer

The Answer of species cannot physically mate and hybrid offspring is...

Question 4

Match between columns
                        Premises: all individuals of a species share measurable traits that distinguish them other species

Accepted Answer

The Answer of allopolyploidy and species cluster and phylogenetic species is...

Question 5

Postzygotic isolating mechanisms occur when the offspring ____.

Accepted Answer

A)  survive to reproductive age
B)  have vigorous health
C)  inherit the same numbers of chromosomes from each parent
D)  inherit different developmental instructions from each parent
E)  have hybrid viability

Question 6

When allopatric populations reestablish contact upon elimination of a geographical barrier, ____ has occurred. ​

Accepted Answer

A)  species clustering
B)  secondary contact
C)  parapatric speciation
D)  sympatric speciation
E)  evolutionary convergence

Question 7

A plant with a very small tubular type of flower that cannot be pollinated by a large honeybee is exhibiting which prezygotic isolating mechanism? ​

Accepted Answer

A)  behavioral
B)  ecological
C)  gametic
D)  mechanical
E)  temporal

Question 8

An allopolyploid is ____.

Accepted Answer

A)  a polyploid that arose from hybridization
B)  a species that arose parapatrically
C)  an allopatrically arising species
D)  a polyploid arising from a single diploid individual
E)  any sympatrically arising species

Question 9

A sterile hybrid plant can form a new fertile species if its chromosomes are doubled. This is referred to as ____. ​

Accepted Answer

A)  allopatric speciation
B)  cladogenesis
C)  a hybrid zone
D)  anagenesis
E)  sympatric speciation

Question 10

Female fireflies identify males by their flashing patterns, which are often so complicated that signals sent by one species cannot be understood by another species. This reproductive isolating mechanism is called ____.

Accepted Answer

A)  ecological isolation
B)  gametic isolation
C)  temporal isolation
D)  behavioral isolation
E)  mechanical isolation D

Question 11

Sympatric speciation often occurs in animals through polyploidy. ​

Accepted Answer

A) True 
 B)False

Question 12

Which scenario is an example of mechanical reproductive isolation?

Accepted Answer

A)  two plants that bloom months apart
B)  two flowers that are pollinated by different insects
C)  two mammals that have different habitats
D)  two fish that have incompatible gametes
E)  two birds that have different mating rituals B

Question 13

Hybrid organisms frequently die as embryos or at an early age, a phenomenon called hybrid breakdown. ​

Accepted Answer

A) True 
 B)False

Question 14

Polyploidy refers to an individual ____ and occurs most often in ____. ​

Accepted Answer

A)  with one or more additional sets of chromosomes; animals
B)  with one or more additional sets of chromosomes; plants
C)  lacking one or more sets of chromosomes; plants
D)  lacking one or more sets of chromosomes; animals
E)  lacking individual chromosomes; animals

Question 15

With the biological species concept, the process of speciation is frequently defined as the evolution of ____ between populations. ​

Accepted Answer

A)  genetic drift
B)  gene flow
C)  reproductive isolation
D)  geographic separation
E)  reproductive inclusion

Question 16

How did researchers establish the connection between chimpanzees and humans? ​

Accepted Answer

Researchers examined the chromosomes of ...

Question 17

Eggs have receptors that recognize surface proteins on sperm of their own species. This illustrates ____.

Accepted Answer

A)  behavioral isolation
B)  gametic isolation
C)  hybrid breakdown
D)  hybrid inviability
E)  hybrid sterility

Question 18

Polyploid plants are often unhealthy compared to diploid plants. ​

Accepted Answer

A) True 
 B)False

Question 19

Unreduced gametes are those that contain additional chromosome numbers. ​

Accepted Answer

A) True 
 B)False

Question 20

A triploid plant is usually ____ because chromosomes cannot segregate properly during ____.

Accepted Answer

A)  not viable; mitosis
B)  sterile; meiosis
C)  sterile; mitosis
D)  not viable; meiosis
E)  not viable; spore formation

Exam 22: Speciation

Bread wheat (2 n =42) , which is a staple food for about a third of the world's population, evolved from two wheat-like ancestors (both 2 n =42) ; therefore, bread wheat is a ____ organism.

Correct Answer
verified

Match each definition to the correct term.

Match each definition to the correct term.

Match each definition to the correct term.

Postzygotic isolating mechanisms occur when the offspring ____.

Correct Answer
verified

When allopatric populations reestablish contact upon elimination of a geographical barrier, ____ has occurred.

Correct Answer
verified

A plant with a very small tubular type of flower that cannot be pollinated by a large honeybee is exhibiting which prezygotic isolating mechanism?

Correct Answer
verified

An allopolyploid is ____.

Correct Answer
verified

A sterile hybrid plant can form a new fertile species if its chromosomes are doubled. This is referred to as ____.

Correct Answer
verified

Female fireflies identify males by their flashing patterns, which are often so complicated that signals sent by one species cannot be understood by another species. This reproductive isolating mechanism is called ____.

