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.
Each time you have dividends reinvested, those dividends buy shares and the shares have a cost basis of the price paid for the shares. To accurately calculate capital gains taxes, you must have a record of every share purchased at what price including the shares purchased with reinvested dividends. taxable capital gain is the difference between your selling price for shares and the price you paid for the shares. Your purchase price for shares is called your cost basis. Reinvested dividends are taxed when earned and then add to your cost basis in the investment for capital gains purposes.