Question

which of the following statements is true?

A during active transport, a material may be moved from an area of low concentration to an area of high concentration

B During passive transport, energy is used to move material against a concentration gradient

C during an active transport, water is pumped across a membrane to equalize the concentration of salts on both sides

D during passive transport, osmosis allows salts to move from one side of the membrane to the other to equalize concentrations on both sides