I've been doing some research on plots of land and their locations, and I've noticed that land is grouped into zones such as Residential-only (R), Residential and Commercial (RC) and Residential, Commerical and Industrial (RCI). There are probably other zones I haven't mentioned.

Does this mean then, that plots of land that are Residential (R) only cannot have buildings like shops and machinery workshops built on it? Zoning determines the types of structures that may be built on a plot of land?