Scientists have established that some of the layers of earth are solid, some are liquid, and some are semi-fluid. explain how the scientists are able to determine the liquid and solid layers. use at least two pieces of evidence to support your answer.

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