Diffusion Across a Cell Membrane. Diffusion is the movement of a substance across a membrane. Substances diffuse across cell membranes in a process known as passive transport. This means that the cell does not expend any energy in transporting substances across the cell membrane. Instead, substances move down their concentration gradient as a result of random thermal motion.
401k and profit sharing plans are both forms of retirement plans. They allow employees to make pre-tax contributions to an account where contributions and earnings are not taxed until distributed. Some 401k plans require an employer to make contributions to a plan.
At the current time, CONUS COLA is the only taxable allowance. However, under federal law, all allowances created after 1986 are supposed to be taxable. Annual âCOLAâ goes into base pay which is taxable â COLA would be better named Annual base pay increase due to higner cost of living.