Although the resulting strains are hardly Don Giovanni, the finding shows how users' tastes exert their own kind of natural selection, nudging tunes to evolve out of noise.
Wendy Johnston and colleagues of the Massachusetts Institute of Technology MITT) in Cambridge exerted their own "unnatural selection" process on a collection of randomized RNA molecules.
Parasites exert strong selection on their hosts to evolve resistance mechanisms that avoid or reduce the negative fitness consequences of infection.
The central importance of pollen for the bee life cycle should exert strong selection on their ability to locate the most rewarding sources of pollen.
Thus, whether or not predators exert different selection pressures on their prey can only be answered by looking directly and in detail at the species in question.
It remains possible that editors exert a style effect through their selection of specific reviewers.
Fluctuations in abundance of thrushes must have affected their capacity to exert selection on the snails.
Pathogens can exert strong natural selection on their hosts.
Such therapies should exert minimal selection pressure on organisms, thus greatly decreasing the probability of pathogen resistance developing.
Alternating wet and dry phases exert strong selection that imposes trade-offs and leads to multiple strategies for spreading risk through space and time.
