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Ideas About Ideas About EvolutionEvolution
Ideas About Ideas About EvolutionEvolution
Describe Lamarck’s hypothesis of acquired Describe Lamarck’s hypothesis of acquired characteristics and Darwin’s theory of characteristics and Darwin’s theory of
natural selection.natural selection.
Describe Lamarck’s hypothesis of acquired Describe Lamarck’s hypothesis of acquired characteristics and Darwin’s theory of characteristics and Darwin’s theory of
natural selection.natural selection.
Identify why variations in organisms are Identify why variations in organisms are important.important.
Identify why variations in organisms are Identify why variations in organisms are important.important.
Compare and contrast gradualism and Compare and contrast gradualism and punctuated equilibriumpunctuated equilibrium
Compare and contrast gradualism and Compare and contrast gradualism and punctuated equilibriumpunctuated equilibrium
Early Models of Evolution
group of organisms that share similar characteristics and can reproduce among themselves, producing fertile offspring
change in inherited characteristics over time
process by which organisms with traits best suited to their environment are more likely to survive and reproduce
inherited trait that makes an individual different from other members of the species
any variation that makes an organism better suited to its environment
SPECIES
EVOLUTION
NATURALSELECTION
VARIATION
ADAPTATION
LamarckismLamarckismLamarckismLamarckism
Characteristics developed during a parent’s Characteristics developed during a parent’s lifetime are inherited by the offspring. lifetime are inherited by the offspring.
Evidence does not support this.Evidence does not support this.
Characteristics developed during a parent’s Characteristics developed during a parent’s lifetime are inherited by the offspring. lifetime are inherited by the offspring.
Evidence does not support this.Evidence does not support this.
Darwin’s FinchesDarwin’s FinchesDarwin’s FinchesDarwin’s Finches
Darwin’s FinchesDarwin’s FinchesDarwin’s FinchesDarwin’s FinchesThe Galapagos finches ______________________ for food. Those The Galapagos finches ______________________ for food. Those that had that had _____________________, ______________________ that allowed them to _____________________, ______________________ that allowed them to get foodget foodwere able to _________________ longer and _____________________ were able to _________________ longer and _____________________ more.more.Over time, groups of finches became separate Over time, groups of finches became separate ___________________.___________________.
The Galapagos finches ______________________ for food. Those The Galapagos finches ______________________ for food. Those that had that had _____________________, ______________________ that allowed them to _____________________, ______________________ that allowed them to get foodget foodwere able to _________________ longer and _____________________ were able to _________________ longer and _____________________ more.more.Over time, groups of finches became separate Over time, groups of finches became separate ___________________.___________________.
competedcompeted
advantagesadvantages beak shapesbeak shapes
survivesurvive reproducereproduce
speciesspecies
Darwin’s 5 Principles of Natural Darwin’s 5 Principles of Natural SelectionSelection
Darwin’s 5 Principles of Natural Darwin’s 5 Principles of Natural SelectionSelection
1. Organisms produce more offspring than 1. Organisms produce more offspring than can survivecan survive1. Organisms produce more offspring than 1. Organisms produce more offspring than can survivecan survive
2. Differences, or variations, occur among 2. Differences, or variations, occur among individuals of a speciesindividuals of a species2. Differences, or variations, occur among 2. Differences, or variations, occur among individuals of a speciesindividuals of a species
3. Some variations are passed to offspring3. Some variations are passed to offspring3. Some variations are passed to offspring3. Some variations are passed to offspring
4. Some variations are helpful. Those with helpful 4. Some variations are helpful. Those with helpful variationsvariations survive and reproduce better.survive and reproduce better.
4. Some variations are helpful. Those with helpful 4. Some variations are helpful. Those with helpful variationsvariations survive and reproduce better.survive and reproduce better.
5. Over time, offspring of individuals with helpful 5. Over time, offspring of individuals with helpful variations makevariations make up more of a population and may become a new up more of a population and may become a new species.species.
5. Over time, offspring of individuals with helpful 5. Over time, offspring of individuals with helpful variations makevariations make up more of a population and may become a new up more of a population and may become a new species.species.
