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Speciation

Living Environment - Evolution Review

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Biology
Evolutionary biology
Evolution
Evidence of common descent
On the Origin of Species
Charles Darwin
Speciation
Vestigiality
Allopatric speciation
Species
Galápagos tortoise
Comparative anatomy

Evolution Evolution is change over time. The Theory of Evolution states that all organisms share a single common ancestor and have evolved over time. It also states that this has occurred largely due to changes in environmental conditions that have led to a necessity for organisms to change and adapt or go extinct. Darwin?s Theory of Natural Selection In 1831, Charles Darwin set sail on the HMS Beagle as the ship?s naturalist. His job was to collect biological and geological specimens. After traveling from England across the Atlantic and collecting specimens along the eastern and western coasts of South America, the ship landed in the Galapagos Islands. Darwin?s Theory of Natural Selection

Ap Bio Chapter 24

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AP Biology Reading Guide Chapter 24: The Origin of Species Fred and Theresa Holtzclaw Copyright ? 2010 Pearson Education, Inc. - 1 - Name _______________________ Period ___________ Chapter 24: The Origin of Species Overview 1. What was Darwin?s ?mystery of mysteries?? 2. Define speciation. 3. Distinguish between microevolution and macroevolution. Concept 24.1 The biological species concept emphasizes reproductive isolation 4. Use the biological species concept to define species. 5. What is required for the formation of new species? 6. What are hybrids? 7. Explain the two types of barriers that maintain reproductive isolation.

AP bio chapter 24 outline notes

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On the Origin of Species
Species
Environment

CHAPTF,F.24 THE ORIGIN OF SPECIES OUTLII\E L What Is a SPecies? A. The biological species concept emphasizes reproductive isolation B. prezygotic and postzygotic barriers isolate the gene pools of biological species C. The biological species concept does not work in all situations D. Other species concepts emphasize features and processes that identiff and unite species members II. Modes of SPeciation A. Geographical isolation can lead to the origin of species: allopatric speciation B. A new species can originate in the geographical midst of the parent species: sympatric sPeciation c. Genetic change in populations can account for speciation D. The punctuated equilibrium model has stimulated research on the tempo of speciation The Origin of Evolutionary NoveltY

Chapter 24 The Origin of Species
Lecture Outline

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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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