G10

EVOLUTION

International School of

Tanganyika

Mr Kremer

G10

EVOLUTION

International School of

Tanganyika

Mr Kremer

Evolution: Key concepts

• History of evolutionary theories

• Darwin-Wallace model of natural selection

• Speciation, tectonics, + environmental pressure

• Evidence of evolution

Evolution

Evolution

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Evolution of Evolution

Evolutionary Thought

CreationismUse and Disuse

Natural SelectionGradualism

Punctuated Equilibrium

Image source: http://evolution.berkeley.edu/evosite/history/

History of Evolutionary Thought

• Creationism

• Catastrophism

• Use and Disuse

• Natural Selection

• Gradualism

• Punctuated Equilibrium

Image source: http://new-indology.blogspot.com

History of Evolutionary Thought

• Creationism

• Catastrophism

• Use and Disuse

• Natural Selection

• Gradualism

• Punctuated Equilibrium

Image source: http://www.nwcreation.net

History of Evolutionary Thought

• Creationism

• Catastrophism

• Use and Disuse

• Natural Selection

• Gradualism

• Punctuated Equilibrium Image source:

http://www.zo.utexas.edu

History of Evolutionary Thought

• Creationism

• Catastrophism

• Use and Disuse

• Natural Selection

• Gradualism

• Punctuated Equilibrium

Image source: http://evolution.berkeley.edu

History of Evolutionary Thought

• Creationism

• Catastrophism

• Use and Disuse

• Natural Selection

• Gradualism

• Punctuated Equilibrium

Image source: http://casarcia.com

Natural Selection

Natural Selection• Darwin and Wallace

• Mutations neither inherently good nor bad

• Environment determines success

• Helps survival: passed on to offspring

• Hurts survival: more likely to die

Natural Selection• Darwin and Wallace

• Mutations neither inherently good nor bad

• Environment determines success

• Helps survival: passed on to offspring

• Hurts survival: more likely to die

Image source: http://www.goecuador.com

Image source: http://www.ucl.ac.uk

Natural Selection• Darwin and Wallace

• Mutations neither inherently good nor bad

• Environment determines success

• Helps survival: passed on to offspring

• Hurts survival: more likely to die

Image source: http://casarcia.com

Natural Selection• Darwin and Wallace

• Mutations neither inherently good nor bad

• Environment determines success

• Helps survival: passed on to offspring

• Hurts survival: more likely to die

Image source: http://www.avibushistoriae.com

Natural Selection• Darwin and Wallace

• Mutations neither inherently good nor bad

• Environment determines success

• Helps survival: passed on to offspring

• Hurts survival: more likely to die

Image source: http://www.avibushistoriae.com

Natural Selection• Darwin and Wallace

• Mutations neither inherently good nor bad

• Environment determines success

• Helps survival: passed on to offspring

• Hurts survival: more likely to die

Image source: http://true-wildlife.blogspot.com

Natural Selection• Darwin and Wallace

• Mutations neither inherently good nor bad

• Environment determines success

• Helps survival: passed on to offspring

• Hurts survival: more likely to die

Image source: http://pepsisummersdolls.blogspot.com

Natural Selection• Darwin and Wallace

• Mutations neither inherently good nor bad

• Environment determines success

• Helps survival: passed on to offspring

• Hurts survival: more likely to die

Image source: http://users.rcn.com/jkimball

Evolution Fundamentals

Evolution Fundament

als

VariationInheritanceSelection

TimeSpeciation

Fundamentals of Evolution

• Variation

• Inheritance

• Selection

• Time

• Speciation

http://www.eeob.iastate.edu

Fundamentals of Evolution

• Variation

• Inheritance

• Selection

• Time

• Speciation

Image source: http://wikids-life.wikispaces.com

Fundamentals of Evolution

• Variation

• Inheritance

• Selection

• Time

• Speciation

Image source: http://livinglifewithoutanet.wordpress.com

Fundamentals of Evolution

• Variation

• Inheritance

• Selection

• Time

• SpeciationImage source:

http://evolution.berkeley.edu/evosite/evo101/VC1bAllopatric.shtml

Fundamentals of Evolution

• Variation

• Inheritance

• Selection

• Time

• Speciation

Image source: http://teachers.greenville.k12.sc.us

Fundamentals of Evolution

• Variation

• Inheritance

• Selection

• Time

• Speciation

Image source: http://images.sciencedaily.com

Fundamentals of Evolution

• Variation

• Inheritance

• Selection

• Time

• Speciation

Image source: http://www.nature.com

Evolution and Tectonics

Evolution + Tectonics

Tectonic theoryGenetic isolation

SpeciationExamples

Tectonic Theory• Earth’s layered

structure

• Crust made of slow-moving plates

• Land masses migrate over time

• new climate patterns

• isolate organisms

Tectonic Theory• Earth’s layered

structure

• Crust made of slow-moving plates

• Land masses migrate over time

• new climate patterns

• isolate organisms

Tectonic Theory• Earth’s layered

structure

• Crust made of slow-moving plates

• Land masses migrate over time

• new climate patterns

• isolate organisms

Tectonic Theory• Earth’s layered

structure

• Crust made of slow-moving plates

• Land masses migrate over time

• new climate patterns

• isolate organisms

Tectonic Theory• Earth’s layered

structure

• Crust made of slow-moving plates

• Land masses migrate over time

• new climate patterns

• isolate organisms

Speciation• Population isolated

• Different conditions in each place = different selection

• Different adaptations to different environments

• Different enough = can’t interbreed = new species

Speciation• Population isolated

• Different conditions in each place = different selection

• Different adaptations to different environments

• Different enough = can’t interbreed = new species

Speciation• Population isolated

• Different conditions in each place = different selection

• Different adaptations to different environments

• Different enough = can’t interbreed = new species

Evidence of Evolution

Evidence of

EvolutionBiochemical processes

mtDNAPhylogeny

Fossil recordGeographic distributionPresent-day examples

Evidence of Evolution• Biochemical

processes

• mtDNA

• phylogeny

• fossil record

• geographic distribution

• present-day examples

Evidence of Evolution• Biochemical

processes

• mtDNA

• phylogeny

• fossil record

• geographic distribution

• present-day examples