Question 1

Natural selection selects for or against certain

Accepted Answer

A)  alleles. 
B)  populations. 
C)  gene pools. 
D)  genotypes. 
E)  phenotypes. 
A)  alleles. 
B)  populations. 
C)  gene pools. 
D)  genotypes. 
E)  phenotypes.

Question 2

Members of one gender influence allele frequencies in a population by choosing mates according to some conspicuous feature in the other gender in the process called

Accepted Answer

A)  genetic drift. 
B)  fitness. 
C)  random mutation. 
D)  sexual selection. 
E)  random evolution. 
A)  genetic drift. 
B)  fitness. 
C)  random mutation. 
D)  sexual selection. 
E)  random evolution.

Question 3

Natural selection causes genetic changes in an individual.

Accepted Answer

A) True 
 B)False

Question 4

When different species closely interact for an extended period of time and develop new adaptations in response to each other, it is called

Accepted Answer

A)  gene flow. 
B)  genetic drift. 
C)  sexual selection. 
D)  stabilizing selection. 
E)  coevolution. 
A)  gene flow. 
B)  genetic drift. 
C)  sexual selection. 
D)  stabilizing selection. 
E)  coevolution.

Question 5

When natural selection tends to split a population into two phenotypic groups, it is called

Accepted Answer

A)  genetic drift. 
B)  balanced polymorphism. 
C)  coevolution. 
D)  gene flow. 
E)  stabilizing selection. 
A)  genetic drift. 
B)  balanced polymorphism. 
C)  coevolution. 
D)  gene flow. 
E)  stabilizing selection.

Question 6

Inbreeding is defined as

Accepted Answer

A)  reproduction among unrelated individuals. 
B)  sexual population among unrelated individuals. 
C)  sexual reproduction among closely related individuals. 
D)  reproduction within a geographically isolated population. 
E)  sexual reproduction in a large population. 
A)  reproduction among unrelated individuals. 
B)  sexual population among unrelated individuals. 
C)  sexual reproduction among closely related individuals. 
D)  reproduction within a geographically isolated population. 
E)  sexual reproduction in a large population.

Question 7

Gene flow results when new individuals migrate into an area and join the breeding population there.

Accepted Answer

A) True 
 B)False

Question 8

Imagine that a mutation for red eye color becomes very common in a population of flies because female flies in this population prefer to mate with red- eyed males. This is an example of

Accepted Answer

A)  directional selection. 
B)  stabilizing selection. 
C)  disruptive selection. 
D)  sexual selection. 
E)  genetic drift. 
A)  directional selection. 
B)  stabilizing selection. 
C)  disruptive selection. 
D)  sexual selection. 
E)  genetic drift.

Question 9

Explain how a recessive trait can be the most frequent phenotype in a population.

Accepted Answer

The population's environment c

Question 10

The net migration of alleles into or out of a population from neighboring populations is called

Accepted Answer

A)  gene flow. 
B)  genetic drift. 
C)  sexual selection. 
D)  stabilizing selection. 
E)  coevolution. 
A)  gene flow. 
B)  genetic drift. 
C)  sexual selection. 
D)  stabilizing selection. 
E)  coevolution.

Question 11

The change in one population driven by a change in an associated population is called

Accepted Answer

A)  genetic drift. 
B)  assortative evolution. 
C)  fitness. 
D)  coevolution. 
E)  random mutation. 
A)  genetic drift. 
B)  assortative evolution. 
C)  fitness. 
D)  coevolution. 
E)  random mutation.

Question 12

Which of the following mutations would increase evolutionary fitness?

Accepted Answer

A)  One that removes other alleles from the population 
B)  One that increases the birth weight of offspring while decreasing the number of offspring 
C)  One that attracts more potential mates without increasing the frequency of reproduction 
D)  One that increases the life span of the organism 
E)  One that increases the frequency of successful reproduction 
A)  One that removes other alleles from the population 
B)  One that increases the birth weight of offspring while decreasing the number of offspring 
C)  One that attracts more potential mates without increasing the frequency of reproduction 
D)  One that increases the life span of the organism 
E)  One that increases the frequency of successful reproduction

Question 13

Natural selection causes genetic changes in populations.

Accepted Answer

A) True 
 B)False

Question 14

Suppose a new mutation that improves metabolic efficiency is lost from a small population of mammals living in a region of seasonal food scarcity after a hurricane eliminates half the mammal population. This is an example of

Accepted Answer

A)  directional selection. 
B)  stabilizing selection. 
C)  disruptive selection. 
D)  sexual selection. 
E)  genetic drift. 
A)  directional selection. 
B)  stabilizing selection. 
C)  disruptive selection. 
D)  sexual selection. 
E)  genetic drift.

