Question 1

What causes evolutionary change in a small population?

Accepted Answer

Evolutionary change

Question 2

The fish in a certain population average 10 millimeters in length. Imagine that a population of predatory birds arrives in the area, but they cannot eat fish longer than 15 millimeters. After a decade, if the fish average 14 millimeters in length, what probably happened?

Accepted Answer

A) The presence of the predator caused mutations for larger fish to occur. 
B) There was stabilizing selection for fish length. 
C) The longer fish survived and produced more offspring than shorter fish. 
D) There was disruptive selection for fish length. 
E) The fish and the predator coevolved. 
A) The presence of the predator caused mutations for larger fish to occur. 
B) There was stabilizing selection for fish length. 
C) The longer fish survived and produced more offspring than shorter fish. 
D) There was disruptive selection for fish length. 
E) The fish and the predator coevolved.

Question 3

Natural selection acts on phenotypes to affect the evolution of ________.

Accepted Answer

The answer of Natural selection acts on phenotypes to affect...

Question 4

The process by which allele frequencies are altered in a population to improve the odds of attracting a mate is called:

Accepted Answer

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

Question 5

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 6

Evolution can be defined as:

Accepted Answer

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

Question 7

Which of the following can cause evolutionary change in a small population?

Accepted Answer

A) genetic drift 
B) lack of mutations 
C) homozygous individuals 
D) all recessive alleles 
E) lack of gene flow 
A) genetic drift 
B) lack of mutations 
C) homozygous individuals 
D) all recessive alleles 
E) lack of gene flow

Question 8

Environmental change causes the heritable variations in individuals that natural selection acts upon. True or False?

Accepted Answer

A) True 
 B)False

Question 9

Mutations are important because they:

Accepted Answer

A) provide variation that can result in evolutionary change. 
B) occur in response to environmental demands. 
C) are always beneficial in the individuals affected by them. 
D) usually provide an individual with increased reproductive rates. 
A) provide variation that can result in evolutionary change. 
B) occur in response to environmental demands. 
C) are always beneficial in the individuals affected by them. 
D) usually provide an individual with increased reproductive rates.

Question 10

A population carries two alleles for a trait in which T is dominant and t is recessive. In the Hardy-Weinberg equation, q2 represents:

Accepted Answer

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

Exam 15: How Populations Evolve

What causes evolutionary change in a small population?

The fish in a certain population average 10 millimeters in length. Imagine that a population of predatory birds arrives in the area, but they cannot eat fish longer than 15 millimeters. After a decade, if the fish average 14 millimeters in length, what probably happened?

Natural selection acts on phenotypes to affect the evolution of ________.

The process by which allele frequencies are altered in a population to improve the odds of attracting a mate is called:

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

Evolution can be defined as:

Which of the following can cause evolutionary change in a small population?

Environmental change causes the heritable variations in individuals that natural selection acts upon. True or False?

Mutations are important because they:

A population carries two alleles for a trait in which T is dominant and t is recessive. In the Hardy-Weinberg equation, q2 represents:

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

The Continuity of Life: Cellular 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 Amidst 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

How Do Ecosystems Work

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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