1. Structural 2. Functional
It is both a vascular and living organism.
I assume you're asking "how do I know what kind of motherboard I have" and not the usually much easier "which part in the computer is the motherboard" (it's almost certainly the biggest circuit board...
Gram-positive and Gram-negative, which refer to the result of a stain test and imply certain structural characteristics of bacterial cell walls.
Two ways are by temperature and brightness