Veins have a much lower blood pressure than arteries. which of these prevents backflow of blood in veins? a. pressure applied by the heart b. one–way valves in veins c. thin muscular walls of veins

Which statement is most likely megan’s conclusion? the hypothesis is supported because the most common blood type in the united states is ab+. the hypothesis is not supported because the most common blood type in the united states is o+.

Which beat describes the brain stem

Ronald wants to see if a new shower cleaner works better in removing soap than his old cleaner. he uses the new cleaner on one half of the shower tiles and his old cleaner on the other half. identify the independent and dependent variables in this experiment. enter your answer in the space provided.