Question

As creatures become adapted to a particular environment, natural selection can cause a decrease in genetic diversity throughout the population. this type of natural selection is

Answer 1

Natural selection favours those individuals (or their phenotypes) that contribute more to the gene pool of the next generation, i.e. that are best adapted to their environment. Mutations form the "fuel", in that they generate genetic variation on which selection can subsequently act. Migration and genetic drift bear on populations ...