BIO-0013 Chapter Notes - Chapter 1: Phylogenetic Tree, Ribosomal Rna, Transfer Rna
16 Sep 2016
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Scientific theories: find pattern in natural world, describe mechanism responsible for pattern. All cells come from other cells hypothesis: louis pasteur. 2 treatments: broth exposed to preexisting cells, broth not exposed. All cells in multicellular organisms are connected by common ancestry. Chapter 1. 3: theory of evolution by natural selection. Evolution: change in characteristics of populations over time: pattern, species related by common ancestry, descent with modification: characters of species modified from generation to generation. Natural selection: process whereby organisms better adapted to environment survive and produce more offspring: process: a. Individuals within populations vary in heritable traits: certain versions of heritable traits help individuals survive/reproduce. *natural selection acts on individuals, evolution change occurs in populations. Cell theory and theory of evolution: cell is fundamental structural unit in all organisms, all species related by common ancestry + have changed over time in response to natural selection. Natural selectionpopulations diverge + create new species: speciation.
