Campbell Biology
Second Canadian Edition
Chapter 23
The Evolution of Populations
Copyright © 2018 Pearson Canada Inc. 23 - 1
,Overview: That Mystery of Mysteries
(1 of 2)
• In the Galápagos Islands Darwin discovered plants and
animals not found elsewhere on Earth
Figure 24.1
,Overview: That Mystery of Mysteries
(2 of 2)
• The Galápagos giant tortoise is unique to the islands
, Mystery of Mysteries
• Speciation, the origin of new species, is at the focal point
of evolutionary theory
• Evolutionary theory explains how new species originate
and how populations evolve
• Microevolution consists of changes in allele frequency in
a population over time
• Macroevolution refers to broad patterns of evolutionary
change above the species level
Second Canadian Edition
Chapter 23
The Evolution of Populations
Copyright © 2018 Pearson Canada Inc. 23 - 1
,Overview: That Mystery of Mysteries
(1 of 2)
• In the Galápagos Islands Darwin discovered plants and
animals not found elsewhere on Earth
Figure 24.1
,Overview: That Mystery of Mysteries
(2 of 2)
• The Galápagos giant tortoise is unique to the islands
, Mystery of Mysteries
• Speciation, the origin of new species, is at the focal point
of evolutionary theory
• Evolutionary theory explains how new species originate
and how populations evolve
• Microevolution consists of changes in allele frequency in
a population over time
• Macroevolution refers to broad patterns of evolutionary
change above the species level
