In order to buy stock, you must go and find a stock broker. You do not always need a broker, but it is more convenient to have one to manage your stock. It also makes your life in the market easier. The broker will manage your shares and you tell him when you want to buy or sell your stock.
Well we have SRAM(Static Random Access Memory) is faster, have a lower density but it is more expensive.
While DRAM(Dynamic Random access memory) is just the opposite.
Those are the only two, I know exist.
It is the finance / administration function that records time accounting and procures the needed items
Explanation:
To move substances against a concentration or electrochemical gradient, the cell must utilize energy in the form of ATP during active transport. Primary active transport, which is directly dependent on ATP, moves ions across a membrane and creates a difference in charge across that membrane.
