Describe the function of mRNA

Are salt and soap nutrients or toxins for yeast? explain.

Why is excretion necessary to maintain homeostasis?

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