Traffic to consumer electronics sites jumped 46% over the holiday, with the increase largely due to the fact that the category now has much bigger and accessible product selection than ever before.
Differences in the structure of P between these central and marginal populations indicate that a unique subset of phenotypic space is accessible to selection in these marginal populations [ 16].
This conclusion reverberates with the results of recent studies on experimental evolution of enzyme fitness which demonstrated that, among the multitude of possible mutational trajectories, only a small fraction is accessible to selection [ 20].
The individual transimination and transamination equilibria of model compound 5 were easily accessible by selection of the reagent, and represent two orthogonal reversible reaction pathways in the dynamic covalent reaction network.
Twenty titles will be available to U.S. users at the launch of Miramax's "eXperience" Facebook app, including Chicago, Good Will Hunting, Clerks, Could Mountain, and Gangs of New York, with a more limited selection accessible to users in the UK and Turkey.
Mutations in regulatory regions are usually co-dominant [34], [35] and hence are readily accessible to natural selection in contrast with the recessive nature of mutations in coding regions.
In all they found that for only a relatively small fraction (15%, 18/120) of possible pathways, all five steps increased resistance, suggesting that a relatively small number of possible pathways are accessible to natural selection.
Out of 18 billion possible orders of single mutations leading from non-resistant to fully-resistant form, they found that only 27 (1.5×10−7%) pathways were characterized by consistently increasing resistance, thus only a tiny fraction of possible paths are accessible by positive selection.
The gene pool for antimicrobial resistance has never been so accessible, nor its selection pressure so strong.
