eLearning Connection (See related pages) Concepts Questions Media Resources 27.1 Evidence of Evolution Many fields of biology provide evidence that common descent has occurred. 1. List the categories of evidence in support of evolution. Answer 2. How long have unicellular prokaryotes existed compared to multicellular eukaryotes? Answer Essential Study Partner Evidence for Evolution Geologic Time Fossils Continental Drift Extinctions Geologic Processes Art Quizzes Embryos and Evolutionary History Cytochrome c Evolution Phylogenetic Tree of Globin Gene Animation Quizzes Plate Tectonics Molecular Clock General Biology Weblinks Evolutionary Biology 27.2 Origin of Life A chemical evolution proceeded from small organic molecules to macromolecules to protocell(s). The first cell was bounded by a membrane and contained a replicating system, that is, DNA, RNA, and proteins. 3. How was the primitive atmosphere, that allowed for the evolution of simple organic molecules, different from the atmosphere of earth today? Answer 4. Considering the origin of cells, which likely arose first - autotroph or heterotroph? Answer Essential Study Partner Origin of Life Key Events Art Quizzes Miller-Urey Experiment Miller-Urey Experiment Results Current Bubble Hypothesis 27.3 Process of Evolution Populations evolve and not individuals; evolution is defined in terms of population genetic changes. There are several agents of evolutionary change, one of which is natural selection. Natural selection is the mechanism resulting in adaptation to the environment. 5. List the five agents of evolutionary change. Answer 6. How do pesticides and antibiotics lead to resistant insects and bacteria, respectively? Answer Essential Study Partner Natural Selection Types of Selection Variation Adaptation Other Processes Before Darwin Voyage of the Beagle Art Quizzes Hardy-Weinberg Equilibrium Types of Natural Selection Evolutionary Pace Correlation Between Sickle Cell Allele and Malaria Animation Quiz Hardy-Weinberg Equilibrium Study Guide Evolution I: Microevolution and Selection 27.4 Speciation New species come about when populations are reproductively isolated from other similar populations. Species are classified into seven hierarchical categories according to shared characteristics. At each level above species, there are more and more types of species in the category. 7. How do subpopulations become separate species? Answer 8. What are the two hypotheses about the pace of evolution and how do they differ? Answer Essential Study Partner Introduction Allopatric Speciation Sympatric Speciation Hierarchies Kingdoms Three Domains Constructing Phylogenies Art Quizzes Taxonomic Hierarchy Traditional Versus Cladistic Taxomony Tree of Life Evolutionary Relationships Among Kingdoms General Biology Weblinks Taxonomy & Phylogenetics
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