Q Virtual Lab 4. Investigating Bacterial Growth Prediction Explain whether or not you think all bacteria need oxygen in order to grow. Observations Table 2. Observations of bacterial growth in aerobic and anaerobic conditions. Bacteria Species Observations Amount of Growth in Medium A (Environment with oxygen) Amount of Growth in Medium B (Environment without oxygen) B. stearothermophilus C. sporogenes E. coli Results Table 3. Oxygen Needs Based on the observations you recorded, complete the table below. Enter one of the following: “bacteria need oxygen”, “bacteria don’t need oxygen”, or “bacteria can grow with or without oxygen” for each species of bacterial listed below. Bacterial Species Oxygen Needs B. stearothermophilus (Vial 1) C. sporogenes (Vial 2) E. coli (Vial 3) Analyze and Conclude 1. Conclude Based on your observations, is it possible that bacterial can thrive in a sealed can and cause vegetables to spoil? 2. Compare and Contrast How did the presence of oxygen affect bacterial growth? 3. Evaluate What factors in addition to oxygen might influence the growth of different types of bacteria? 4. Infer Scientists hypothesize that bacterial may have been among the first living organisms on Earth. If this is true, which type of bacteria do you think was the first to develop on Earth: bacteria that need oxygen or bacteria that don’t need oxygen? Explain your answer. 5. Infer What might the results of this lab mean in terms of the ability for microbes to live and thrive on other planets or moons that don’t have oxygen in their atmospheres?