Which experiment would most likely contain experimental bias? A. A company that makes pain relief medication tests the effectiveness of their own medicine compared to that of three other brands. B. A student tests the attraction of bees to flowers by placing four different flowers in the same location and counting how many bees visit each. C. A lab performs a test by giving bacterial colonies the same amount of different antibiotics and growing them under the same conditions. D. A chemistry class performs an experiment in which each reaction has the same amount of starting material and begins at the same temperature.

i think that d. wind is the answer.   i missed the question when i answered a. currents.

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.

i think that is new experiments yield untrustworthy data and should be carefully considered, because you don't know what will happen with the experiments.

characteristics of hydrocarbons