Correct Answer
verified
D

Sympatric speciation often occurs in animals through polyploidy.

Correct Answer
verified

Which scenario is an example of mechanical reproductive isolation?

Correct Answer
verified
B

Hybrid organisms frequently die as embryos or at an early age, a phenomenon called hybrid breakdown.

Correct Answer
verified

Polyploidy refers to an individual and occurs most often in .

Correct Answer
verified

With the biological species concept, the process of speciation is frequently defined as the evolution of ____ between populations.

Correct Answer
verified

How did researchers establish the connection between chimpanzees and humans?

Correct Answer
verified
Researchers examined the chromosomes of ...
View Answer

Eggs have receptors that recognize surface proteins on sperm of their own species. This illustrates ____.

Correct Answer
verified

Polyploid plants are often unhealthy compared to diploid plants.

Correct Answer
verified

Unreduced gametes are those that contain additional chromosome numbers.

Correct Answer
verified

A triploid plant is usually because chromosomes cannot segregate properly during .

Correct Answer
verified

Exam 22: Speciation

Bread wheat (2 n =42) , which is a staple food for about a third of the world's population, evolved from two wheat-like ancestors (both 2 n =42) ; therefore, bread wheat is a ____ organism. ​

Correct AnswerverifiedShow Answer

Match each definition to the correct term.

Match each definition to the correct term.

Match each definition to the correct term.

Postzygotic isolating mechanisms occur when the offspring ____.

Correct AnswerverifiedShow Answer

When allopatric populations reestablish contact upon elimination of a geographical barrier, ____ has occurred. ​

Correct AnswerverifiedShow Answer

A plant with a very small tubular type of flower that cannot be pollinated by a large honeybee is exhibiting which prezygotic isolating mechanism? ​

Correct AnswerverifiedShow Answer

An allopolyploid is ____.

Correct AnswerverifiedShow Answer

A sterile hybrid plant can form a new fertile species if its chromosomes are doubled. This is referred to as ____. ​

Correct AnswerverifiedShow Answer

Female fireflies identify males by their flashing patterns, which are often so complicated that signals sent by one species cannot be understood by another species. This reproductive isolating mechanism is called ____.

Correct AnswerverifiedD

Sympatric speciation often occurs in animals through polyploidy. ​

Correct AnswerverifiedShow Answer

Which scenario is an example of mechanical reproductive isolation?

Correct AnswerverifiedB

Hybrid organisms frequently die as embryos or at an early age, a phenomenon called hybrid breakdown. ​

Correct AnswerverifiedShow Answer

Polyploidy refers to an individual ____ and occurs most often in ____. ​

Correct AnswerverifiedShow Answer

With the biological species concept, the process of speciation is frequently defined as the evolution of ____ between populations. ​

Correct AnswerverifiedShow Answer

How did researchers establish the connection between chimpanzees and humans? ​

Correct AnswerverifiedResearchers examined the chromosomes of ...View AnswerShow Answer

Eggs have receptors that recognize surface proteins on sperm of their own species. This illustrates ____.

Correct AnswerverifiedShow Answer

Polyploid plants are often unhealthy compared to diploid plants. ​

Correct AnswerverifiedShow Answer

Unreduced gametes are those that contain additional chromosome numbers. ​

Correct AnswerverifiedShow Answer

A triploid plant is usually ____ because chromosomes cannot segregate properly during ____.

Correct AnswerverifiedShow Answer

Bread wheat (2 n =42) , which is a staple food for about a third of the world's population, evolved from two wheat-like ancestors (both 2 n =42) ; therefore, bread wheat is a ____ organism.

Correct Answer
verified

Correct Answer
verified

When allopatric populations reestablish contact upon elimination of a geographical barrier, ____ has occurred.

Correct Answer
verified

A plant with a very small tubular type of flower that cannot be pollinated by a large honeybee is exhibiting which prezygotic isolating mechanism?

Correct Answer
verified

Correct Answer
verified

A sterile hybrid plant can form a new fertile species if its chromosomes are doubled. This is referred to as ____.

Correct Answer
verified

Correct Answer
verified
D

Sympatric speciation often occurs in animals through polyploidy.

Correct Answer
verified

Correct Answer
verified
B

Hybrid organisms frequently die as embryos or at an early age, a phenomenon called hybrid breakdown.

Correct Answer
verified

Polyploidy refers to an individual and occurs most often in .

Correct Answer
verified

With the biological species concept, the process of speciation is frequently defined as the evolution of ____ between populations.

Correct Answer
verified

How did researchers establish the connection between chimpanzees and humans?

Correct Answer
verified
Researchers examined the chromosomes of ...
View Answer

Correct Answer
verified

Polyploid plants are often unhealthy compared to diploid plants.

Correct Answer
verified

Unreduced gametes are those that contain additional chromosome numbers.

Correct Answer
verified

A triploid plant is usually because chromosomes cannot segregate properly during .

Correct Answer
verified