Question 1

__________ species of many plants (and a few animals) originated by chromosome doublings and hybridizations.

Accepted Answer

Polyploid

Question 2

Male mallards have had emerald green head feathers and wings with metallic blue patches for hundreds of years, whereas female mallards have been drab, brown-feathered ducks.This phenotypic situation suggests that mallards may be an example of

Accepted Answer

A)  directional selection. 
B)  polyploidy. 
C)  allopatric speciation. 
D)  disruptive selection. 
E)  sexual selection. 
A)  directional selection. 
B)  polyploidy. 
C)  allopatric speciation. 
D)  disruptive selection. 
E)  sexual selection. E

Question 3

The famous "bell-shaped curve" that usually results when test scores are plotted against number of students is an example of what type of selection?

Accepted Answer

A)  disruptive 
B)  stabilizing 
C)  divergent 
D)  variable 
E)  directional 
A)  disruptive 
B)  stabilizing 
C)  divergent 
D)  variable 
E)  directional B

Question 4

__________ counters the effects of mutation, natural selection, and genetic drift.

Accepted Answer

The answer of __________ counters the effects of mutation, natural...

Question 5

Of the following, which does NOT characterize a population in genetic equilibrium?

Accepted Answer

A)  large population size 
B)  no mutation 
C)  differential reproduction 
D)  absence of gene flow 
E)  random mating 
A)  large population size 
B)  no mutation 
C)  differential reproduction 
D)  absence of gene flow 
E)  random mating

Question 6

The situation in which an embryo produced as a result of a mating between individuals of different species is incompatible with the mother and is subsequently aborted is an example of

Accepted Answer

A)  temporal isolation. 
B)  hybrid inviability. 
C)  mechanical isolation. 
D)  gametic mortality. 
E)  behavioral isolation. 
A)  temporal isolation. 
B)  hybrid inviability. 
C)  mechanical isolation. 
D)  gametic mortality. 
E)  behavioral isolation.

Question 7

MATCHING
Matching.Choose the most appropriate letter for each.
a.a reference point that implies stability of gene frequencies through generations
b.encompasses all of those actually or potentially interbreeding populations that are reproductively isolated from other such groups
c.the genes of an entire population
d.the frequency of homozygous dominants in a population
e.the frequencies of dominant and recessive alleles in a population
f.the frequency of heterozygotes in a population
g.the frequency of homozygous recessives in a population
h.heterozygote advantage in regions where malaria is found
i.pesticide-resistant pests
-p2
46.2pq

Accepted Answer

Question 8

Which is NOT true about gene mutations?

Accepted Answer

A)  All are transmitted to the next generation. 
B)  They are rare but their rates can be predicted. 
C)  Those with beneficial effects will be favored by natural selection. 
D)  Many reduce an individual's chance of surviving and reproducing. 
E)  Those with neutral effects neither help nor hurt the individual. 
A)  All are transmitted to the next generation. 
B)  They are rare but their rates can be predicted. 
C)  Those with beneficial effects will be favored by natural selection. 
D)  Many reduce an individual's chance of surviving and reproducing. 
E)  Those with neutral effects neither help nor hurt the individual.

Question 9

Classification.For the following statements select the best choice of the four evolutionary processes listed below.
a.mutation
b.gene flow
c.genetic drift
d.natural selection
-This is most likely to lead to the loss of genetic variation in a small population.

Accepted Answer

The answer of Classification.For the following statements select the best...

Question 10

In __________ speciation, a geographic barrier interrupts gene flow between populations.

Accepted Answer

The answer of In __________ speciation, a geographic barrier interrupts...

Question 11

Deviations from __________ indicate that a population is evolving.

Accepted Answer

The answer of Deviations from __________ indicate that a population...

Question 12

__________ selection favors intermediate forms of a trait whereas __________ selection favors extreme forms.

Accepted Answer

Stabilizin

Question 13

Reproductive isolating mechanisms typically evolve after gene flow __________.

Accepted Answer

The answer of Reproductive isolating mechanisms typically evolve after gene...

Question 14

Microevolution is change in the __________ of a population.

Accepted Answer

The answer of Microevolution is change in the __________ of...

Question 15

An extant organism is found to be almost unchanged from its 200 million year old fossil.This is an example of:

Accepted Answer

A)  stasis. 
B)  coevolution. 
C)  mass extinction. 
D)  adaptive radiation. 
E)  none of these. 
A)  stasis. 
B)  coevolution. 
C)  mass extinction. 
D)  adaptive radiation. 
E)  none of these.

Question 16

Directional Selection
-As the trees in England become less sooty due to pollution controls on factories, which of the moths in the figure above would have been selected against?

