Question 1

Refer to the figure below, and then answer the question that follows.
  
-Human birth weights are an example of:

Accepted Answer

A) disruptive selection. 
B) stabilizing selection. 
C) directional selection. 
D) sexual selection. 
A) disruptive selection. 
B) stabilizing selection. 
C) directional selection. 
D) sexual selection. B

Question 2

The formation of new species over many generations is an example of:

Accepted Answer

A) microevolution. 
B) macroevolution. 
C) gene pools. 
D) allelic variants. 
A) microevolution. 
B) macroevolution. 
C) gene pools. 
D) allelic variants. B

Question 3

The mate-attracting elaborate plumage of the male peacock is a result of:

Accepted Answer

A) genetic drift. 
B) adaptation to the environment. 
C) sexual selection. 
D) gene flow. 
A) genetic drift. 
B) adaptation to the environment. 
C) sexual selection. 
D) gene flow. C

Question 4

At its most basic level,evolution is a:

Accepted Answer

A) change in the frequency of alleles in a population. 
B) change in the frequency of alleles in an individual. 
C) new species arising from an existing species. 
D) change in an individual's phenotype caused by mutations. 
A) change in the frequency of alleles in a population. 
B) change in the frequency of alleles in an individual. 
C) new species arising from an existing species. 
D) change in an individual's phenotype caused by mutations.

Question 5

Extreme hunting pressure has caused northern elephant seals to become less genetically diverse because of:

Accepted Answer

A) genetic drift. 
B) population bottleneck. 
C) natural selection. 
D) founder effect. 
A) genetic drift. 
B) population bottleneck. 
C) natural selection. 
D) founder effect.

Question 6

Phenotypes that show a wide range of almost continuous variation,such as height or skin color in humans,are probably:

Accepted Answer

A) due to several sets of alleles working together. 
B) due to both alleles of one gene working together. 
C) acquired characteristics. 
D) dominant. 
A) due to several sets of alleles working together. 
B) due to both alleles of one gene working together. 
C) acquired characteristics. 
D) dominant.

Question 7

The original source of variation within a population comes from ________.

Accepted Answer

The answer of The original source of variation within a...

Question 8

Which of the following statements about evolution is true?

Accepted Answer

A) Evolution involves maintaining a constant frequency of alleles in the gene pool. 
B) Populations evolve. 
C) Individuals evolve. 
D) Evolution can proceed to a limited extent without the occurrence of mutation. 
A) Evolution involves maintaining a constant frequency of alleles in the gene pool. 
B) Populations evolve. 
C) Individuals evolve. 
D) Evolution can proceed to a limited extent without the occurrence of mutation.

Question 9

A small minority of mutations is adaptive,providing an improvement to the gene pool of the population.

Accepted Answer

A) True 
 B)False

Question 10

How successful an individual is at passing on its genes to the next generation is known as:

Accepted Answer

A) microevolution. 
B) adaptation. 
C) fitness. 
D) sexual selection. 
A) microevolution. 
B) adaptation. 
C) fitness. 
D) sexual selection.

Question 11

________ is necessary for a population to survive over successive generations in response to environmental changes.

Accepted Answer

A) Adaptation 
B) Sexual selection 
C) Speciation 
D) Gene flow 
A) Adaptation 
B) Sexual selection 
C) Speciation 
D) Gene flow

Question 12

The term "natural selection" is not interchangeable with the term "evolution" because:

Accepted Answer

A) natural selection is just a theory, whereas evolution has been proven. 
B) a population may evolve in ways other than through natural selection. 
C) Darwin coined the term "natural selection," but not "evolution." 
D) natural selection does not always lead to evolution. 
A) natural selection is just a theory, whereas evolution has been proven. 
B) a population may evolve in ways other than through natural selection. 
C) Darwin coined the term "natural selection," but not "evolution." 
D) natural selection does not always lead to evolution.

Question 13

Disruptive selection operates whenever:

Accepted Answer

A) a phenotype is more successful because it is rare. 
B) natural selection is disrupted by genetic drift. 
C) the extremes in a distribution of phenotypes are more fit than the average. 
D) only the largest individuals survive. 
A) a phenotype is more successful because it is rare. 
B) natural selection is disrupted by genetic drift. 
C) the extremes in a distribution of phenotypes are more fit than the average. 
D) only the largest individuals survive.

Question 14

Read the statement below, and then answer the following question(s).
A small population of deer is introduced to an island. All the males have 11 to 13 points on their antlers.
-If after several generations all males have 12-point antlers,this development will have been due to:

Accepted Answer

A) directional selection. 
B) disruptive selection. 
C) founder effect. 
D) stabilizing selection. 
A) directional selection. 
B) disruptive selection. 
C) founder effect. 
D) stabilizing selection.

Question 15

Read the statement below, and then answer the following question(s).
A small population of deer is introduced to an island. All the males have 11 to 13 points on their antlers.
-If after several generations most males have antlers with 20 points,this development will have been the result of:

Accepted Answer

A) directional selection. 
B) disruptive selection. 
C) founder effect. 
D) bottleneck effect. 
A) directional selection. 
B) disruptive selection. 
C) founder effect. 
D) bottleneck effect.

Question 16

Refer to the figure below, and then answer the question that follows.
  
-The changes in cranial capacity over the course of human evolution are an example of:

Accepted Answer

A) disruptive selection. 
B) stabilizing selection. 
C) directional selection. 
D) sexual selection. 
A) disruptive selection. 
B) stabilizing selection. 
C) directional selection. 
D) sexual selection.

