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A summary of the key ideas on the development of evolution by natural selection for my grade 10 general science class.
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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