Answer questions 18-19 using the following prompt. You are w…

Answer questiоns 18-19 using the fоllоwing prompt. You аre working in а reseаrch lab that is studying the role of Helicobacter pylori in the formation of stomach ulcers.  You conduct an experiment that compares a wild type H. pylori strain that produces urease (87-3887) to a mutant strain of H. pylori strain that does NOT produce urease (26ul).  You infect piglets with one of the two strains and record the number that are infected and the number that develop stomach ulcers (gastritis) in the table below.