Evolution  “Change over time”  Process by which modern organisms have descended from ancient organisms.

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Presentation transcript:

Evolution  “Change over time”  Process by which modern organisms have descended from ancient organisms

Charles DarwinCharles Darwin  Made observations and collected evidence that led him to hypothesize about the way life changed over time

Voyage of the BeagleVoyage of the Beagle

Darwin’s AdventuresDarwin’s Adventures  Darwin saw plants/animals and took notes  Noted how well they were suited to their specific environment  Had visited similar environments but did not see same species (Example: Argentina and Australia)  Collected Fossils

Galapagos IslandsGalapagos Islands  Close together, but different islands  Smallest were hot dry and barren  Largest greater rainfall

Shape of ShellsShape of Shells  Tortoises  Shell shape could determine which island the tortoises inhabited

Birds of GalapagosBirds of Galapagos  Finches  Collected finches and studied their beaks

Which finches could “spear” an insect? Which finches could crack big seeds? Which finches could pry seeds from cactus?

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