BIO152H5 Lecture Notes - Lecture 8: Coevolution, Allele Frequency, Natural Selection
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How does natural selection work: 1. Without differences natural selection is noting to work on. Individuals in a population vary in inherited traits they possess: 2. Overpopulation of offspring: result in competition; only some individuals reach maturity and reproduce while others do not survive or reproduce. Example: if heritable variations: color varies among individuals primarily because of differences in their genotype. Bird picks off the ones that are easier to see black ones on a white background are victims of predation. Evolution: evolution: changes in genetic structure of a population over time. What is meant by success with regard to the organisms that live on this planet: 1. Behaviors, physiological processes that help organisms survive and reproduce in a particular environment: 2. Some groups of organisms are more successful than others in the number of. Natural selection vs. artificial selection species in that group: all are non-domesticated, external features: ears, 4 legs, well adapted for running, speed, elongated bodies.
