1 Microorganisms are divided into seven types: bacteria, archaea, protozoa, algae, fungi, viruses, and multicellular animal parasites (helminths).  Each type has a characteristic cellular composition, morphology, mean of locomotion, and reproduction.
As of 2014, 38,761 people live in Cooke County. The population of the county was 77.2 percent Anglo, 16.7 percent Hispanic, and 3.2 percent African American. The largest town in the county is Gainesville, with a 2014 population of 16,502.
The county seat is at Gainesville, Texas, which is the largest population center and located seven miles south of the Red River and seventy one miles north of Dallas. Cooke County was established on March 20, 1848, and named for William G. Cooke, a hero of the Texas Revolution.