It is possible for a patient to have gingivitis that is not caused by bacterial plaque. Gingivitis can be caused from an allergic reaction or fungal infection.

La complejidad de diseño del lenguaje se debe a la necesidad de facilitar la eficacia comunicativa. 

La comunicación en monos no es arbitraria. 

 Establishing a connection between two attribute tables (in two separate feature files) by finding an attribute common to both

A classification method where the interval is determined by class intervals on a geometric series (such as nested circles/ squares or radiating lines)  

 A range of colors indicates a progression of attribute values. Colors can vary in intensity, range, or both

A _________ is the fit of a theoretical sphere, spheroid, or geoid to a surface; these are used to apply measures of longitude and latitude to exact locations on Earth’s surface. WGS 84 (G1674)  NAD83 are examples. 

 A graph showing the distribution of values within a set of data.

A  file that contains map data and associated data layer(s) and/or other map data such as attributes; a .mxd  file.

All the data presented in various map layers is referenced to a single base map layer. An example would be a completed mapping project where all the pictures of the SPC campus buildings have been geo-referenced to the Pinellas County shapefile,