What evolves during natural selection

Answer 1

During natural selection, populations of organisms evolve. This means that the traits and characteristics of individuals within a population change over time in response to their environment and the selective pressures acting upon them. Individuals with traits that are better adapted to their environment have higher survival and reproductive success, and their genes are passed on to future generations. Gradually, over many generations, these advantageous traits become more common in the population, while less favorable traits may become less common or even disappear. Thus, natural selection leads to the evolution of populations as a whole.