Which of the following is an example of a testable question? Are people who read non-fiction smarter than people that read fiction? Does God exist? Does Nyquil cause a decrease in heart rate in mice? Do ninth graders’ GPAs increase with better study habits?

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.