Presentation on theme: "Standard VI-1, part 3- Adaptations"— Presentation transcript:
1 Standard VI-1, part 3- Adaptations Science AHSGEStandard VI-1, part 3- Adaptations
2 Forerunner of Evolution Jean-Baptiste Lamarck- Theory of “Inheritance of Acquired Traits”Believed organisms changed behavior as a result of an environmental changeAs a result, physical changes followed with time which could then be inheritedIncorrect, but on the right track!
3 EvolutionChanges in an organism over time known to occur due to fossilsAdaptation- Evolution of a structural, internal or behavioral feature to better suit the organism for survivalResults from a change in the environmentTheory of Natural SelectionSurvival of the fittest- organisms with the best genes survive and pass them onCauses a change in the gene poolUnfit genes die out or are bred out
4 EvolutionDivergent Evolution- Development of more than one species from a common ancestorEx: All dog breeds have been selectively bred from the wolfConvergent Evolution- Development of a common characteristic by more than one unrelated species due to living in similar environmentsEx: Arctic mammals all have white winter coats
5 Structural Adaptations Mimicry- Copying of the appearance of other organisms for protection or other advantagesProtective resemblance- Normally resembles plant structuresCamouflage- Body color blends in with surroundingsSpots and stripes break up body patternWarning Coloration- Bright coloration to warn of dangerMechanical Defenses- Physical covering that allows for defending from predators or to aid in predationEx: Claws, sharp teeth, quills, shells, etc.
7 Adaptations Charles Darwin Father of evolution Developed theory of natural selectionTraveled on the H.M.S. Beagle to the Galapogos IslandsStudied finches and beak size and shapeBeaks of birds are adaptations for food type
10 Bird Wing AdaptationsPenguin wing adapted for swimming
11 Behavioral Adaptations Migration- Movement of an animal from one place to anotherCommon in birds and grazing mammalsBrought on by climate changeHibernation- Period of dormancy during certain time-periodsCommon in reptiles and mammals of cold climates