Which statement about electric and magnetic fields is ture? A) Electric fields must leave a positive charge and end on a negative charge. B) Electric fields and magnetic fields start at a positive and end at a negative. C) Magnetic fields must start at the North pole of a magnet and end at the south pole of a magnet. D) Electric fields and magnetic fields loop from north to south.

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.