THE THEORY OF EVOLUTION CHARLES DARWIN EVIDENCE FOR EVOLUTION MECHANISMS FOR EVOLUTION NATURAL SELECTION SPECIATION .

THE THEORY OF EVOLUTION

• CHARLES DARWIN• EVIDENCE FOR EVOLUTION• MECHANISMS FOR EVOLUTION• NATURAL SELECTION• SPECIATION

http://evolution.berkeley.edu/evolibrary/home.php

THE THEORY OF EVOLUTION

• CHARLES DARWIN• EVIDENCE FOR EVOLUTION• MECHANISMS FOR EVOLUTION• NATURAL SELECTION• SPECIATION

http://evolution.berkeley.edu/evolibrary/home.php

CHARLES DARWIN : 1809-1882

• ENGLISH NATURALIST• TRAVELED AROUND THE WORLD ON THE

BEAGLE – FAMOUS IN THE GALAPAGOS ISLANDS

• OBSERVED MANY SPECIES AND FOSSILS• WHY DID SOME SPECIES SURVIVE WHILE

OTHERS BECAME EXTINCT?• PUBLISHED “ON THE ORIGIN OF THE

SPECIES” MAKING THE CASE FOR EVOLUTION

• NATURAL SELECTION

I have called this principle, by whicheach slight variation, if useful, is preserved,

by the term Natural Selection.

  —Charles Darwin from "The Origin of Species"

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www.darwinday.org/englishL/life/beagle.htUsed by permission of Darwin Day Celebration (at DarwinDay.org), 2006

www.darwinday.org/englishL/life/beagle.html

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THE THEORY OF EVOLUTION

• CHARLES DARWIN• EVIDENCE FOR EVOLUTION• MECHANISMS FOR EVOLUTION• NATURAL SELECTION• SPECIATION

http://evolution.berkeley.edu/evolibrary/home.php

EVIDENCE OF EVOLUTION

• STRUCTURAL ADAPTATIONS– MIMICRY– CAMOUFLAGE

http://evolution.berkeley.edu/evolibrary/home.phphttp://science.howstuffworks.com/animal-camouflage2.htm

EVIDENCE OF EVOLUTION

• STRUCTURAL ADAPTATIONS

– MIMICRY

– CAMOUFLAGE

– MILLIONS OF YEARS

• PHYSIOLOGICAL ADAPTATIONS

– CHANGE IN A METABOLIC PROCESS

– WHAT DO YOU HEAR ABOUT IN THE NEWS ABOUT SOME BACTERIA?

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OTHER EVIDENCE OF EVOLUTION

• FOSSILS

• ANATOMY

– HOMOLOGOUS STRUCTURES

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OTHER EVIDENCE OF EVOLUTION

• FOSSILS

• ANATOMY

– HOMOLOGOUS STRUCTURES

– ANALOGOUS STRUCTURES

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OTHER EVIDENCE OF EVOLUTION

• FOSSILS

• ANATOMY

– HOMOLOGOUS STRUCTURES

– ANALOGOUS STRUCTURES

– VESTIGIAL STRUCTURE

– EMBRYOS

Life Sciences-HHMI Outreach. Copyright 2006 President and Fellows of Harvard College.

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OTHER EVIDENCE OF EVOLUTION

• FOSSILS

• ANATOMY

– HOMOLOGOUS STRUCTURES

– ANALOGOUS STRUCTURES

– VESTIGIAL STRUCTURE

– EMBRYOS

• BIOCHEMISTRY

– WHAT 2 MOLECULES?

Life Sciences-HHMI Outreach. Copyright 2006 President and Fellows of Harvard College.

http://evolution.berkeley.edu/evolibrary/home.php

THE THEORY OF EVOLUTION

• CHARLES DARWIN• EVIDENCE FOR EVOLUTION• MECHANISMS FOR EVOLUTION• NATURAL SELECTION• SPECIATION

Life Sciences-HHMI Outreach. Copyright 2006 President and Fellows of Harvard College.http://evolution.berkeley.edu/evolibrary/home.php

MECHANISMS FOR EVOLUTION

• DO POPULATIONS OR INDIVIDUALS EVOLVE?DO POPULATIONS OR INDIVIDUALS EVOLVE?• WHAT IS A GENE POOLWHAT IS A GENE POOL• HOW CAN THE GENE POOL CHANGE?HOW CAN THE GENE POOL CHANGE?

– MUTATIONMUTATION– GENETIC DRIFTGENETIC DRIFT– GENE FLOWGENE FLOW

• WOULD THESE THINGS EFFECT A LARGE POPULATION WOULD THESE THINGS EFFECT A LARGE POPULATION OR A SMALL POPULATION MORE?OR A SMALL POPULATION MORE?

ALL IMAGES: http://evolution.berkeley.edu/evolibrary/home.php

THE THEORY OF EVOLUTION

• CHARLES DARWIN• EVIDENCE FOR EVOLUTION• MECHANISMS FOR EVOLUTION• NATURAL SELECTION• SPECIATION

http://evolution.berkeley.edu/evolibrary/home.php

WHAT IS NATURAL SELECTION?

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SURVIVAL OF THE FITTEST

THE THEORY OF EVOLUTION

• CHARLES DARWIN• EVIDENCE FOR EVOLUTION• MECHANISMS FOR EVOLUTION• NATURAL SELECTION• SPECIATION

Life Sciences-HHMI Outreach. Copyright 2006 President and Fellows of Harvard College.

http://evolution.berkeley.edu/evolibrary/home.php

WHAT IS SPECIATION?• GEOGRAPHIC ISOLATIONGEOGRAPHIC ISOLATION

• REPRODUCTIVE ISOLATIONREPRODUCTIVE ISOLATION

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WHAT IS SPECIATION?

• GEOGRAPHIC ISOLATIONGEOGRAPHIC ISOLATION

• REPRODUCTIVE ISOLATIONREPRODUCTIVE ISOLATION

• GRADUALISMGRADUALISM

• PUNCTUATED EQUILIBRIUMPUNCTUATED EQUILIBRIUM

WHAT IS SPECIATION?

• GEOGRAPHIC ISOLATIONGEOGRAPHIC ISOLATION

• REPRODUCTIVE ISOLATIONREPRODUCTIVE ISOLATION

• GRADUALISMGRADUALISM

• PUNCTUATED EQUILIBRIUMPUNCTUATED EQUILIBRIUM

• DIVERGENT EVOLUTIONDIVERGENT EVOLUTION– ADAPTIVE RADIATIONADAPTIVE RADIATION

• CONVERGENT EVOLUTIONCONVERGENT EVOLUTION

ADAPTIVE RADIATION – AN EXAMPLE OF DIVERGENT EVOLUTION

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http://www.vanderbilt.edu/AnS/english/Clayton/Galapago_finches.gif

CONVERGENT EVOLUTION – WHAT IS AN EXAMPLE?

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