Natural selection is a gradual, nonrandom process by which biological traits become more or less frequent within a population. which of the following are necessary conditions for natural selection to occur within a population of staphylococcus aureus? traits that permit an individual to survive at least until reproduction will increase in frequency over time.
there is adaptation.
some individuals in the population reproduce more than others.
traits are hereditary.
some individuals within the population are optimally adapted for survival.
individuals in the population vary from one another.
deleterious (harmful) genes are removed from the population.