The oropharynx is the part of the throat just behind the mouth. It begins where the oral cavity stops. It includes the base of the tongue (the back third of the tongue), the soft palate (the back part of the roof of the mouth), the tonsils, and the side and back wall of the throat.ral cavity cancer, or just oral cancer, is cancer that starts in the mouth (also called the oral cavity). Oropharyngeal cancer starts in the oropharynx, which is the part of the throat just behind the mouth.
polymorphism - (biology) the existence of two or more forms of individuals within the same animal species (independent of sex differences) biological science, biology - the science that studies living organisms
Polymorphism is a change in DNA sequence, which is common in a population. In other words, there needs to be more than one phenotype for a particular character in a population for it to be called polymorphism.y HAW. Mutation vs Polymorphism. In eukaryotes, DNA is found in chromosomes in the nucleus. Chromosomes are made of a single molecule of DNA and histone proteins. Chromosomes are linear, and DNA in them is double stranded. There are many chromosomes in a single nucleus.