If, in each generation, populations of organisms modify their local environment only idiosyncratically or inconsistently, then there will be no modification of natural selection pressures and, hence, no significant evolutionary consequence. (discovermagazine.com)
Moreover, they are up against overwhelming natural selection pressures: powerful antibiotics that kill off all but the hardiest microbial mutants. (discovermagazine.com)
This repeated outcome of evolution is best interpreted as evidence for similar adaptation to similar Darwinian natural selection pressure — and suggests somewhat deterministic evolutionary trajectories. (sciencedaily.com)