Variation vs. Variation vs. AdaptationAdaptation
Variation vs. Variation vs. AdaptationAdaptation
Variation vs. Adaptation
Variation vs. Adaptation
VARIATION ADAPTATION
DEFINITIONAN INHERITED TRAIT THAT MAKES AN INDIVIDUAL DIFFERENT FROM OTHER
MEMBERS OF ITS SPECIES
ANY VARIATION THAT MAKES AN ORGANISM BETTER SUITED TO ITS
ENVIRONMENT
EXAMPLES
Black Black skinskinBlack Black skinskin
Two layers of Two layers of furfurTwo layers of Two layers of furfur
Webbed Webbed feetfeetWebbed Webbed feetfeet
Sensitive Sensitive nosenoseSensitive Sensitive nosenose
Small Small earsearsSmall Small earsears
Long Long clawsclawsLong Long clawsclaws
Polar BearPolar BearPolar BearPolar Bear
http://www.youtube.com/watch?v=pgDE2DOICuc
Cuttlefish Cuttlefish camouflagecamouflageCuttlefish Cuttlefish
camouflagecamouflage
WHAT HAPPENSHOW IT LEADS TO
CHANGE
CHANGES IN GENE SOURCES
OVER TIME, GENETIC MAKEUP OF A SPECIES
MAY CHANGE
WHEN NEW INDIVIDUALS ENTER AN AREA
THEY CAN BRING IN DIFFERENTGENES AND VARIATIONS
GEOGRAPHICISOLATION
MOUNTAINS AND LAKES CAN ISOLATEINDIVIDUALS FROM THE POPULATION
OVER SEVERAL GENERATIONS, VARIATIONS
NOT COMMON IN LARGE POPULATIONMAY BECOME COMMON IN ISOLATED
POPULATION
Variation vs. Variation vs. AdaptationAdaptation
Variation vs. Variation vs. AdaptationAdaptation
http://www.youtube.com/watch?v=MAZfEdthTlo
Gradualism vs Punctuated Gradualism vs Punctuated EquilibriumEquilibrium
Gradualism vs Punctuated Gradualism vs Punctuated EquilibriumEquilibrium
Slow, ongoing Slow, ongoing processprocess
Slow, ongoing Slow, ongoing processprocess
Continuous Continuous seriesseries
of mutationsof mutations
Continuous Continuous seriesseries
of mutationsof mutations
Intermediary Intermediary forms - gradual forms - gradual
changechange
Intermediary Intermediary forms - gradual forms - gradual
changechange
Rapid change Rapid change with few with few
mutationsmutations
Rapid change Rapid change with few with few
mutationsmutations
Bacteria can Bacteria can changechange
in just a fewin just a fewgenerationsgenerations
Bacteria can Bacteria can changechange
in just a fewin just a fewgenerationsgenerations
Both showBoth showevolutionevolution
Both showBoth showevolutionevolution
Clues About Clues About EvolutionEvolution
Clues About Clues About EvolutionEvolution
Identify the importance of fossils as Identify the importance of fossils as evidence of evolutionevidence of evolution
Identify the importance of fossils as Identify the importance of fossils as evidence of evolutionevidence of evolution
Explain how relative and radiometric dating Explain how relative and radiometric dating are used to estimate the age of fossilsare used to estimate the age of fossils
Explain how relative and radiometric dating Explain how relative and radiometric dating are used to estimate the age of fossilsare used to estimate the age of fossils
List examples of five types of evidence for List examples of five types of evidence for evolutionevolution
List examples of five types of evidence for List examples of five types of evidence for evolutionevolution
Clues About Evolution
a type of rock made from pieces of other rocks, minerals deposited from a solution, or plant and animal matter
SEDIMENTARYROCK
element that gives off a steady amount of radiation as it slowly changes to a nonradioactive element
RADIOACTIVEELEMENT
study of embryos and their developmentEMBRYOLOGY
similar in structure, origin or function
structure that does not seem to have a function and that may have functioned in the body of an ancestor
HOMOLOGOUS
VESTIGIAL
Green River FormationGreen River FormationGreen River FormationGreen River Formation
Green River FormationGreen River FormationGreen River FormationGreen River Formation
Clues About Clues About EvolutionEvolution
Clues About Clues About EvolutionEvolution
InformatiInformationon
obtained obtained fromfrom
fossilsfossils
Relative Relative age of age of
the rocksthe rocks
Habits Habits and and
behaviors behaviors of ancient of ancient
lifelife
Show Show what what
organismorganisms looked s looked
likelike
Show that Show that evolution evolution
has has happenedhappened
Relative DatingRelative DatingRelative DatingRelative Dating
Youngest
Oldest
Relative DatingRelative DatingRelative DatingRelative Dating
Clues About Clues About EvolutionEvolution
Clues About Clues About EvolutionEvolution
Other Other clues clues about about
evolutionevolution
EmbryoloEmbryologygy
Vestigial Vestigial StructureStructure
ss
HomologHomologous ous
StructureStructuress
DNADNA
EmbryologyEmbryologyEmbryologyEmbryology
Homologous Homologous StructuresStructures
Homologous Homologous StructuresStructures
Convergent Convergent EvolutionEvolution
Convergent Convergent EvolutionEvolution
Vestigial Vestigial StructuresStructuresVestigial Vestigial
StructuresStructures