Question 1

Species like the African cheetah,northern elephant seal,and Florida panther have all experienced a genetic bottleneck; what is the primary outcome of this experience?

Accepted Answer

A)  Genetic mutation occurs at a higher frequency. 
B)  New genetic material arrives from individuals that join the population. 
C)  Natural selection becomes disruptive. 
D)  Genetic diversity is greatly reduced. 
A)  Genetic mutation occurs at a higher frequency. 
B)  New genetic material arrives from individuals that join the population. 
C)  Natural selection becomes disruptive. 
D)  Genetic diversity is greatly reduced.

Question 2

It is quite common for species that are exposed to sexual selection to be sexually dimorphic.What best explains why the males of diverse species like the lion,elephant seal,and elk are so much larger than the females?

Accepted Answer

A)  In these populations, the males fight one another for the privilege of breeding; therefore, larger males are more likely to be successful. 
B)  Only large, robust males survive long enough to reach the age of sexual maturity. 
C)  Large males are better able to defend their offspring; therefore, they make better mates. 
D)  Large males have superior predator avoidance skills; therefore, they make better mates. 
A)  In these populations, the males fight one another for the privilege of breeding; therefore, larger males are more likely to be successful. 
B)  Only large, robust males survive long enough to reach the age of sexual maturity. 
C)  Large males are better able to defend their offspring; therefore, they make better mates. 
D)  Large males have superior predator avoidance skills; therefore, they make better mates.

Question 3

The protein sequences and DNA sequences of organisms that share a recent common ancestor are likely to be ________ similar than those of organisms that do not share a recent common ancestor.

Accepted Answer

The answer of The protein sequences and DNA sequences of...

Question 4

A hurricane could cause genetic drift by

Accepted Answer

A)  increasing the mutation rate of a population. 
B)  randomly killing more males than females in a population. 
C)  randomly killing more individuals of one genotype than another in a population. 
D)  relocating a population to a different habitat. 
A)  increasing the mutation rate of a population. 
B)  randomly killing more males than females in a population. 
C)  randomly killing more individuals of one genotype than another in a population. 
D)  relocating a population to a different habitat.

Question 5

Which of the following statements about evolution is true?

Accepted Answer

A)  It results only in the addition of traits to organisms. 
B)  It results only in the loss of traits from organisms. 
C)  It can result in the addition or loss of traits in organisms. 
D)  It has nothing to do with the addition or loss of traits. 
A)  It results only in the addition of traits to organisms. 
B)  It results only in the loss of traits from organisms. 
C)  It can result in the addition or loss of traits in organisms. 
D)  It has nothing to do with the addition or loss of traits.

Question 6

Which of the following statements about the fossil record is true?

Accepted Answer

A)  It indicates that representatives of all known plant and animal groups originated on Earth at approximately the same time. 
B)  It contains strong evidence that major new groups of plants and animals were the descendants of previously existing organisms. 
C)  It indicates that humans date back as far as the first indications of life. 
D)  It is incomplete, disjointed, often contradictory, and generally uninterruptible with regard to the evolutionary history of life on Earth. 
A)  It indicates that representatives of all known plant and animal groups originated on Earth at approximately the same time. 
B)  It contains strong evidence that major new groups of plants and animals were the descendants of previously existing organisms. 
C)  It indicates that humans date back as far as the first indications of life. 
D)  It is incomplete, disjointed, often contradictory, and generally uninterruptible with regard to the evolutionary history of life on Earth.

Question 7

Peppered moths in England evolved into a dark-colored form when soot darkened the bark of the trees they lived on and exposed the light-colored form to predation.However,air pollution control eventually restored the moths' habitat to its original condition.What would probably have happened to the peppered moth population if the light-colored alleles had been entirely lost from its gene pool during the period when dark-colored moths were selectively favored?

Accepted Answer

A)  Mutations that would reestablish the light-colored allele in the gene pool would have occurred. 
B)  The moths would have evolved behaviorally and chosen to avoid trees with light-colored bark. 
C)  The moths would have changed their dietary preferences to foods that contain only light pigments. 
D)  The population would have become extremely small or possibly extinct after the loss of this adaptive trait. 
A)  Mutations that would reestablish the light-colored allele in the gene pool would have occurred. 
B)  The moths would have evolved behaviorally and chosen to avoid trees with light-colored bark. 
C)  The moths would have changed their dietary preferences to foods that contain only light pigments. 
D)  The population would have become extremely small or possibly extinct after the loss of this adaptive trait.

Question 8

Genetic variation within a population is the result of the expression of the different ________ of a gene.

Accepted Answer

The answer of Genetic variation within a population is the...

Question 9

The fact that small,nonfunctioning hind legs are found in the skeletons of many snakes suggests that snakes

Accepted Answer

A)  are in the process of evolving legs. 
B)  evolved from organisms with legs. 
C)  are really populations of lizards with one or more severe mutations in limb development. 
D)  evolved from eels (snakelike fishes). 
A)  are in the process of evolving legs. 
B)  evolved from organisms with legs. 
C)  are really populations of lizards with one or more severe mutations in limb development. 
D)  evolved from eels (snakelike fishes).

