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.
The basic definition of evolution is a change in the gene pool of a population of organisms over time. All of evolution is based on genetic change.hese facts, that 1) DNA determines the nature of an organism and that 2) there are mechanisms through which DNA can be modified, are the basis of evolution. It is through these facts that evolution happens.