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Chapter 24 The Origin of Species
Lecture Outline

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Subject: 
Biology
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SocialTags: 
Biology
Evolutionary biology
Philosophy of biology
Speciation
Ecology
Population genetics
Scientific classification
Allopatric speciation
Sympatry
Sibling species
Evolution
Reproductive isolation
Environment

Chapter 24 The Origin of Species Lecture Outline Overview: That ?Mystery of Mysteries? Darwin visited the Gal?pagos Islands and found them filled with plants and animals that lived nowhere else in the world. He realized that he was observing newly emerged species on these young islands. Speciation?the origin of new species?is at the focal point of evolutionary theory because the appearance of new species is the source of biological diversity. Microevolution is the study of adaptive change in a population. Macroevolution addresses evolutionary changes above the species level. It deals with questions such as the appearance of evolutionary novelties (e.g., feathers and flight in birds) that can be used to define higher taxa.

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