I can't vote on member challanges, but I did want to at least leave you a comment to say that I think this is the best entry in the Banana challange. I was a Bio major in college, and you hit it right on the head with this one--it's even sliced properly! Bravo!
I'm voting on this challenge (as I do all challenges) by first asking myself, does this photo have any appeal outside the boundaries of the challenge. In other words, art comes first. In this case I have to say, "no". The subject does not appeal to me as something I would want to look at again and again. Technically, the lighting is flat, lacking drama and detail. There is nowhere for the eye to rest.