Question 17

A population is:

Accepted Answer

A) a group of organisms that can successfully interbreed in nature but do not interbreed with other such groups. 
B) all the members of a species that live in a defined geographic region at the same time. 
C) all the different species that live in a defined geographic area at the same time. 
D) a group of different species that share common features. 
A) a group of organisms that can successfully interbreed in nature but do not interbreed with other such groups. 
B) all the members of a species that live in a defined geographic region at the same time. 
C) all the different species that live in a defined geographic area at the same time. 
D) a group of different species that share common features.

Question 18

If every sexually reproducing organism has only two alleles for each gene,how can there be a range of traits seen for a physical characteristic?

Accepted Answer

A) One of the alleles in an organism is expressed at different levels, while the other is turned off. 
B) Sometimes one of the alleles works, and other times the other allele works. 
C) There can be more than two variations of a gene in a population. 
D) In a population there are only two variations of a gene, but they are blended differently during sexual reproduction. 
A) One of the alleles in an organism is expressed at different levels, while the other is turned off. 
B) Sometimes one of the alleles works, and other times the other allele works. 
C) There can be more than two variations of a gene in a population. 
D) In a population there are only two variations of a gene, but they are blended differently during sexual reproduction.

Question 19

Two nearby populations in which there is some movement of individuals between the populations are an example of:

Accepted Answer

A) disruptive selection. 
B) bottleneck effect. 
C) genetic drift. 
D) gene flow. 
A) disruptive selection. 
B) bottleneck effect. 
C) genetic drift. 
D) gene flow.

Question 20

Which of the following statements is true?

Accepted Answer

A) The advantage a trait conveys depends on its environmental context. 
B) A population will always evolve to fit current conditions. 
C) All traits are simultaneously maximized in a population. 
D) All traits currently in a population must have provided a reproductive advantage at some point in time. 
A) The advantage a trait conveys depends on its environmental context. 
B) A population will always evolve to fit current conditions. 
C) All traits are simultaneously maximized in a population. 
D) All traits currently in a population must have provided a reproductive advantage at some point in time.

Exam 17: The Means of Evolution: Microevolution

Refer to the figure below, and then answer the question that follows. -Human birth weights are an example of:

The formation of new species over many generations is an example of:

The mate-attracting elaborate plumage of the male peacock is a result of:

At its most basic level,evolution is a:

Extreme hunting pressure has caused northern elephant seals to become less genetically diverse because of:

Phenotypes that show a wide range of almost continuous variation,such as height or skin color in humans,are probably:

The original source of variation within a population comes from ________.

Which of the following statements about evolution is true?

A small minority of mutations is adaptive,providing an improvement to the gene pool of the population.

How successful an individual is at passing on its genes to the next generation is known as:

________ is necessary for a population to survive over successive generations in response to environmental changes.

The term "natural selection" is not interchangeable with the term "evolution" because:

Disruptive selection operates whenever:

Read the statement below, and then answer the following question(s). A small population of deer is introduced to an island. All the males have 11 to 13 points on their antlers. -If after several generations all males have 12-point antlers,this development will have been due to:

Read the statement below, and then answer the following question(s). A small population of deer is introduced to an island. All the males have 11 to 13 points on their antlers. -If after several generations most males have antlers with 20 points,this development will have been the result of:

Refer to the figure below, and then answer the question that follows. -The changes in cranial capacity over the course of human evolution are an example of:

A population is:

If every sexually reproducing organism has only two alleles for each gene,how can there be a range of traits seen for a physical characteristic?

Two nearby populations in which there is some movement of individuals between the populations are an example of:

Which of the following statements is true?

Science As a Way of Learning: a Guide to the Natural World

Fundamental Building Blocks: Chemistry, water, and Ph

Lifes Components: Biological Molecules

Lifes Home: the Cell

Lifes Border: the Plasma Membrane

Lifes Mainspring: an Introduction to Energy

Vital Harvest: Deriving Energy From Food

The Green Worlds Gift: Photosynthesis

The Links in Lifes Chain: Genetics and Cell Division

Preparing for Sexual Reproduction: Meiosis

The First Geneticist: Mendel and His Discoveries

Units of Heredity: Chromosomes and Inheritance

Passing on Lifes Information: Dna Structure and Replication

How Proteins Are Made: Genetic Transcription, translation, and Regulation

The Future Isnt What It Used to Be: Biotechnology

An Introduction to Evolution: Charles Darwin, evolutionary Thought, and the Evidence for Evolution

The Outcomes of Evolution: Macroevolution

A Slow Unfolding: the History of Life on Earth

Arriving Late,traveling Far: the Evolution of Human Beings

Viruses,bacteria,archaea,and Protists: the Diversity of Life 1

Fungi: the Diversity of Life 2

Animals: the Diversity of Life 3

Plants: the Diversity of Life 4

The Angiosperms: Form and Function in Flowering Plants

Body Support and Movement: the Integumentary, skeletal, and Muscular Systems

Communication and Control 1: the Nervous System

Communication and Control 2: the Endocrine System

Defending the Body: the Immune System

Transport and Exchange 1: Blood and Breath

Transport and Exchange 2: Digestion, nutrition, and Elimination

An Amazingly Detailed Script: Animal Development

How the Baby Came to Be: Human Reproduction

An Interactive Living World 1: Populations in Ecology

An Interactive Living World 2: Communities in Ecology

An Interactive Living World 3: Ecosystems and Biomes

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