The Origin of Species

1
The Origin of Species

• Chapter 24

2
The Mystery of Speciation

• Morphological Species Concept
• Biological Species Concept

3
Reproductive Isolation Is Key

• Genetic Divergence
• Microevolution
• Macroevolution

4
Other Definitions of a Species

• Paleontological species concept
• Ecological species concept
• Phylogenetic species concept

5
Mechanisms of Reproductive Isolation

• Pre-zygotic Mechanisms
• Post-zygotic Mechanisms

6
Pre-zygotic Mechanisms
7
Post-zygotic Mechanisms
8
Models of Speciation

• Allopatric speciation
• Sympatric speciation
• Parapatric speciation

9
Allopatric versus Sympatric Speciation
10
Allopatric Speciation
11
Sympatric Speciation
12
Parapatric Speciation
13
Adaptive Radiation
14
Patterns of Speciation
15
Tempo of Speciation
16
END TEST FOUR MATERIAL!!!

• Test Wed. (chapter 20, 22-24)
• Lab Final for Wednesday Students
• Remember it is not the same as old quizzes.
• It is based on concepts covered in old quizzes.
• Final Exam Scheduled for Monday Dec. 10th at
  1000 am
• Projects and Community Service Due on or before
  Dec. 10th.