The role of antibodies in the human body is to A. stimulate pathogen reproduction to produce additional white blood cells
B. increase the production of guard cells to defend against pathogens
C. promote the production of antigens to stimulate an immune response
D. recognize foreign antigens and mark them for destruction

What kind of action is a cause of air pollution

The image below shows a common blood pressure gauge. what does this device do? a. measures the level of oxygen present in the blood b. measures the pressure of blood when the lungs expand and compress c. measures the electrical activity of the heart d. measures the pressure of blood when the heart contracts and relaxes

If a grape were placed in a hypertonic solution what would happen and why?