'Mechanical isolation' diaporamas de présentation

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

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Anthropology

Anthropology . Chapters 1 & 2. What is Anthropology?. From the Greek Anthropos = man Logos = study Anthropology is the study of man. Fields of Anthropology. Biological (Physical) Anthropology Human paleontology a.k.a. paleoanthropology - studies the emergence and evolution of humans

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Chapter 24 The Origin of Species

Chapter 24 The Origin of Species. Question?. What is a species? Comment - Evolution theory must also explain how species originate. Two Concepts of Species. Morphospecies. Problem. Where does extensive phenotype variation fit?. Two Schools. Biological Species. Key Points. Heaven Scent

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Chapter 24

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MECHANISMS OF EVOLUTION: GENETIC VARIATION

MECHANISMS OF EVOLUTION: GENETIC VARIATION. Quantity of DNA and the number of genes are highly variable among species Variation within a species is the result of the variety & random recombination of alleles possessed by individuals

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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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Types of evolutionary change

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Changes in Species

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The Origin of Species

The Origin of Species. Species. Biological Species. Ring Species. Prezygotic Habitat Isolation Behavior Isolation Temporal Isolation Mechanical Isolation Gametic Isolation. Postzygotic Hybrid Sterility Hybrid Inviability Hybrid Breakdown. Barriers. Habitat Isolation.

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These are the events that cause evolution of a population:

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SPECIES AND SPECIATION

SPECIES AND SPECIATION. What is a species?. Morphological Species Concept Phylogenetic Species Concept Biological Species Concept. Morphological Species Concept. Use physical similarities to classify species. Phylogenetic Species Concept.

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Ch 17 Speciation

Ch 17 Speciation . Lecture outline . Speciation, species and linneaus. Species concepts. Biological Species Concept: Lineage Species Concept:. Allopatric Isolation . http://wps.pearsoncustom.com/wps/media/objects/3014/3087289/Web_Tutorials/18_A01.swf. Sympatric Isolation .

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ADAPTATIONS AND EVOLLUTION OF SPECIES

ADAPTATIONS AND EVOLLUTION OF SPECIES. What is evolution? The change in the genetic make-up of a species over time. How does evolution occur?. GRADUALISM gradual process that goes on all the time PUNCTUATED EQUILIBRIUM periods of rapid change are separated by periods of little or no change.

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Review Questions

Review Questions.

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