Evolution and natural selection are necessary for a) the preservation of natural habitats. b) the short-term survival of individual organisms. c) the long-term survival of an entire species of organisms. d) successful reproduction of a species with other members of that species.

Whenever diploid populations are in hardy-weinberg equilibrium at a particular locus a) the allele's frequency should not change from one generation to the next, but its representation in homozygous and heterozygous genotypes may change. b) natural selection, gene flow, and genetic drift are acting equally to change an allele's frequency. c) this means that, at this locus, two alleles are present in equal proportions. d) the population itself is not evolving, but individuals within the population may be evolving.