Question 15

What causes evolutionary change in a small population?

Accepted Answer

Evolutionary change in small p

Question 16

The bright coloration of male birds is often the result of

Accepted Answer

A)  gene flow. 
B)  genetic drift. 
C)  sexual selection. 
D)  stabilizing selection. 
E)  coevolution. 
A)  gene flow. 
B)  genetic drift. 
C)  sexual selection. 
D)  stabilizing selection. 
E)  coevolution.

Question 17

Genetic drift is more common in large populations than in small populations.

Accepted Answer

A) True 
 B)False

Question 18

A population carries two alleles for a trait in which T is dominant and t is recessive. In the Hardy- Weinberg equation, p2 represents the

Accepted Answer

A)  proportion of homozygous dominant individuals. 
B)  decrease in heterozygous individuals. 
C)  proportion of homozygous recessive individuals. 
D)  increase in homozygous individuals. 
E)  proportion of heterozygous individuals. 
A)  proportion of homozygous dominant individuals. 
B)  decrease in heterozygous individuals. 
C)  proportion of homozygous recessive individuals. 
D)  increase in homozygous individuals. 
E)  proportion of heterozygous individuals.

Question 19

In a single family, the parents have brown eyes but all five of their children have green eyes. This is an example of evolution.

Accepted Answer

A) True 
 B)False

Question 20

Evolution can be defined as

Accepted Answer

A)  a change in the genetic makeup of a population over time. 
B)  one species diverging into two species. 
C)  an individual changing into another species. 
D)  a change in the genetic makeup of an organism over time. 
E)  a change in the phenotype of an individual over his or her lifetime. 
A)  a change in the genetic makeup of a population over time. 
B)  one species diverging into two species. 
C)  an individual changing into another species. 
D)  a change in the genetic makeup of an organism over time. 
E)  a change in the phenotype of an individual over his or her lifetime.

Exam 16: How Populations Evolve

Natural selection selects for or against certain

Members of one gender influence allele frequencies in a population by choosing mates according to some conspicuous feature in the other gender in the process called

Natural selection causes genetic changes in an individual.

When different species closely interact for an extended period of time and develop new adaptations in response to each other, it is called

When natural selection tends to split a population into two phenotypic groups, it is called

Inbreeding is defined as

Gene flow results when new individuals migrate into an area and join the breeding population there.

Imagine that a mutation for red eye color becomes very common in a population of flies because female flies in this population prefer to mate with red- eyed males. This is an example of

Explain how a recessive trait can be the most frequent phenotype in a population.

The net migration of alleles into or out of a population from neighboring populations is called

The change in one population driven by a change in an associated population is called

Which of the following mutations would increase evolutionary fitness?

Natural selection causes genetic changes in populations.

Suppose a new mutation that improves metabolic efficiency is lost from a small population of mammals living in a region of seasonal food scarcity after a hurricane eliminates half the mammal population. This is an example of

What causes evolutionary change in a small population?

The bright coloration of male birds is often the result of

Genetic drift is more common in large populations than in small populations.

A population carries two alleles for a trait in which T is dominant and t is recessive. In the Hardy- Weinberg equation, p2 represents the

In a single family, the parents have brown eyes but all five of their children have green eyes. This is an example of evolution.

Evolution can be defined as

An Introduction to Life on Earth

Atoms, Molecules, and Life

Biological Molecules

Cell Structure and Function

Cell Membrane Structure and Function

Energy Flow in the Life of a Cell

Capturing Solar Energy: Photosynthesis

Harvesting Energy: Glycolysis and Cellular Respiration

Cellular Reproduction

Meiosis: the Basis of Sexual Reproduction

Patterns of Inheritance

Dna: the Molecule of Heredity

Gene Expression and Regulation

Biotechnology

Principles of Evolution

The Origin of Species

The History of Life

Systematics: Seeking Order Amid Diversity

The Diversity of Prokaryotes and Viruses

The Diversity of Protists

The Diversity of Plants

The Diversity of Fungi

Animal Diversity I: Invertebrates

Animal Diversity II: Vertebrates

Animal Behavior

Population Growth and Regulation

Community Interactions

Energy Flow and Nutrient Cycling in Ecosystems

Earths Diverse Ecosystems

Conserving Earths Biodiversity

Homeostasis and the Organization of the Animal Body

Circulation

Respiration

Nutrition and Digestion

The Urinary System

Defenses Against Disease

Chemical Control of the Animal Body: the Endocrine System

The Nervous System

The Senses

Action and Support: the Muscles and Skeleton

Animal Reproduction

Animal Development

Plant Anatomy and Nutrient Transport

Plant Reproduction and Development

Plant Responses to the Environment

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