The test may cause momentary gagging because the back of the throat is a sensitive area, but it should not be painful. The sample your doctor collects is taken to a laboratory, where it is put on a plate that allows any bacteria on it to grow. This process is called a culture.
Often these are called transition zones which represent the start and end of a specific region and can be large or small. For example, the transition zone between Sub-Saharan Africa and North Africa is rather large because there is a mixing between the two regions. Regional geographers study this zone as well as the distinct characteristics of Sub-Saharan Africa and North Africa.
Definition of Transition Transitions are words and phrases that provide a connection between ideas, sentences, and paragraphs. Transitions help to make a piece of writing flow better. They can turn disconnected pieces of ideas into a unified whole, and prevent a reader from getting lost in the storyline. Since the goal of a writer is to convey information clearly and concisely, transitions help achieve that aim by providing a logical connection between one or more sections of a piece of writing.