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.
between a money purchase pension plan and a profit-sharing plan is that contributions to the former must be based on a fixed formula specified in the plan 8 The full title of the federal law is the Economic Growth and Tax Relief Reconciliation Act of 2001, Public