Question 10

Which of the following agricultural practices is supported by our current knowledge of the evolutionary process?

Accepted Answer

A)  applying fertilizers and irrigation to newly established crops 
B)  periodically fallowing a field to give it time for nutrient accumulation 
C)  using a large variety of pest control methods on a rotating basis to retard the development of pesticide resistance 
D)  reducing a crop's genetic diversity, such as maturation or grain size, so that it becomes more uniform and easier to harvest and process 
A)  applying fertilizers and irrigation to newly established crops 
B)  periodically fallowing a field to give it time for nutrient accumulation 
C)  using a large variety of pest control methods on a rotating basis to retard the development of pesticide resistance 
D)  reducing a crop's genetic diversity, such as maturation or grain size, so that it becomes more uniform and easier to harvest and process

Question 11

The most probable explanation for why two different species have similar features is

Accepted Answer

A)  genetic drift. 
B)  gene flow. 
C)  artificial selection. 
D)  descent from a common ancestor. 
A)  genetic drift. 
B)  gene flow. 
C)  artificial selection. 
D)  descent from a common ancestor.

Question 12

Many weeds have become resistant to the herbicides that were once used to control them.Which of the following statements best explains this observation?

Accepted Answer

A)  The weeds have evolved to become different species. 
B)  The herbicides have evolved and are no longer effective against the weeds. 
C)  Continental drift has caused the evolution of weed resistance in the herbicides. 
D)  Natural selection has acted on the genetic variability in the weeds' genomes, enabling plants that have herbicide resistance to reproduce more successfully. 
A)  The weeds have evolved to become different species. 
B)  The herbicides have evolved and are no longer effective against the weeds. 
C)  Continental drift has caused the evolution of weed resistance in the herbicides. 
D)  Natural selection has acted on the genetic variability in the weeds' genomes, enabling plants that have herbicide resistance to reproduce more successfully.

Species like the African cheetah,northern elephant seal,and Florida panther have all experienced a genetic bottleneck; what is the primary outcome of this experience?

It is quite common for species that are exposed to sexual selection to be sexually dimorphic.What best explains why the males of diverse species like the lion,elephant seal,and elk are so much larger than the females?

The protein sequences and DNA sequences of organisms that share a recent common ancestor are likely to be ________ similar than those of organisms that do not share a recent common ancestor.

A hurricane could cause genetic drift by

Which of the following statements about evolution is true?

Which of the following statements about the fossil record is true?

Genetic variation within a population is the result of the expression of the different ________ of a gene.

The fact that small,nonfunctioning hind legs are found in the skeletons of many snakes suggests that snakes

Which of the following agricultural practices is supported by our current knowledge of the evolutionary process?

The most probable explanation for why two different species have similar features is

Many weeds have become resistant to the herbicides that were once used to control them.Which of the following statements best explains this observation?

The Nature of Science and the Characteristics of Life

The Chemistry of Life

Cell Structure and Internal Compartments

Cell Membranes, Transport, and Communication

Energy, Metabolism, and Enzymes

Photo Synthesis and Cellular Respiration

Cell Division

Cancer and Human Health

Patterns of Inheritance

Chromosomes and Human Genetics

DNA and Genes

From Gene to Protein

DNA Technology

The Origin of Species

The Evolution of Biodiversity

Biological Diversity, Bacteria, and Archaea

Protista, Plantae, and Fungi

Animalia

The Biosphere

Growth of Populations

Animal Behavior

Ecological Communities

Ecosystems

Global Change

Filters

Exam 14: How Evolution Works

Species like the African cheetah,northern elephant seal,and Florida panther have all experienced a genetic bottleneck; what is the primary outcome of this experience?

It is quite common for species that are exposed to sexual selection to be sexually dimorphic.What best explains why the males of diverse species like the lion,elephant seal,and elk are so much larger than the females?

The protein sequences and DNA sequences of organisms that share a recent common ancestor are likely to be ________ similar than those of organisms that do not share a recent common ancestor.

A hurricane could cause genetic drift by

Which of the following statements about evolution is true?

Which of the following statements about the fossil record is true?

Genetic variation within a population is the result of the expression of the different ________ of a gene.

The fact that small,nonfunctioning hind legs are found in the skeletons of many snakes suggests that snakes

Which of the following agricultural practices is supported by our current knowledge of the evolutionary process?

The most probable explanation for why two different species have similar features is

Many weeds have become resistant to the herbicides that were once used to control them.Which of the following statements best explains this observation?

The Nature of Science and the Characteristics of Life

The Chemistry of Life

Cell Structure and Internal Compartments

Cell Membranes, Transport, and Communication

Energy, Metabolism, and Enzymes

Photo Synthesis and Cellular Respiration

Cell Division

Cancer and Human Health

Patterns of Inheritance

Chromosomes and Human Genetics

DNA and Genes

From Gene to Protein

DNA Technology

The Origin of Species

The Evolution of Biodiversity

Biological Diversity, Bacteria, and Archaea

Protista, Plantae, and Fungi

Animalia

The Biosphere

Growth of Populations

Animal Behavior

Ecological Communities

Ecosystems

Global Change

Filters