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Transcript
How quickly do infectious diseases spread? Procedures Suppose a single bacterium is placed on an agar plate and the number of bacteria in the population doubles every 30 minutes. How long do you think it would take before there would be 1000 bacteria? To calculate how long it would actually take for the single bacterium to multiply to form a colony of 1000 bacteria, fill in the number of bacteria at each time in the table. 1 bacterium at the beginning bacteria after 30 minutes bacteria after 1 hour bacteria after 1 hour and 30 minutes bacteria after 2 hours bacteria after 2 hours and 30 minutes bacteria after 3 hours bacteria after 3 hours and 30 minutes bacteria after 4 hours bacteria after 4 hours and 30 minutes bacteria after 5 hours How long would it take for the population of bacteria to increase from 1 bacterium to 500 bacteria? How long would it take for the population of bacteria to increase from 500 bacteria to 1000 bacteria? Use the data from the above table to plot the number of bacteria at each time in the graph. 1 1000 Number of Bacteria 800 600 400 200 0 0 1 2 3 4 5 Hours In the real world, no population of bacteria or any other biological organism can keep increasing exponentially forever. Why not? 2
