BIO 121 Lecture Notes - Lecture 2: Georges Cuvier, Rock Dove, Selective Breeding
8 Dec 2020
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George cuvier: extensive study of fossils (ancient animals were similar, not identical to modern ones) Charles lyell: uniformitarianism, same processes that happen now have been happening for a while. Thomas malthus: population growth is limited by resources; more individuals produced = competition. Bred pigeon varieties, derived from ancestral rock pigeon. Huge possible variety exists; many different varieties can be bred traits are inherited, offspring resemble parents. Species can change through time (lamarck, geoffroy, cuvier fossil) Gradual change, uniform change, mark most of geological time (lyell) Struggle for existence(malthus) :survival of the fittest. Variety within species in nature (darwin"s voyage, artificial selection) Offspring inherit traits from their parents (artificial selection) All life is descended from a common ancestor. Those that survive are more likely to possess traits that enhance survival. Species evolve traits that best help them to survive in their environment. Linnaeus: pioneered the practice of nested (limited) similarities, but didn"t believe in evolution, cataloged organisms.
