1 If you're under 16, it can helpful to bring along a parent or guardian for the initial interview with the people seeking babysitting. 2  This reassures the other parents that your own parents are invested in your success and that you mean business, and it also protects you.
Evolutionary biology. Fitness (often denoted w {\displaystyle w} or Ï in population genetics models) is the quantitative representation of natural and sexual selection within evolutionary biology. It can be defined either with respect to a genotype or to a phenotype in a given environment.
In the popular mind, any reference to Darwin, Darwinism, or evolution calls up the idea of survival of the fittest, which is generally understood to mean relentless and ruthless competition in which the strong prevail over the weak--might makes right..