3. What did the Magdeburg experiment demonstrate about air pressure? that horses are not intelligent enough to understand how to defeat atmospheric pressure

that atmospheric pressure on the earth's surface has tremendous force

that the vacuum inside the two attached hemispheres has tremendous suction

that the horses could not get sufficient traction to pull the hemispheres apart

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.