Which of the following describes an atom

Which class of molecules functions as chemical signals? hormones water carbohydrates proteins

Stage in which a typical star has completely stopped fusion

If the concentration of phosphate in the cytosol is 2.0 mm and the concentration of phosphate in the surrounding fluid is 0.1 mm, how could the cell increase the concentration of phosphate in the cytosol? a) passive transportb) diffusionc) active transportd) osmosise) facilitated diffusion