The epidermal cell have cuticle (in plants) or chiten (in animals) on their outer tangential walls to perform protective function.
A group of cells that perform a particular function in the body are tissues. (Or tissue)
energy
digestion
Chemical do not perform its function anymore
It means that you press the Ctrl key and holding it down, press the F1 key to perform a certain function on a personal computer and the function you perform depends on the context and the program running etc.
Yes, USB key and flash are just different words for it
USB mean is "Universal Serial Bus."
USB activation keys are a common solution used to increase the security around the use of USB storage devices such as as memory sticks and external drives. The keys function to prevent the spread of malware from such peripheral devices to the machines that they are plugged into. Thus a USB activation key will be used by software to prevent the spread of malware to a USB stick that is not as yet infected and similarily prevent the spread of malware from an infected USB device to something like a computer.
A keyboard which is connected to the computer by use of a USB cable
A USB stick is a portable memory device which can be used on computers and laptop, and for different operating systems. A USB is generally very light and small. It could easily be a key chain or kept in a purse/bag. You could use your USB to save copies of your work, photos, media files or programs.
Control Z is a keyboard function on a Windows computer that will undo the last function. On a Mac keyboard, the same function is performed as Command Z. To perform the function, first press control (or command) and then press the Z key.
Hint hint... high speed
Dialysis is the machin which is used to perform the function of Kidney .
The only function a virus can perform is to make more of themselves.
tissues are group of cell that perform a specific similar function.
If you have special software when you insert your usb key to Mac it allows you to access. Or yiou can actually protect you Mac with password(+usb key). If you are intrested in soft - ProteMac Logon Key is only i know. http://www.protemac.com/logonkey/