1. Before doing the experiment, would you expect S. aureus to withstand higher salt concen- trations than E. coli? Explain. 2. Based on what you know about the metabolic activities of yeast already, would you expect the yeast S. cerevisiae to withstand higher glucose concentrations than the two bacterial species? Explain. 3. Bacillus cereus is a common cause of food poisoning, particularly from rice in restaurants. Why could this occur in cooked rice? 4. Relate the results observed in the UV light experiment to the possible effects of sunlight on human skin.