Chapter 23 Outline
The Origin Of Species
Advanced Placement Biology
Roslyn High School
Species Are The Basic Units Of Evolution.
What Is The Nature Of A Species?
How Are Sympatric Species Distinctive?
How Does Geography Cause Variation Within A Species?
What Is The Biological Species Concept?

Species Maintain Their Genetic Distinctiveness Through Barriers To
Reproduction.
Why Do Prezygotic Isolating Mechanisms Exist?
What Is Ecological Isolation?
What Is Behavioral Isolation?
What Is Temporal Isolation?

What Is Mechanical Isolation?
How Is The Fusion Of Gametes Prevented?
Why Do Postzygotic Isolating Mechanisms Exist?
Why Are There Problems With The Biological Species Concept?

What Is The Connection Between Natural Selection And The Ecological Species Concept?
What Other Problems Exist With The Biological Species Concept?
We Have Learned A Great Deal About How Species Form.
How Can Reproduction By Isolation Evolve As A By-Product Of Evolutionary Change?

How Can Selection Reinforce Isolating Mechanisms?
What Is The Role Of Natural Selection In Speciation?
How Can Random Changes Cause Reproductive Isolation?
What Is The Relationship Between Adaptation And Speciation?

How Does Geography Affect Speciation?
What Is Allopatric Speciation?
What Is Sympatric Speciation?
How Does Instantaneous Speciation Occur Through Polyploidy?
How Does Sympatric Speciation Occur By Disruptive Selection?

Clusters Of Species Reflect Rapid Evolution.
How Did The Hawaiian Drosophila Evolve?
How Do Darwin’s Finches Reflect Rapid Evolution?

How Are Lake Victoria Cichlid Fishes An Example Of Rapid Evolution?
Why Have They Recently Radiated?
How Diverse Are The Cichlids?
What Can Cause Their Abrupt Extinction?
How Do New Zealand Buttercups Reflect Rapid Evolution?

What Is The Pace Of Evolution?
Does Evolution Occur In Spurts?
How Do Speciation And Extinction Occur Through Time?

What Is The Sixth Extinction?
What Is The Future Of Evolution?
How Will Evolution Operate In The Future?
How Will Humans Evolve In The Future?