University prestige is not important in a doctoral program. The reputation of your advisor is. Far more important though is how well you get along with your advisor. And far, FAR more important is that you pick a field and a research problem based on something you REALLY like. You are setting up your whole career. I find it frankly odd that your concern is school prestige, but you’re talking about three VERY different thesis areas, neuroscience, entomology and nutrition. Pick the one of those that you want to center the rest of your life around.
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