How do photosynthesis and cellular resperation work together?

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

Aplant may open end close its stomata to prevent excess water loss and maintain

Eutrophication caused by human nutrient pollution.