if your talking about the stamen, filament stuff, its not gonna hurt to know it. Chances are you MAY have 1 or 2 questions on it. I don't recall having any on my DAT but it wasn't difficult material to study. I thought the eye was more complicated, so that was the material i just brushed over...........luckily nothing on the eye on my DAT either. Remeber 40 bio questions, and they tend to be more general stuff.
Good luck