Which explains a difference between prokaryotic and eukaryotic gene reguation? A. Eukaryotic gene regulation is controlled by more than one promoter and one regulator. B. Prokaryotes do not have mRNA, so they do not have processes to degrade mRNA. C. Eukaryotes utilize operons, so they do not need to produce sections of mRNA. D. Prokaryotes process DNA in the nucleus, so genes do not need to be activated.

answer: c.

explanation:

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.

the answer would be   10%

c is the answer to this question. altitude affects the weather because air molecules evaporate.