Which of the following statements about the yellowstone national park fires of 1988 is false? a) secondary succession followed the fires. b) the dominant lodgepole pines required fire to complete their normal life history. c) human environmental policy increased the severity of the fires. d) it took years before new vegetation returned to the area. e) severe drought to trigger the fires.

The answer is D

Explanation:

It took years before new vegetation returned to the area because of the fires.

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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.