BIOL 100 Lecture Notes - Lecture 15: Speciation, Founder Effect, Mutation
Document Summary
More offspring are produced then can be supported by the environment. Some individuals because of their particular trait have higher fitness than other individuals lacking the trait. Species are not fixed entities but instead are constantly undergoing modification and change. On the origin of species by means of natural selection-charles darwin (1859) Perceived natural selection as primary force driving descent with modification. He had insights and knowledge acquired from others. >believed in competition and the effect of competition. Geological features are the product of physical, chemical, and biological processes through long periods of time. >he believed that over time an organism could acquire enough changes that one species could diverge into two. >also believed organisms change form over generations through inheritance of acquired characters. ~necks got longer and then they pass the trait for longer necks to their offspring. >mutations are only means by which new genetic information is generated.
