The secretion of hormones is an example of a physiological feedback loop. when hormones are needed, they are secreted by glands. when the hormones are no longer needed, the glands are signaled to stop secreting the hormones until they are needed again. thus, the basic function of a physiological feedback loop is

14) 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.