proteins have all of the amino acids necessary to build and repair cells. Proteins are the only food source that is capable of building and repairing cells.
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The functions keys on a laptop are sort of a shortcut for the user. They have function keys for volume, refresh and search to name a few. This is a way to complete your task faster.
there is no "all" key on the keyboard
The keys on a computer keyboard are used to type letters and perform functions such as save for copy and paste. The keys on a musical keyboard are used to produced different notes.
Manipulative keys are special keys used to manipulate data in the document.
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Standard keyboards are usually 104 keys, though some may have some extra ones for additional functions.
Function keys are the keys that start with F at the top of your keyboard. They have different functions depending on the exact programs you are running. For instance, in a browser, F5 refreshes the page, while in games, it might be the Save Game option.
http://www.cookco.us/technology/shortcut_keys.htm
The function keys are the top row of keys on the keyboard, normally labelled F1-F12.By themselves they have no function - they are 'blank' spare keys meant for programs that want a place to put various keyboard shortcuts.That is, the function of the function keys is not determined by the keys but by the program using them, and could be anything or nothing.
A joystick is an input device to a computer. With it you move a cursor. Usually there are additional keys or buttons to perform other input functions (selection, etc.).
For laptops, press and hold the Func key and press one of the functions. One my laptop the functions are blue symbols above misc other keys on the keyboard.