A solution at pH 11.5 is

Drag the tiles to the correct boxes to complete the pairs. match the nitrogenous base of dna with its complement.

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 organ controls breathing? lungs alveoli heart diaphragm