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Stanford Encyclopedia of Philosophy: units and levels of
(1979). That different researchers reach such disparate conclusions about the efficacy of group selection is partly because they are using different models with different parameter values. Wade highlighted several assumptions, routinely used in group selection models, that bias...
Stanford Encyclopedia of Philosophy: evolutionary
‘invalidates’ Wright's Shifting Balance Theory of Evolution, which he referred to as ‘far-fetched’. Interestingly, Ford and his colleagues believed that genetic subdivision of the sort postulated by Wright would promote rapid evolution but for very different ...
Natural Selection: How Evolution Works
evolutionary change. It happens entirely by chance, by random fluctuations. That is what we call the process of genetic drift. Genetic drift is very different from possibility number two, natural selection, which is a much more consistent, predictable, dependable change in the p...
InterventionCentral
collection of RTI resources for educators including discussion boards, an “ask the experts” feature, professional development tools, podcasts, webinars, and many more resources broken down by grade level. What Works Clearinghouse Practice Guides Practice guides provide pr...
Bioinformatics: Life Science Research in Silico
of DNA sequences present in any database these days, this task may take months, or even years, if it is done manually. Computers, on the other hand, can perform this task efficiently. One frequently used tool to search for similar sequences in a database is called BLAST (Basic Local A...
Genetic Counselors
professionals who are trained to help families understand genetic disorders and to provide information and support to those families. They may also serve as patient advocates by referring individuals or families to local services that can be of assistance. Genetic research is a...
Evolution: Fact and Theory
arose on Earth several billion years ago. Biochemists, geologists, and physicists seek natural explanations for the origin of life on Earth. While progress has been made in this area, the origin of life remains an interesting, but unanswered, question. When species evolve, their genetic...
Stanford Encyclopedia of Philosophy: quantum computing
unmentioned is that its application to an intractable computational problem may sometimes require solving another, as intractable a task (this general worry was first raised by a philosopher; see Pitowsky 1990). Indeed, Reichardt (2004) has shown that there are simple problems for which the ...
A Science Primer: Molecular Modeling
resemblance to one another, but their identification and assignment to a particular fold is essential for predicting future protein structures using homology modeling. The scientific basis for these theories is that a strong conservation of protein three-dimensional shap...
Stanford Encyclopedia of Philosophy: conservation biology
surrogates in them, inclusion of both in a CAN will likely lead to a loss of economy. The solution is to build a CAN iteratively, one cell at a time, only using the coverage of those surrogates that have not yet met their targets. This rule (which corresponds to the “greedy” al...
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