Answer: Study 2: 05% SY medium
Explanation:
The x axis on each graph shows the number of days that has elapsed while the y axis shows the percentage of fruit flies that are still alive. In the Study 1, we notice that all the fruit flies had died off by the 55th day.
In Study 2, we then see that some fruit flies lived past 75 days. Those were fruit flies which had been put in the tube that had only 5% SY medium which contains 5% sugar and 5% killed yeast.
