The chief ion used to maintain the volume of fluid inside cells and maintain cell integrity is:

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

What is the ratio of carbon hydrogen and oxygen in a carbohydrate?

When a plant is genetically identical to its parent plant what is this called