A population of 10 yeast cells is put into a flask with growth
media that contains all of the nutrients required for growth. The
yeast has a doubling time of two hours; four hours after adding the
yeast to the flask the population size is 40 cells. After three
days, the population size stabilizes at around 500 cells. Is this
population exhibiting logistic or exponential growth? Explain.
In exponential growth, cells will keep on growing exponentially, whereas, in logistic growth, the population stabilizes after a period of exponential growth to a stable level depending on nutrient availability, as shown in the images above. So the population is growing logistically and not exponentially, as the number of cells stabilizes to around 500 after some time.
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