Answer:
The fly cells must be compared with human cells
Step-by-step explanation:
Dr. Gracia's aim is the development of a potential cancer treatment. Remember that the treatment is meant for human beings.
Usually, the pre-clinical trials of the treatment is carried out on other organisms and the success rate is evaluated before trial on humans.
If protein W has been effective on flies, its effect on human cells should also be diligently compared before conclusions are drawn regarding the therapeutic effects of protein W.