The swing of a crinoline by Leech and the curl of a cabdriver's hat brim by Keene were perfect selective imitation, themselves almost inimitable; the crinoline and the hat are gone with those who knew how to wear them, but the picture in Punch remains.
Thus, effects of somatic mutations are not misinterpreted by comparing them to the germline variants that can be under selective pressures themselves.
However, more epidemiologically rigorous samples of post-PCV7 population structures (Moore et al. 2008; Mahjoub-Messai et al. 2009; Song et al. 2009; Beall et al. 2011; Hanage, Bishop, Lee, et al. 2011) and the MLST database itself (Aanensen and Spratt 2005) suggest that although the initial selective sweeps themselves may be soft, subsequent competition leads to one mutant genotype prevailing.
Keep in mind that in some years high schools have unusually strong senior classes, and also some high schools have selective admission policies themselves.
What happens when the children themselves become selective?
Yet the only arguments for a selective school system are themselves based on emotion, dogma and ideology.
What's different enough that one (Chinese-American) parent can now reasonably call the school district's academic culture an "arms race"—lies in the colleges themselves, especially selective and prestigious ones.
What's different — enough that one (Chinese-American) parent can now reasonably call the school district's academic culture an "arms race" — lies in the colleges themselves, especially selective and prestigious ones.
Strikingly, the initiation factor isoforms are themselves mRNA selective.
Analysis of neuronal connectivity using large-scale electron microscopy has demonstrated that this computation involves asymmetric connections with a specific type of inhibitory interneuron, the starburst amacrine cell (Briggman et al., 2011), which has dendrites that are themselves directionally selective (Hausselt et al., 2007; Yonehara et al., 2013).
