Question 1

In humans,structures that show developmental homology with other chordates are

Accepted Answer

A)  the eyes and nostrils.
B)  gill ridges and a bony tail.
C)  fore and hindlimbs.
D)  the lungs and vertebrae.E) B) and C)
F) A) and C)

Question 2

After his journey on the HMS Beagle,Charles Darwin bred pigeons,selectively mating those with particular characteristics in a process he termed artificial selection.The results of this artificial selection influenced and supported the ideas he presented in On the Origin of Species.What scientific tool(s) did Darwin use to develop his theory of evolution?

Accepted Answer

A)  Experimentation.
B)  Observation.
C)  Both experimentation and observation.
D)  Population genetics.
E)  Both observation and population genetics.F) C) and D)
G) B) and C)

Question 3

In a small population,both _________ and __________ would violate the conditions of Hardy-Weinberg equilibrium.

Accepted Answer

A)  random mating;genetic drift
B)  gene flow,random mating
C)  lack of natural selection,gene flow
D)  sexual selection,lack of new mutations
E)  gene flow,genetic driftF) A) and D)
G) All of the above

Question 4

According to Thomas Malthus,food supplies tend to increase linearly while populations have the potential to increase exponentially,which means that resources will limit population growth.

Accepted Answer

A) True 
 B)False

Question 5

You visit a pet store and decide to purchase a male guppy that has red,blue and green colors on its fins and tail.Your guppies at home do not have this combination of colors and you would like to own some that do.You place the new male in with three females for mating purposes.After three weeks you have many new baby guppies and with the new color combination! This is an example of which type of selection?

Accepted Answer

A)  Natural.
B)  Environmental.
C)  Analogous.
D)  Convergent.
E)  Artificial.F) B) and C)
G) A) and E)

Question 6

Fitness is a measure of reproductive success.If an individual with genotype BB produces 6 offspring,and a heterozygous individual (Bb) produces 10 offspring,and a third individual with genotype bb produces 5 offspring,what is the fitness value for the individual with BB genotype?

Accepted Answer

A)  1.0.
B)  0.5.
C)  0.6.
D)  0.4.
E)  1.1F) B) and E)
G) A) and E)

Question 7

A coral species that currently inhabits a single reef off the coast of Indonesia would be considered:

Accepted Answer

A)  vestigial.
B)  a transitional form.
C)  endemiC.
D)  exotic.
E)  a convergent species.F) A) and D)
G) A) and E)

Question 8

Peter and Rosemary Grant study natural selection in finches on the Galápagos Islands.They have hypothesized that dry conditions produce larger seeds and may result in larger beaks in succeeding generations of finches.The figure below shows their data from 1976 and 1978.The y-axis is the number of birds measured and the x-axis is the beak depth.Do their data support their hypothesis and why?

Accepted Answer

A)  Yes;because there were more birds measured in 1978 after the drought,therefore they must have been able to get food and reproduce.
B)  Yes;because the average beak depth of birds in the population increased from 8.8mm in 1976 to 9.8mm in 1978.
C)  No;because even though more birds were measured in 1978,the beak size of the upper range was smaller.
D)  No;because in 1976,before the drought,the largest beak depth was still 11.3mm.
E)  No;more data would be necessary to show a support of their hypothesis.F) A) and E)
G) A) and C)

Question 9

The effect of inbreeding is

Accepted Answer

A)  a decrease of homozygotes in succeeding generations.
B)  a decrease of heterozygotes in succeeding generations.
C)  stable frequencies of genotypes in succeeding generations.
D)  eventual elimination of deleterious recessive alleles.E) A) and C)
F) B) and D)

Question 10

In red-wing blackbirds,females tend to choose males with the most desirable territories and males compete with each other for territories.
True or false: Redwing blackbirds demonstrate both intersexual selection and intrasexual selection.

