Final answer:The blood is wicked once during a BT test, where two drops of synthetic blood are mixed with an anti-A antibody, and observations for clotting are made after one minute.Explanation:The procedure mentioned suggests that the blood is wicked once during the test. After placing two drops of synthetic blood into labeled wells, an anti-A antibody is added to the appropriate well. The mixture is then stirred using a toothpick and left undisturbed for one minute to observe for any clotting. It's crucial to note that the synthetic blood is only sampled once and mixed with the antibody solution to conduct the test efficiently. The mention of synthetic blood and anti-A antibody are essential for understanding the ABO blood typing process being described....

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