The provided text does not include sufficient information to determine Morgan's weight gain over 5 or 10 days. To answer this question, one would require Morgan's initial weight and subsequent measurements on specific days.
The information provided does not specify the details of Morgan's weight fluctuations over a period of 5 or 10 days. What is given is data regarding weightlifting before and after a class, participants in a special weight-loss diet, changes in body size and dentition during childhood, and the hypothesis testing with different weight groups.
To accurately determine how much weight Morgan gained within 5 or 10 days, there needs to be data indicating Morgan's starting weight and subsequent weights at the specified time intervals.
In relation to other parts of the provided information, we can analyze variability in weight-loss outcomes, factors contributing to weight changes, and how growth patterns can influence weight at different life stages. However, with the given details, it is not possible to conclude Morgan's weight gain without knowing the specific context or timeframe of weight measurement related to Morgan.