Exploring the Motherboard and Busses

The motherboard represents the logical foundation of the computer. Everything that makes a computer must be attached to the motherboard.
Answer the following questions:
• What are the major components of the motherboard? Provide a brief description of each component.
• Upgrading only the motherboard will give some performance improvement to a computer system. Why would the improvement be limited?
• What is the need for all the different busses found on a motherboard? Why can these busses not be replaced with a single bus?
With 64-bit busses available, why should 32-bit busses be provided as well?