Final answer:
The exact day when Paramecium Aurelia reaches its carrying capacity is not provided in the information given. An analysis of the specific lab experiment data is required to determine the day the population levels off.
Step-by-step explanation:
The information provided doesn't directly answer when Paramecium Aurelia reaches its carrying capacity. In an ecological context, carrying capacity refers to the maximum number of individuals in a species that an environment can support. Typically, growth curves show a phase of exponential growth followed by a stabilization phase where the population levels off at the carrying capacity. However, in the absence of specific data from the 'Virtual Population Lab' simulation or an experiment graph, a precise day cannot be determined. To answer this question accurately, one would need to examine the data from the lab experiment that indicates when the population growth of Paramecium Aurelia levels off.