The Carolinas
The plural of the proper noun is Carolinas. It can be used to refer to North and South Carolina as a region.
"Caribbean" is a singular noun. It refers to the region situated in the Caribbean Sea and comprises multiple islands, but as a collective noun, it is considered singular.
Dialect can be both singular and plural. A dialect refers to a specific form of language spoken in a particular region or by a particular group of people. Multiple dialects can exist within a single language.
Yes, "cardia" is a singular term that refers to the region of the stomach adjacent to the esophagus. It can also refer to the heart in a broader anatomical context. The plural form is "cardiae."
The singular form is bacillus (one organism, or one type of organism). The plural is bacilli. Examples: He could clearly see the shape of the bacillus. This bacillus is common in tropical climates. Bacilli were found in his spleen. Various bacilli are endemic to the region.
The plural possessive of region is regions'.
North Carolina is in the Southern Region.
The region of the Carolinas is the south-eastern states.
A herd of antelope regularly usesthis water hole. (singular)Many herds of animals regularly usethis water hole. (plural)
Caribou is the animal. Cariboo is a region in central British Columbia. Caribou is both singular and plural, as in "I saw a caribou." and "I saw five caribou." Other game species such as deer, elk and grouse also follow this convention.
the piedmont region
The plural possessive form of "region" is "regions'". In this form, the apostrophe comes after the "s" because the word is already plural. This indicates that something belongs to or is associated with multiple regions.