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.
What is taxable on a dividend depends on the type of dividend you receive. You must report a dividend on your tax return if you can choose to accept either stock or cash and you take the stock. If the dividend can be redeemed for cash immediately, it is taxable.Ordinary dividends, usually received from a corporation or mutual fund, are taxable as ordinary income for you.f there is enough profit left over to pay out dividends to shareholders, the distributions are taxed again to the individual stockholders at their regular tax rates. A C corporation can be taxed at rates as high as 39 percent, as of 2011.