'Reduced hybrid viability' presentation slideshows

Speciation , the origin of new species, is at the focal point of evolutionary theory

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Chapter 24

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BIO 3A Fall 2011 Chapter 24 Origin of Species

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Chapter 24

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Chapter 24 The Origin of Species

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Speciation Where do species come from?

Speciation Where do species come from?. Two Basic Patterns of Evolutionary Change. Anagenesis. Cladogenesis. Definition of a species. Biological species

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CHAPTER 24

CHAPTER 24. THE ORIGIN OF SPECIES. 1. OVERVIEW. A. Speciation Is defined as the origin of new species (process by which one species splits into two or more species) Is at the focal point of evolutionary theory which must explain how new species originate and how populations evolve

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The Origin of Species

The Origin of Species. Speciation. Speciation is the process by which one species splits into two or more species Speciation explains the features shared between organisms due to inheritance from their recent common ancestor.

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Speciation

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Population Changes

Population Changes . Natural Selection. Natural Selection. Multiple observations that life has changed over generations. What was missing was a mechanism of explaining HOW organisms changed.

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Evolution Review

Evolution Review. Chapters 22-25. Chapter 22. Decent with Modification Natural selection Evidence that supports Natural Selection Direct observations Fossils Homology Biogeography. Chapter 22. Artificial selection Paleontology Vestigial structures Convergent evolution. Chapter 23.

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