Question 1

Which pair of evolutionary processes can introduce new alleles into a population?

Accepted Answer

A)  Mutation and genetic drift 
B)  Genetic drift and recombination 
C)  Disruptive selection and gene flow 
D)  Gene flow and mutation 
A)  Mutation and genetic drift 
B)  Genetic drift and recombination 
C)  Disruptive selection and gene flow 
D)  Gene flow and mutation

Question 2

Tall people generally have tall parents, and short people tend to have short parents. Based on this observation, we can infer that height is

Accepted Answer

A)  evolving in the human population. 
B)  due to a single gene. 
C)  a heritable trait. 
D)  not a genetically-based trait. 
A)  evolving in the human population. 
B)  due to a single gene. 
C)  a heritable trait. 
D)  not a genetically-based trait.

Question 3

Which statement about adaptive evolution is true?

Accepted Answer

A)  Gene flow can limit local adaptation. 
B)  Adaptive evolution almost always requires hundreds of years or more to be noticeable. 
C)  The presence of genetic variation makes adaptive evolution more unlikely to occur. 
D)  Adaptive evolution occurs within an individual and changes are then passed genetically to offspring. 
A)  Gene flow can limit local adaptation. 
B)  Adaptive evolution almost always requires hundreds of years or more to be noticeable. 
C)  The presence of genetic variation makes adaptive evolution more unlikely to occur. 
D)  Adaptive evolution occurs within an individual and changes are then passed genetically to offspring.

Question 4

If a population of monkeyflowers has 500 members with 135 of genotype DD, 280 of genotype Dd, and 85 of genotype dd, what is the frequency of the D allele?

Accepted Answer

A)  0.275 
B)  0.415 
C)  0.45 
D)  0.55 
A)  0.275 
B)  0.415 
C)  0.45 
D)  0.55

Question 5

Suppose the size of a bird's beak influences how difficult it is for the bird to eat differently sized seeds. If a larger beak improves the ability of the bird to eat large seeds, but it decreases its ability to eat smaller seeds. This is an example of

Accepted Answer

A)  maladaptive radiation. 
B)  disruptive selection. 
C)  an ecological trade-off. 
D)  genetic drift. 
A)  maladaptive radiation. 
B)  disruptive selection. 
C)  an ecological trade-off. 
D)  genetic drift.

Question 6

As a habitat becomes fragmented, the population sizes of a species in the habitat should _______, effects of genetic drift should _______, and genetic variation within populations of this species should _______.

Accepted Answer

A)  increase; increase; increase 
B)  increase; increase; decrease 
C)  decrease; increase; decrease 
D)  decrease; decrease; increase 
A)  increase; increase; increase 
B)  increase; increase; decrease 
C)  decrease; increase; decrease 
D)  decrease; decrease; increase

Question 7

Which process can produce new combinations of alleles in a population?

Accepted Answer

A)  Directional selection 
B)  Stabilizing selection 
C)  Genetic drift 
D)  Recombination 
A)  Directional selection 
B)  Stabilizing selection 
C)  Genetic drift 
D)  Recombination

Question 8

Trophy hunting in bighorn sheep has had an inadvertent evolutionary consequence: the sheep have become _______ and their horns have become _______.

Accepted Answer

A)  larger; larger 
B)  larger; smaller 
C)  smaller; larger 
D)  smaller; smaller 
A)  larger; larger 
B)  larger; smaller 
C)  smaller; larger 
D)  smaller; smaller

Which pair of evolutionary processes can introduce new alleles into a population?

Tall people generally have tall parents, and short people tend to have short parents. Based on this observation, we can infer that height is

Which statement about adaptive evolution is true?

If a population of monkeyflowers has 500 members with 135 of genotype DD, 280 of genotype Dd, and 85 of genotype dd, what is the frequency of the D allele?

Suppose the size of a bird's beak influences how difficult it is for the bird to eat differently sized seeds. If a larger beak improves the ability of the bird to eat large seeds, but it decreases its ability to eat smaller seeds. This is an example of

As a habitat becomes fragmented, the population sizes of a species in the habitat should ___, effects of genetic drift should _, and genetic variation within populations of this species should _____.

Which process can produce new combinations of alleles in a population?

Trophy hunting in bighorn sheep has had an inadvertent evolutionary consequence: the sheep have become _ and their horns have become _.

The Web of Life

The Physical Environment

The Biosphere

Coping With Environmental Variation:

Coping With Environmental Variation: Energy

Life History

Behavioral Ecology

Population Distribution and Abundance

Population Dynamics

Population Growth and Regulation

Predation

Parasitism

Competition

Mutualism and Commensalism

The Nature of Communities

Change in Communities

Biogeography

Species Diversity in Communities

Production

Energy Flow and Food Webs

Nutrient Supply and Cycling

Conservation Biology

Landscape Ecology and Ecosystem Management

Global Ecology

Filters

Exam 6: Evolution and Ecology

Which pair of evolutionary processes can introduce new alleles into a population?

Tall people generally have tall parents, and short people tend to have short parents. Based on this observation, we can infer that height is

Which statement about adaptive evolution is true?

If a population of monkeyflowers has 500 members with 135 of genotype DD, 280 of genotype Dd, and 85 of genotype dd, what is the frequency of the D allele?

Suppose the size of a bird's beak influences how difficult it is for the bird to eat differently sized seeds. If a larger beak improves the ability of the bird to eat large seeds, but it decreases its ability to eat smaller seeds. This is an example of

As a habitat becomes fragmented, the population sizes of a species in the habitat should _______, effects of genetic drift should _______, and genetic variation within populations of this species should _______.

Which process can produce new combinations of alleles in a population?

Trophy hunting in bighorn sheep has had an inadvertent evolutionary consequence: the sheep have become _______ and their horns have become _______.

The Web of Life

The Physical Environment

The Biosphere

Coping With Environmental Variation:

Coping With Environmental Variation: Energy

Life History

Behavioral Ecology

Population Distribution and Abundance

Population Dynamics

Population Growth and Regulation

Predation

Parasitism

Competition

Mutualism and Commensalism

The Nature of Communities

Change in Communities

Biogeography

Species Diversity in Communities

Production

Energy Flow and Food Webs

Nutrient Supply and Cycling

Conservation Biology

Landscape Ecology and Ecosystem Management

Global Ecology

Filters

As a habitat becomes fragmented, the population sizes of a species in the habitat should ___, effects of genetic drift should _, and genetic variation within populations of this species should _____.

Trophy hunting in bighorn sheep has had an inadvertent evolutionary consequence: the sheep have become _ and their horns have become _.