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A Voyage of Discovery Learning Objectives ▪ Identify Charles Darwin’s contribution to science. ▪ Describe the three patterns of biodiversity noted by Darwin. Darwin’s Epic Journey Observations Aboard the Beagle Species Vary Globally Darwin noticed that different, yet ecologically similar, species inhabited separated, but ecologically similar, habitats around the globe. Species Vary Locally Species Vary Over Time Ideas That Influenced Darwin Learning Objectives ▪ Identify the conclusions drawn by Hutton and Lyell about Earth’s history. ▪ Describe Lamarck’s hypothesis of evolution. ▪ Describe Malthus’s view of population growth. ▪ Explain the role of inherited variation in artificial selection. An Ancient, Changing Earth Geologists James Hutton and Charles Lyell concluded that Earth is ancient and still changing. Hutton and Geological Change Lyell’s Principles of Geology Lamarck’s Evolutionary Hypotheses Jean-Baptiste Lamarck was one of the first naturalists to argue strongly that species are not fixed. Population Growth Thomas Malthus reasoned that if the human population grew unchecked, there wouldn’t be enough living space and food for everyone. Artificial Selection Darwin’s Theory: Natural Selection Learning Objectives ▪ Describe the conditions for natural selection. ▪ Explain what evolutionary theory suggests about the unity and diversity of life. Evolution by Natural Selection ▪ ▪ ▪ ▪ The struggle for existence Variation and adaptation Survival of the fittest Natural selection Natural Selection Common Ancestry
