BIOL 226 Lecture Notes - Lecture 2: Selective Breeding, Moodle, Sugar Glider
27 Oct 2015
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Descent with modification: a darwinian view of life. Definitions, explanations or lists (answer as part of your notes: not to be submitted) Write down the 3 key concepts of the chapter. The darwinian revolution challenged traditional views of a young earth inhabited by unchanging species. Descent with modification by natural selection explains the adaptations of organisms and the unity and diversity of life. Evolution is supported by an overwhelming amount of scientific evidence. Evolution is described as descent with modification, a phrase darwin used in proposing that earth"s many species are descendants of ancestral species that were different from the present-day species. Evolution can also be defined more narrowly as a change in the genetic composition of a population from generation to generation. scala naturae (linear hierarchy) Aristotle (384-322 bce), viewed species as fixed (unchanging). Through his observations of nature, aristotle recognized certain affinities among organisms.
