2. How Did Other Scientists Influence Darwin’s Thinking? Hw: Rd 418 -422 Q 1-4 p 422

3. Darwin was influenced by other scientists. James Hutton Charles Lyell Thomas Malthus Jean-Baptiste Lamarck

4. James Hutton Geologist 1795 Theory about how geological forces have shaped the Earth These geological processes operate very slowly over time The Earth must be millions of years old

5. Charles Lyell Principles of Geology Forces that shaped the Earth millions of years earlier continue in the present. If the Earth could change over time, might life change as well?

6. Thomas Malthus English economist In 1798 he noticed that babies were being born faster than people were dying Believed that if the human population continued to grow unchecked, sooner or later there would be insufficient food and living space for everybody

7. Jean-Baptiste Lamarck

8. Lamarck’s Theory of Evolution Tendency Towards Perfection – Organisms strive to get better Use and Disuse – Organisms could alter the size and shape of their organs by using them in different ways Inheritance of acquired traits – Organisms that altered their organs could pass those traits down to their offspring Lamarck was wrong because organisms cannot pass acquired characteristics onto their offspring.