The following are the steps in periodontal disease. Place them in order and indicate which one would occur fourth. (Fourth in the sequence of the answers provided, not necessarily a step with the number 4 in a textbook figure) Plaque accumulates on tooth at or below gum line Plaque irritates gums, initiating gingivitis Periodontal pockets form, separating tooth from gingivae Porphyromonas invades tissues Gingivitis progresses to damage bone and cementum around rootWhich of the following is mismatched? Foodborne intoxication - bacteria grow in food and produce toxins, which are ingested Gastroenteritis - inflammation of the mucous membranes of the stomach and intestine Diarrhea - watery stools (feces) None of the other four answers are mismatched Dysentery - presence of blood or mucus in stools; indicates tissue damage by pathogenWhich of the following is mismatched? Foodborne intoxication - bacteria grow in food and produce toxins, which are ingested Gastroenteritis - inflammation of the mucous membranes of the stomach and intestine Diarrhea - watery stools (feces) None of the other four answers are mismatched Dysentery - presence of blood or mucus in stools; indicates tissue damage by pathogen.