BIOL 1202 Chapter : Chapter Learning Objectives Chp 22
Document Summary
Chapter 22: descent with modification: a darwinian view of life. Cuvier speculated that each boundary between strata represented a catastrophe, such as a flood. He proposed that these periodic catastrophes were usually confined to local regions, which were late r repopulated by different species immigrating from other regions: gradualism, uniformitarianism (charles lyell incorporated with hutton"s thinking)- Descendants of the ancestral organism lived in various habitats over millions of years, they accumulated diverse modifications, or adaptations, that fit them to specific ways of life. It is the population that evolves over time. In each location, the fruit of the introduced plants is larger than the fruit of the native plant. The researchers predicted that natural selection would result in the evolution of longer beak length. Darwin"s theory of natural selection: homologous structures- variations on a structural theme that was present in their common ancestor, what observations have been made regarding the fossil record.