Accepted Answer

A) True 
 B)False

Question 11

During the Beagle journey,Darwin visited islands,allowing him to compare island species with continental species.In terms of framing his theory of evolution,why was this significant?

Accepted Answer

A)  Because the island species had both similarities to their continental ancestors and unique adaptations to their island environments.
B)  Because the island species no longer shared traits with their continental ancestors.
C)  Because the species he saw on the islands had not changed from their ancestral continental form.
D)  Because the island species had very low reproductive and survival rates as compared with their continental ancestors.
E)  Because the island species had greater reproductive success than their continental ancestors.F) A) and E)
G) None of the above

Question 12

If a population satisfies the Hardy-Weinberg equilibrium model,what can you assume about that population?

Accepted Answer

A)  It is relatively small.
B)  Evolution is occurring.
C)  Gene flow is occurring.
D)  Allele and genotype frequencies are stable.E) All of the above
F) A) and D)

Question 13

What phenomena tends to increase genetic variation in a population?

Accepted Answer

A)  Gene flow
B)  Population bottleneck
C)  Assortative mating
D)  Genetic drift
E)  Founder effectF) C) and D)
G) B) and E)

Question 14

The most important concept in the field of population genetics is

Accepted Answer

A)  natural selection.
B)  population size.
C)  rates of mutation.
D)  genetic variation.
E)  phenotypic variation.F) A) and B)
G) None of the above

Question 15

Which of the following is NOT related to genetic drift?

Accepted Answer

A)  Founder effect
B)  Bottleneck effect
C)  Sexual selection
D)  Neutral variationE) A) and D)
F) A) and B)

Question 16

When observing the skeleton of a snake,you see the remains of hip and hind leg bones associated with four legged animals.These bones are called

Accepted Answer

A)  convergent traits.
B)  analogous structures.
C)  vestigial structures.
D)  homologous structures.
E)  allelic traits.F) All of the above
G) A) and B)

Question 17

A mutation arises in an individual that decreases its fitness.This means that this individual's

Accepted Answer

A)  probability of survival will decrease.
B)  ability to find food will decrease.
C)  ability to migrate long distances will decrease.
D)  contribution to the gene pool of the next generation will decrease.
E)  likelihood of having healthy offspring will increasE.F) None of the above
G) D) and E)

Question 18

When humans are developing in utero they have characteristics that are not found in the fully developed infant.Which type of homology does this typify?

Accepted Answer

A)  Developmental.
B)  Structural.
C)  Vestigal.
D)  Molecular.
E)  Endemic.F) None of the above
G) All of the above

Question 19

The term evolution is used to describe

Accepted Answer

A)  heritable changes in characteristics of a population from one generation to the next.
B)  any change in an individual that can be observed.
C)  changes in the number of individuals in a population due to mating.
D)  the ability of an individual organism to pass on what it has learned,through experience,to the next generation.
E)  any change in an individual organism that occurs in somatic cells.F) A) and D)
G) B) and C)

Question 20

Some major changes that occurred in horse body size,foot anatomy,and tooth morphology are hypothesized to be due to natural selection because

Accepted Answer

A)  changes in global climates resulted in a shift from forest to grassland environments.
B)  changes in global climates resulted in a shift from from grassland to forest environments.
C)  decreasing body size led to higher reproductive success.
D)  changing climates that caused altitudinal shifts in forest environments.
E)  a mass extinction of their major predators.F) A) and B)
G) None of the above

Exam 19: An Introduction to Evolution and Population Genetics

The most important concept in the field of population genetics is

Correct Answer
verified

According to Thomas Malthus,food supplies tend to increase linearly while populations have the potential to increase exponentially,which means that resources will limit population growth.

Correct Answer
verified

When observing the skeleton of a snake,you see the remains of hip and hind leg bones associated with four legged animals.These bones are called

Correct Answer
verified

If a population satisfies the Hardy-Weinberg equilibrium model,what can you assume about that population?