Accepted Answer

A)  A 
B)  B 
C)  C 
D)  D 
E)  all of these 
A)  A 
B)  B 
C)  C 
D)  D 
E)  all of these

Question 17

-If this population of butterflies is in genetic equilibrium, the frequency of the homozygous dominant genotype in the new generation will be

Accepted Answer

A)  p2. 
B)  2pq. 
C)  p2 + q2. 
D)  490 AA. 
E)  p2 and 490 AA. 
A)  p2. 
B)  2pq. 
C)  p2 + q2. 
D)  490 AA. 
E)  p2 and 490 AA.

Question 18

The sharp reduction of the gene pool and the numbers of a population through a severe epidemic is an example of

Accepted Answer

A)  natural selection. 
B)  genetic isolation. 
C)  the bottleneck effect. 
D)  the founder effect. 
E)  all of these. 
A)  natural selection. 
B)  genetic isolation. 
C)  the bottleneck effect. 
D)  the founder effect. 
E)  all of these.

Question 19

__________ selection leads to forms of traits that enhance reproductive success and may result in sexual dimorphism.

Accepted Answer

The answer of __________ selection leads to forms of traits...

Question 20

Speciation caused by a change in the course of a river is an example of ____ speciation.

Accepted Answer

A)  divergent 
B)  parapatric 
C)  allopatric 
D)  convergent 
E)  sympatric 
A)  divergent 
B)  parapatric 
C)  allopatric 
D)  convergent 
E)  sympatric

Exam 17: Processes of Evolution

__________ species of many plants (and a few animals) originated by chromosome doublings and hybridizations.

Male mallards have had emerald green head feathers and wings with metallic blue patches for hundreds of years, whereas female mallards have been drab, brown-feathered ducks.This phenotypic situation suggests that mallards may be an example of

The famous "bell-shaped curve" that usually results when test scores are plotted against number of students is an example of what type of selection?

__________ counters the effects of mutation, natural selection, and genetic drift.

Of the following, which does NOT characterize a population in genetic equilibrium?

The situation in which an embryo produced as a result of a mating between individuals of different species is incompatible with the mother and is subsequently aborted is an example of

Which is NOT true about gene mutations?

Classification.For the following statements select the best choice of the four evolutionary processes listed below. a.mutation b.gene flow c.genetic drift d.natural selection -This is most likely to lead to the loss of genetic variation in a small population.

In __________ speciation, a geographic barrier interrupts gene flow between populations.

Deviations from __________ indicate that a population is evolving.

__________ selection favors intermediate forms of a trait whereas __________ selection favors extreme forms.

Reproductive isolating mechanisms typically evolve after gene flow __________.

Microevolution is change in the __________ of a population.

An extant organism is found to be almost unchanged from its 200 million year old fossil.This is an example of:

Directional Selection -As the trees in England become less sooty due to pollution controls on factories, which of the moths in the figure above would have been selected against?

-If this population of butterflies is in genetic equilibrium, the frequency of the homozygous dominant genotype in the new generation will be

The sharp reduction of the gene pool and the numbers of a population through a severe epidemic is an example of

__________ selection leads to forms of traits that enhance reproductive success and may result in sexual dimorphism.

Speciation caused by a change in the course of a river is an example of ____ speciation.

Invitation to Biology

Lifes Chemical Basis

Molecules of Life

Cell Structure and Function

Ground Rules of Metabolism

Where It Startsphotosynthesis

How Cells Release Chemical Energy

Dna Structure and Function

From Dna to Protein

Gene Control

How Cells Reproduce

Meiosis and Sexual Reproduction

Observing Patterns in Inherited Traits

Chromosomes and Human Inheritance

Studying and Manipulating Genomes

Evidence of Evolution

Organizing Information About Species

Lifes Origin and Early Evolution

Viruses and Prokaryotes

Protiststhe Simplest Eukaryotes

The Land Plants

Fungi

Animal Evolutionthe Invertebrates

Animal Evolutionthe Chordates

Animal Evolutionhuman Evolution

Plant Tissues

Plant Nutrition and Transport

Life Cycles of Flowering Plants

Communication Strategies in Plants

Animal Tissues and Organ Systems

Neural Control

Sensory Perception

Endocrine Control

Structural Support and Movement

Circulation

Immunity

Respiration

Digestion and Nutrition

Maintaining the Internal Environment

Animal Reproductive Systems

Animal Development

Animal Behavior

Population Ecology

Community Ecology

Ecosystems

The Biosphere

Human Impacts on the Biosphere

Filters

selection favors intermediate forms of a trait whereas selection favors extreme forms.