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.
The IRS requires each partner to pay income taxes on his distributive share.. This is the portion of profits to which the partner is entitled under a partnership agreement -- or under state law, if the partners didn't make an agreement.he partnership must also provide a Schedule K-1 to the IRS and to each partner, which breaks down each partner's share of the business's profits and losses. In turn, each partner reports this profit and loss information on his or her individual tax return (Form 1040), with Schedule E attached.