Correct Answer
verified

The effect of inbreeding is

Correct Answer
verified

In humans,structures that show developmental homology with other chordates are

Correct Answer
verified

In red-wing blackbirds,females tend to choose males with the most desirable territories and males compete with each other for territories. True or false: Redwing blackbirds demonstrate both intersexual selection and intrasexual selection.

Correct Answer
verified

The term evolution is used to describe

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

A mutation arises in an individual that decreases its fitness.This means that this individual's

Correct Answer
verified

Some major changes that occurred in horse body size,foot anatomy,and tooth morphology are hypothesized to be due to natural selection because

Correct Answer
verified

When humans are developing in utero they have characteristics that are not found in the fully developed infant.Which type of homology does this typify?

Correct Answer
verified

Correct Answer
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What phenomena tends to increase genetic variation in a population?

Correct Answer
verified

Fitness is a measure of reproductive success.If an individual with genotype BB produces 6 offspring,and a heterozygous individual (Bb) produces 10 offspring,and a third individual with genotype bb produces 5 offspring,what is the fitness value for the individual with BB genotype?

Correct Answer
verified

A coral species that currently inhabits a single reef off the coast of Indonesia would be considered:

Correct Answer
verified

During the Beagle journey,Darwin visited islands,allowing him to compare island species with continental species.In terms of framing his theory of evolution,why was this significant?

Correct Answer
verified

Which of the following is NOT related to genetic drift?

Correct Answer
verified

In a small population,both _ and __ would violate the conditions of Hardy-Weinberg equilibrium.

Correct Answer
verified

Exam 19: An Introduction to Evolution and Population Genetics

The most important concept in the field of population genetics is

Correct AnswerverifiedShow Answer

According to Thomas Malthus,food supplies tend to increase linearly while populations have the potential to increase exponentially,which means that resources will limit population growth.

Correct AnswerverifiedShow Answer

When observing the skeleton of a snake,you see the remains of hip and hind leg bones associated with four legged animals.These bones are called

Correct AnswerverifiedShow Answer

If a population satisfies the Hardy-Weinberg equilibrium model,what can you assume about that population?

Correct AnswerverifiedShow Answer

The effect of inbreeding is

Correct AnswerverifiedShow Answer

In humans,structures that show developmental homology with other chordates are

Correct AnswerverifiedShow Answer

In red-wing blackbirds,females tend to choose males with the most desirable territories and males compete with each other for territories. True or false: Redwing blackbirds demonstrate both intersexual selection and intrasexual selection.

Correct AnswerverifiedShow Answer

The term evolution is used to describe

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

A mutation arises in an individual that decreases its fitness.This means that this individual's

Correct AnswerverifiedShow Answer

Some major changes that occurred in horse body size,foot anatomy,and tooth morphology are hypothesized to be due to natural selection because

Correct AnswerverifiedShow Answer

When humans are developing in utero they have characteristics that are not found in the fully developed infant.Which type of homology does this typify?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

What phenomena tends to increase genetic variation in a population?

Correct AnswerverifiedShow Answer

Fitness is a measure of reproductive success.If an individual with genotype BB produces 6 offspring,and a heterozygous individual (Bb) produces 10 offspring,and a third individual with genotype bb produces 5 offspring,what is the fitness value for the individual with BB genotype?

Correct AnswerverifiedShow Answer

A coral species that currently inhabits a single reef off the coast of Indonesia would be considered:

Correct AnswerverifiedShow Answer

During the Beagle journey,Darwin visited islands,allowing him to compare island species with continental species.In terms of framing his theory of evolution,why was this significant?

Correct AnswerverifiedShow Answer

Which of the following is NOT related to genetic drift?

Correct AnswerverifiedShow Answer

In a small population,both _________ and __________ would violate the conditions of Hardy-Weinberg equilibrium.

Correct AnswerverifiedShow Answer

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In a small population,both _ and __ would violate the conditions of Hardy-Weinberg equilibrium.

Correct Answer
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