Research a bacterial organism that was not present in this experiment. List out 4 environmental factors (i.e, temperature, pH level, water availability) that affect bacterial growth, and define the optimal growth conditions for your researched bacteria.
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A:
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- List out 4 environmental factors (ie, temperature, pH level, water availability) that affect bacterial growth, and define the optimal growth conditions for your researched bacteria.What is the importance of describing the morphological characteristics of bacterial colonies when cultures were sampled from an environmental source? Explain and justify your points.You perform a quadrant streak and isolate a single colony which contains two distinct species of bacteria. You repeat this with the same results. Provide a possible explanation for this result that does not involve contamination of the sample.
- When observing a streak plate of isolated bacteria as shown below, you see colonies outside the area you streaked. What would you concluded about these colonies?Do the different species of bacteria appear the same or different from each other when grown in media? Do you think it would be easy to identify which of these three species you had just by descriptions of growth? Explain your answerUsing one of the graphs obtained with the medium II, name the different phases of the bacterial growth and indicate the starting and ending time points of these phases as well as the physiological characteristics of the bacteria during each phase
- Streak plate allows microbiologists to isolate one species of bacteria from another. Why is that important?Citing data from the results table, tell which antibiotic is most effective against this type of bacterium. Citing data from the results table, which antibiotic if least effective against this type of bacterium. Explain how you determined the level of effectiveness. Describe what that Petri dish looked like. Hint(a most effective antibiotic has a larger clear area around the antibiotic disk. (a least effective antibiotic has a smaller clear area around antibiotic disk.)Compare and contrast the growth of bacteria in different physical types of media (broths, slants, and agar plates). What might be the advantages and disadvantages of using each type?
- Compare and contrast bacteria living in extreme environmental conditions and bacteria living in “normal” environmental conditions.An attempt to transfer bacteria into new media during the death (Decline) phase of a culture resulted in actual growth of the organisms. What is the most likely explanation of this phenomenon?Describe the difference between the appearance of surface and subsurface colonies in a pour plate. If this is the same bacterial species, why do these differences in colonial growth occur?