- There's a lot of things that technically you are doing in your experiment that are potentially creators of noise, and that's obviously something as best as one can one can pay attention to and try to minimize. - The way I was preparing the samples was pretty much like assembly line style. So in my case with the agar sandwich, I made sure that when I was picking maize seedlings to use, I would just start from the left end of the row of seedlings and go to the right end, and I wouldn't pick and choose. I would always make sure that I was positioning the filter paper onto the agar surface in pretty much the exact same position every single time. The filter paper was always of a consistent size every single time. The agar block that I was applying to the other side of the root was of specified dimensions every single time. - Well, noise in your experiment is going to be very case-dependent, but the one variable of noise is obviously you. And that is, how carefully you conduct your experiment. So that is one factor of noise that, at least to some extent, you have some control over, whether that's from pipetting to timekeeping of collecting data points in your experiment. - In early iterations of the agar sandwich, every setup was like a work of art, because each one had its own little nuances or uniqueness to it. That has very little place in science. You want to make sure that everything is consistent and mechanical as possible so that there is as little variation between your samples as possible.