The dissolved oxygen concentrations were consistently higher in the lake with zooplankton and trout even though the lakes and the phosphorus levels were identical. Why could having consumers as well as producers in the lake change the amount of dissolved oxygen in the lake

answer; ///i believe the answer is (antioxidant);

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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.