3. In the MRSA case study discussed in class, after 12 weeks a mutant arose. This mu- tant formed smaller colonies on a blood agar plate when compared to the wild type MRSA iso- lated 12 weeks earlier. The ability of that mutant to form small colonies is an example of when compared to the wild type. A. Sweep B. Bottleneck C. Founder effect D. Genetic drift

19. In the Urease test, an organism positive for urease will turn the media alkaline due the production of a. Uric acid b. Peptone c. Lactic Acid d. Ammonia 20. Antibodies are made by a. Red Blood Cells b. Endothelial Cells c. B Cells d. Natural Killer Cells 21. Baritt's reagent consists of a. a-naphthol and potassium hydroxide b. Hydrochloric acid and alcohol c. Peptone and phenol red d. Lactic acid and methyl red 12T ni beau On o ispua niwelle et lorkinw.et ed teum fast SMAO srl not evitizon ai doirw mainsgo nA ph c. Staphylococcus d. Pseudomonas a. Carboxylic acid; CO2 b. Coagulate; coagulin c. Fibrinogin; fibrin d. Protein; amino acids li esa of snoba 22. The urease test is used to help identify members of of its ability to catalyze urea breakdown faster than any other species a. Enterococci b. Proteus i30oppige 112 2.quei o bina b slobri ent species because otri esipage issodao 12 wor ved Jaum woy ansam air 23. The coagulase test is used to identify microorganisms which can…

16. In your experiment, you determined that in 90% lean ground beef, D55=1 min for Salmonella typhi. Which of these is most likely the thermal D55 for this microbe in 80%? A. 2 B. 1 C. 0.5 D. 0.005 E. 0.001

1. a. What are latexes and suspensions, what are their main differences. b. When will you get larger snowflakes in winter in DuBois, when outside temperature is just below 32 F or when outside temperature is near 10 degree F, explain why.