adaptations defined: any trait that aids the chances of survival and reproduction increases an...
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AdaptationsAdaptations DefinedDefined: Any trait that : Any trait that
aids the chances of aids the chances of survival and reproductionsurvival and reproduction
Increases an organisms Increases an organisms fitness to the environmentfitness to the environment
Increases the probability Increases the probability of passing genes to the of passing genes to the next generationnext generation
Ex: Broad leaves (forests) Ex: Broad leaves (forests) vs. Pointed needles vs. Pointed needles (deserts)(deserts)
Variation vs. AdaptationVariation vs. AdaptationVariationVariation: differences : differences that occur in a populationthat occur in a populationEx: Cats can have long, Ex: Cats can have long, sharp claws or short, dull sharp claws or short, dull clawsclawsHarmful variationHarmful variation: Short, : Short, dull claws reduce fitnessdull claws reduce fitnessHelpful variationHelpful variation: Long, : Long, sharp claws are more sharp claws are more likely to be passed onlikely to be passed onVariations can lead to Variations can lead to adaptationsadaptations
Complex AdaptationsComplex Adaptations Evolution is a slow processEvolution is a slow process Complex traits all started very Complex traits all started very
simplesimple Random variations continued to Random variations continued to
modify certain traitsmodify certain traits Ex: At first, eyes were a group of Ex: At first, eyes were a group of
light sensitive cellslight sensitive cells Over time, variationsOver time, variations
have lead tohave lead to
adaptationsadaptations
Structural Structural AdaptationsAdaptations
DefinedDefined: : Adaptations Adaptations involving structure or involving structure or anatomyanatomy
Ex: Anteater tongue Ex: Anteater tongue (long & sticky)(long & sticky)
Ex: Angler fish lureEx: Angler fish lure Ex: Bird beaks for Ex: Bird beaks for
different dietsdifferent diets
Physiological AdaptationsPhysiological AdaptationsDefinedDefined: Chemical : Chemical adaptationsadaptations
Ex: Poisonous snake Ex: Poisonous snake venomvenom
Ex: Octopus ink for Ex: Octopus ink for protectionprotection
Ex: FungusEx: Fungus
antibioticsantibiotics
for protectionfor protection
Behavioral AdaptationsBehavioral Adaptations
DefinedDefined: Adaptations that respond to their : Adaptations that respond to their environmentenvironment
Ex: Nocturnal habits (being active at night Ex: Nocturnal habits (being active at night decreases predator risk)decreases predator risk)
Ex: Migration (allows a constant food supply)Ex: Migration (allows a constant food supply)
Interactions of AdaptationsInteractions of Adaptations
Adaptations depend upon other adaptationsAdaptations depend upon other adaptations Ex: Act of MigrationEx: Act of Migration BehavioralBehavioral: instincts of know when to migrate: instincts of know when to migrate StructuralStructural: light, hollow bones and feathers: light, hollow bones and feathers PhysiologicalPhysiological: constant, steady production of : constant, steady production of
ATPATP
Name this Adaptation!
• Wildebeest moving in herds for safety
Name this Adaptation!
• Poison dart frogs secrete toxins to prevent being eaten.
Name this Adaptation!
• Teeth have different shapes for different functions (tearing, grinding)
Quick ReviewQuick ReviewAdaptations are traits that aid Adaptations are traits that aid
survivalsurvivalVariations (differences) lead to Variations (differences) lead to
adaptationsadaptationsAdaptations are passed from Adaptations are passed from
one generation to the nextone generation to the next