A study of microbial pathogen transport in an aqueous environment is to be studied. The target microorganism is Escheria Coli with a characteristic length of 25 micrometers. The pathogen moves at a rate of 2.5 micrometer/second. What model fluid should be used? Why?

propose a hypothesis regarding the organisms (staphylococcus, escherichia, pseudomonas, and bacillus) that will be resistant to the most disinfectants, and why? if the hypothesis is supported, what specific experimental results will be observed? what would be the independent and dependent variable? zone size, disinfectant type, colony count

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A bacterial culture that has been pretreated with penicillin to inhibit its peptidoglycan synthesis is split and put into solutions of various concentrations. The same is done with a control culture with no prior penicillin exposure. Which condition is likely to demonstrate the biggest difference in outcomes between the control culture and the experimental culture? Placing the cultures into an isotonic solution Placing the cultures into a hypotonic solution Placing the cultures into a hypertonic solution The control and experimental cultures should show you the same results in every condition