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.
19. Why is it said that evolution acts on phenotypes and not genotypes? Selection acts on phenotypes because differential reproduction and survivorship depend on phenotype. The relative fitness measure is a dynamic assessment subject to co-evolving population.