Question 1

A(n)________ is a measurable,gradual change over a geographic region in the average value of a trait.

Accepted Answer

cline

Question 2

Traits that have a continuous distribution are known as

Accepted Answer

A) quantitative traits. 
B) qualitative traits. 
C) phenotypic traits. 
D) genotypic traits. 
A) quantitative traits. 
B) qualitative traits. 
C) phenotypic traits. 
D) genotypic traits. A

Question 3

If the physical expression of a heterozygous individual is intermediate between those of the homozygotes,the alleles are ________.

Accepted Answer

codominant

Question 4

An allele that completely masks the effect of another allele is considered

Accepted Answer

A) codominant. 
B) dominant. 
C) ineffective. 
D) recessive. 
A) codominant. 
B) dominant. 
C) ineffective. 
D) recessive.

Question 5

Phenotypic characteristics that have a continuous distribution are considered to be ________ traits.

Accepted Answer

The answer of Phenotypic characteristics that have a continuous distribution...

Question 6

Ecotypes are variants within a species that are adapted to local environmental conditions.

Accepted Answer

A) True 
 B)False

Question 7

Peter and Rosemary Grant are known for their work on

Accepted Answer

A) Tenebrionid beetles. 
B) marine iguanas. 
C) Galápagos tortoises. 
D) Darwin's finches. 
A) Tenebrionid beetles. 
B) marine iguanas. 
C) Galápagos tortoises. 
D) Darwin's finches.

Question 8

Several years of heavy precipitation occur on the Galápagos Islands.What do you predict would happen to the beaks of Darwin's medium ground finches?

Accepted Answer

A) Populations would crash. 
B) Disruptive selection on seed size would occur. 
C) Midparent beak size would decrease. 
D) Offspring beak depth would increase. 
A) Populations would crash. 
B) Disruptive selection on seed size would occur. 
C) Midparent beak size would decrease. 
D) Offspring beak depth would increase.

Question 9

In tiger salamanders one phenotype is cannibalistic while another is not.Both are stable strategies.Which form of selection is best represented by this scenario?

Accepted Answer

A) stabilizing 
B) directional 
C) disruptive 
D) proportional 
A) stabilizing 
B) directional 
C) disruptive 
D) proportional

Question 10

The gene pool refers to all of the genetic information within a

Accepted Answer

A) cell. 
B) individual. 
C) population. 
D) species. 
A) cell. 
B) individual. 
C) population. 
D) species.

Question 11

When genetic variation occurs among subpopulations of the same species,it is known as genetic ________.

Accepted Answer

The answer of When genetic variation occurs among subpopulations of...

Question 12

A(n)________ is any heritable behavioral,morphological,or physiological trait of an organism that has evolved over a period of time by the process of natural selection.

Accepted Answer

The answer of A(n)________ is any heritable behavioral,morphological,or physiological trait...

Question 13

In the Hardy-Weinberg equation P + H + Q = 1,what does "Q" represent?

Accepted Answer

A) total number of individuals in the population 
B) frequency of heterozygotes 
C) frequency of dominant homozygotes 
D) frequency of recessive homozygotes 
A) total number of individuals in the population 
B) frequency of heterozygotes 
C) frequency of dominant homozygotes 
D) frequency of recessive homozygotes

Question 14

Identical twin raccoons are raised in different environments and yet behave very differently.This is an example of

Accepted Answer

A) heterozygous alleles. 
B) the norm of reaction. 
C) genetic differentiation. 
D) acclimation. 
A) heterozygous alleles. 
B) the norm of reaction. 
C) genetic differentiation. 
D) acclimation.

Question 15

Geographic isolates of a particular species that differ from other populations by one or more characteristics are considered to be

Accepted Answer

A) clines. 
B) subspecies. 
C) evolutionary "dead ends." 
D) ecotypes. 
A) clines. 
B) subspecies. 
C) evolutionary "dead ends." 
D) ecotypes.

Question 16

A transgenic organism is one that

Accepted Answer

A) changes gene frequency over time. 
B) provides gene information to another organism. 
C) changes gender over time. 
D) has received genetic information from another organism. 
A) changes gene frequency over time. 
B) provides gene information to another organism. 
C) changes gender over time. 
D) has received genetic information from another organism.

Question 17

If a population has an allele frequency of 1.0,you would say that

Accepted Answer

A) the allele frequency is ideal. 
B) genetic variation of that allele is low. 
C) genetic variation of that allele is high. 
D) that allele is under selection. 
A) the allele frequency is ideal. 
B) genetic variation of that allele is low. 
C) genetic variation of that allele is high. 
D) that allele is under selection.

Question 18

A trait cannot be subject to natural selection unless it is heritable.

Accepted Answer

A) True 
 B)False

Question 19

________ is the mating of individuals in the population that are more closely related than expected by random chance.

Accepted Answer

The answer of ________ is the mating of individuals in...

Question 20

Disruptive selection favors individuals possessing traits near the mean value of a population.

Accepted Answer

A) True 
 B)False

Exam 5: Adaptation and Natural Selection

A(n)________ is a measurable,gradual change over a geographic region in the average value of a trait.

Traits that have a continuous distribution are known as

If the physical expression of a heterozygous individual is intermediate between those of the homozygotes,the alleles are ________.

An allele that completely masks the effect of another allele is considered

Phenotypic characteristics that have a continuous distribution are considered to be ________ traits.

Ecotypes are variants within a species that are adapted to local environmental conditions.

Peter and Rosemary Grant are known for their work on

Several years of heavy precipitation occur on the Galápagos Islands.What do you predict would happen to the beaks of Darwin's medium ground finches?

In tiger salamanders one phenotype is cannibalistic while another is not.Both are stable strategies.Which form of selection is best represented by this scenario?

The gene pool refers to all of the genetic information within a

When genetic variation occurs among subpopulations of the same species,it is known as genetic ________.

A(n)________ is any heritable behavioral,morphological,or physiological trait of an organism that has evolved over a period of time by the process of natural selection.

In the Hardy-Weinberg equation P + H + Q = 1,what does "Q" represent?

Identical twin raccoons are raised in different environments and yet behave very differently.This is an example of

Geographic isolates of a particular species that differ from other populations by one or more characteristics are considered to be

A transgenic organism is one that

If a population has an allele frequency of 1.0,you would say that

A trait cannot be subject to natural selection unless it is heritable.

________ is the mating of individuals in the population that are more closely related than expected by random chance.

Disruptive selection favors individuals possessing traits near the mean value of a population.

The Nature of Ecology

Climate

The Aquatic Environment

The Terrestrial Environment

Plant Adaptations to the Environment

Animal Adaptations to the Environment

Properties of Populations

Population Growth

Life History

Intraspecific Population Regulation

Species Interactions, population Dynamics, and Natural Selection

Interspecific Competition

Predation

Parasitism and Mutualism

Community Structure

Factors Influencing the Structure of Communities

Community Dynamics

Landscape Dynamics

Ecosystem Energetics

Decomposition and Nutrient Cycling

Biogeochemical Cycles

Terrestrial Ecosystems

Aquatic Ecosystems

Coastal and Wetland Ecosystems

Large-Scale Patterns of Biological Diversity

The Ecology of Climate Change

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