What is the best definition of diffusion?

random movement of molecules across a concentration gradient until the difference in concentration between two regions is near zero

a process in which molecules move across a semipermeable membrane until the number of molecules of water is nearly equal on both sides

net movement of molecules across a permeable membrane bilayer that requires transport proteins

the exchange of solute molecules across a permeable membrane from areas of high concentration to areas of low concentration

Abody cell has been growing and at synthesis proteins.in the nucleus of this body cell,dna replication is taking place. and a copy of the cells genetic material is copied.which of the following is the best conclusion you can make about the life cycle of this cell ? a) the cell is ready to undergo mitosis.and a chemical signal will send the cell to prophase b)the cell is undergoing meiosis and will cross over the genetic material next c)the cell is in the s phase of interphase and will move next to the g2 phase d) the cell is in the g2 phase of the interphase and is ready to begin diving