CHEGG Two closely related species are found to be fixed for two different electrophoretically detected alleles at a locus encoding an enzyme. How could you demonstrate that this divergence is a result of natural selection rather than neutral evolution

format change of dna.  

answer; i believe the answer is hydraulic action;

the oxygenated blood then leaves the lungs through pulmonary veins, which return it to the left heart, completing the pulmonary cycle. this blood then enters the left atrium, which pumps it through the mitral valve into the left ventricle. from the left ventricle, the blood passes through the aortic valve to the aorta.

deoxygenated blood leaves through the right ventricle through the pulmonary artery. from the right atrium, the blood is pumped through the tricuspid valve (or right atrioventricular valve), into the right ventricle.