1. 5.1 Darwin’s Voyage A. Darwin’s Bio 1. ________________=person that studies the natural world 2. Traveled for 5 years around the world on a ship=_____________________ 3. Observed that plants and animals were very different compared to the ones found in England. a. Observations lead to development of theory of evolution based on ____________ ________________ B. Darwin's Observations 1. During voyage stopped at a group of Islands a. ______________________islands- off the coast of _____________ _____________ b. Incredible animal diversity - giant tortoises -blue footed booby -Iguana C. Similarities and differences 1. Similarities a. Many of the same kind of _________________ and ________________ 2. Differences a. Iguana - In South America it have _________claws -On the Galapagos have _________claws Once the SA iguanas reached and inhabited the GI they reproduced and eventually, over a long period of time, developed different adaptations and thus became the GI iguanas- a different species. D. Adaptation 1. Pepper moth- color trait, some had dark alleles while others had light alleles for the trait a. Trees had dark bark, due to coal burning, the dark moths blended in escaping predators while the lighter colored moths were found and eaten by the predators thus removing the light colored ______________from the population, but not completely. b. Tree bark returned to lighter color after coal was no longer used, the light colored moths an advantage while the darker moths were found and eaten by the predators thus removing the dark colored ___________from the population, but not completely. E. Evolution 1. _____________________= a well tested concept or idea that explains observations 2. How did he develop this theory? a. Observed that organisms on the Galopagos Islands had slightly different traits=__________________ ______________, compared to the SA organisms, that allowed them to survive in the different surroundings=____________________ b. Species gradually changed over many __________________and became better __________________to the new _____________________ Kind of like selective breeding where you produce organisms with desired traits artificially, although in nature it was done naturally___________________ ________________________. Naturalist HMS Beagle Natural selection Galapagos South America plants animals short long alleles alleles Theory Favorable traits environment generations adapted environment Natural selection