The first step in any research is to decide on a problem or focus for the investigation. This often happens naturally when you observe something that interests you, but that you can't entirely explain. In your head, a question forms, such as "why did it do that?"
Deciding on a problem to explore and formulating a question is your very first task.
As all good scientists, the question you ask should be informed by existing knowledge and relevant research. A review of the published scientific literature is a good way to do this.
For this research project you will be using mealworms to conduct your study. Your research question must include the effect of "x" on some physiological parameter such as survival, some aspect of behaviour, some aspect of vision or colour vision, or some aspect of hearing. Your TA will be available to help you consider your options as you work on this.