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.
Profit Sharing Plan. The maximum tax deductible contribution to a Profit Sharing plan is like that of a SEP, 25% of compensation or $49,000 if less for each eligible employee (20% of gross earned income after the Â½ FICA deduction).ith the right consulting firm providing assistance, a Profit Sharing plan can be an excellent way. for the business owner to save for retirement. 401(k) Plan. A 401(k) plan is a Profit Sharing plan which allows the employees to make their own tax deductible contributions.