No the system clock is built into the motherboard.
System Unit
Yes, NICs can be a form of expansion card (as long as the NIC is not built into the motherboard).
Video Card.
Pioneer AVIC-N5 In-Dash GPS Navigation System offers a USB Direct feature and a built in memory card slot for memory expansion.
Video Card.
The purpose of a time card clock is to accurately know hourly employee's time in the office. This system is being replaced by employees clocking in on the computer.
yes, its what enables the video card to be attached to the motherboard if I understand your question right
Yes, it can. Some motherboards have an intergrated video card.
The expansion card called the host adapter is responsible for managing all devices on the SCSI bus. SCSI is a peer to peer interface
Expansion Slot is just like port into which expansion card can be inserted. In otherwords port is female and card is male.
A clock card. Used by employees to clock in and out of work. The card records the employees weekly working hours.
Without a motherboard no computer would function ! It is the main circuit board that holds the processor, memory modules and any expansion cards such as Graphics card, Modem card, Network card etc. Any harddisk drives, CD/DVD drives and floppy drives are connected to and controlled by the Motherboard. As are a keyboard, mouse, printer or scanner.