BIO SCI 55 Chapter Notes - Chapter 9: Evolution, Species Evenness, Biome
17 Nov 2017
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Utilitarian: a species provides a product that is of direct value to people. Public service: nature provides a service that we cannot do ourselves like taking up carbon dioxide. Ecological: the fact that species have roles in their ecosystems and are needed for the ecosystem to exist. Theological: some religions value nature and its diversity. Each gene carries a single piece of inherited info from one generation to the next, creating a genotype, the genetic makeup that is characteristic of an individual or a group. Individuals with mutations are so different from their parents that they cannot produce with normal offspring of their species, so a new species has been created. Natural selection: organisms whose biological characteristics make them better able to survive and reproduce in their environment leave more offspring than others. In summary natural selection involves 4 primary factors:
