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16.1 – Darwin’s Voyage of Discovery WARM UP 2/11 What continent was Darwin commissioned to study? After his journey Darwin analyzed all of his data and observation: What book did he write as a result? What three patterns of biodiversity did Darwin note: List all three Explain Provide an example
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16.1 – Darwin’s Voyage of Discovery Chapter 16: Darwin’s Theory of Evolution
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16.1 – Darwin’s Voyage of Discovery THINK ABOUT IT!!! Charles Darwin was average everyday adolescent. Yet Charles would one day come up with one of the most important scientific theories of all time.
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16.1 – Darwin’s Voyage of Discovery Darwin’s History Born in England on February 12, 1809 At 22 years old and a college grad he was asked to study nature off the South American Coastline His thinking changed as he collected more data Wrote a book about his observations On the Origin of Species Darwin video clips Darwin video clips
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16.1 – Darwin’s Voyage of Discovery Darwin’s Epic Journey Sailed on the HMS Beagle’s for five years mapping the coastline of South America. Darwin collected plant and animal specimen while on the voyage.
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16.1 – Darwin’s Voyage of Discovery Observations Aboard the Beagle He filled notebooks with detailed observations about the characteristics and habitats of the different species he saw. Wanted to explain the biological diversity he observed. He used patterns to explain his observations. What three patterns of biodiversity did Darwin note? Species Vary Globally Species Vary Locally Species Vary Over Time
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16.1 – Darwin’s Voyage of Discovery Darwin’s Three Patterns of Biodiversity Species Vary Globally Different, yet ecologically similar, animal species inhabited separated, but ecologically similar, habitats around the globe. Example: Different flight less bird species in grassland habitats on several different continents. Emu = Australia Rhea = South America Ostrich = Africa
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16.1 – Darwin’s Voyage of Discovery Darwin’s Three Patterns of Biodiversity Species Vary Locally Different, yet related, animal species often occupied different habitats within a local area. Example: Different species of tortoises in the Galapagos islands. *Same local area - different islands - different species of tortoises.* Also Darwin’s Finches!!
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16.1 – Darwin’s Voyage of Discovery Darwin’s Three Patterns of Biodiversity Species Vary Locally Activity: Use the following description of each island environment to sketch a picture of what a tortoise that is well adapted would look like. Galapagos Islands Hood Island Tortoise – Dry climate, little vegetation that is on shrubs higher off the ground, Isabela Island – Rainy climate, lots of vegetation close to the ground, many volcanic mountains
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16.1 – Darwin’s Voyage of Discovery Darwin’s Three Patterns of Biodiversity Hood Island Isabela Island
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16.1 – Darwin’s Voyage of Discovery Darwin’s Three Patterns of Biodiversity Species Vary Over Time Darwin noticed that some fossils of extinct animals were similar to living species. Example: Darwin observed that some fossils resembled currently living species in that area. Glyptodont Vs. Armadillo
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16.1 – Darwin’s Voyage of Discovery
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Putting the Pieces of the Puzzle Together Considered that Galápagos species might have evolved from South American ancestors. Galapagos island finches resembled species from the South American mainland He worked for years on his ideas about species and evolution. Evidence suggested that species are not fixed and some process causes the change.
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16.1 – Darwin’s Voyage of Discovery Darwin’s Contributions Charles Darwin’s contribution to science: The scientific theory of biological evolution Explains how modern organisms evolved over long periods of time through descent from common ancestors. Evolution The process of change over time.
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