New payment models may ultimately prove to be the best option to systematically improve payment for primary care, but there is an uncertain track record with them, and the investment in the practice that is required makes for an uncertain and uneasy cost-benefit for primary care physicians.
Sexual reproduction is most advantageous , due to genetic variation . Meiosis plays an important part in sexual reproduction. During meioisis , after synapsis , genetic recombination occurs , dure to which we get varied gene pairs as well parental strands too .
Two general explanations for the overwhelming prevalence of sexually-reproducing species over asexual ones are: 1  Perhaps sexual reproduction has kept in style because it provides a mechanism to weed out (through the recombination process of meiosis) harmful mutations that arise in the population reducing its fitness.