Consider two species of bacteria A and B with the same initial population. The species grow exponentially with growth rate - 0.05 for species A and rg = -0.025 for species B. Will the two species of bacteria ever have the same size? Type your answer here (Enter YES or NO) The time at which they reach the same size is t= Type your answer here (Enter -1000 if their size is never equal)

In the above figure, it shows the typical propagation rate of a worm. Answer the following two questions: a) why does the start phase show a slow propagation? b) why does the finish phase show a slow propagation

A large oil spill in the Pacific Ocean is threatening marine life. Scientists charged with cleaning up the spill believe bioremediation is the best option, but they are not sure what type of bacterial species to use in the bioremediation process. To help them in their decision, they have listed the nutritional modes of each species. Given your knowledge of the different nutritional modes of bacteria, which nutritional mode would be most beneficial in bioremediation of the oil spill? Chemophototroph Extremotroph Photoautotroph Chemoheterotroph

For an estimation of microbial population experiment, you obtained the following results: A. 1000X dilution with 0.1 mL sample volume - 470 colonies B. 10000X dilution with 0.1 mL sample volume - 250 colonies C. 100000X dilution with 0.1 mL sample volume - 100 colonies D. 1000000X dilution with 0.1 mL sample volume 12 colonies For each set of results, determine if the samples are countable plates, and for only the countable plates, calculate the CFU/mL for those plates. For plates that are not countable, please state that and do not perform the calculation (please note that calculating the CFU/mL for a plate that is not countable will be marked as incorrect).

Background info: The cyanobacterium Arthrospira platensis, colloquially known as Spirulina is/was a popular health food/supplement because it is extremely rich in amino acids and vitamins. However, these cyanobacteria also happen to be extremely good at absorbing lead, which means that these supplements are often contaminated with toxic amounts of heavy metals. One suggested application for these cyanobacteria is in bioremediation systems for industrial/mining wastewater contaminated with lead Question: The way that this application would work is that you’d have a sealed concrete pond full of the cyanobacteria that wastewater would flow into and then as the wastewater flows out the other end of the pond, the cyanobacteria are removed. How would this work to remove lead from the water?

Increase K1 to shift the N1-intercept out for the pathogen O No further engineering is needed because there is a steady state point Decrease 12 to shift the N2-intercept up for the pathogen Increase K2 to shift the N2-intercept up for the probiotic

If a single 1.7 × 10−10 m3 bacterium could reproduce through cell division at a rate of 3(t − 0.5t), where t is measured in minutes, how much volume (in m3) will the resulting bacteria colony occupy after 1 hour?   bacteria colony volume = _____ × 104 m3

Which phylum of bacteria are most frequently unregulated and downregulated in CF samples?

If you start out population density of 300 cfu/ml of a bacterium that divides every 20 minutes,what will be the population density after five generations assuming the cells are in the log phase of growth?